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Dr Elke Roediger's Outputs (46)

A toy model for gas sloshing in galaxy clusters (2024)
Journal Article
Roediger, E., Vaezzadeh, I., & Nulsen, P. (2024). A toy model for gas sloshing in galaxy clusters. Monthly notices of the Royal Astronomical Society, 529(1), 563-574. https://doi.org/10.1093/mnras/stae493

We apply a toy model based on ‘pendulum waves’ to gas sloshing in galaxy clusters. Starting with a galaxy cluster potential filled with a hydrostatic intracluster medium (ICM), we perturb all ICM by an initial small, unidirectional velocity, i.e. an... Read More about A toy model for gas sloshing in galaxy clusters.

Developing undergraduate practical skills and independence with ‘at home practical kits’ (2024)
Journal Article
Hubbard, K., Henri, D., Scott, G., Snelling, H., & Roediger, E. (2024). Developing undergraduate practical skills and independence with ‘at home practical kits’. International journal of science education, https://doi.org/10.1080/09500693.2024.2311087

The COVID-19 pandemic posed significant challenges for practical teaching within the sciences. While many instructors adopted innovative alternatives to conventional practicals, many relied on digital approaches that did not give students hands-on ex... Read More about Developing undergraduate practical skills and independence with ‘at home practical kits’.

A Chandra Study of the NGC 7618/UGC 12491 Major Group Merger at Apogee: Multiple Cold Fronts, Boxy Wings, Filaments, and Arc-shaped Slingshot Tails (2023)
Journal Article
Machacek, M. E., Jones, C., Kraft, R. P., Forman, W. R., Roediger, E., Sheardown, A., & Wan, J. T. (2023). A Chandra Study of the NGC 7618/UGC 12491 Major Group Merger at Apogee: Multiple Cold Fronts, Boxy Wings, Filaments, and Arc-shaped Slingshot Tails. The Astrophysical journal, 958(1), Article 93. https://doi.org/10.3847/1538-4357/ad00b2

Analyses of major group mergers are key to understanding the evolution of large-scale structure in the Universe and the microphysical properties of the hot gas in these systems. We present imaging and spectral analyses of deep Chandra observations of... Read More about A Chandra Study of the NGC 7618/UGC 12491 Major Group Merger at Apogee: Multiple Cold Fronts, Boxy Wings, Filaments, and Arc-shaped Slingshot Tails.

AMUSE-Antlia. I. Nuclear X-Ray Properties of Early-type Galaxies in a Dynamically Young Galaxy Cluster (2023)
Journal Article
Hu, Z., Su, Y., Li, Z., Hess, K. M., Kraft, R. P., Forman, W. R., …Roediger, E. (2023). AMUSE-Antlia. I. Nuclear X-Ray Properties of Early-type Galaxies in a Dynamically Young Galaxy Cluster. The Astrophysical journal, 956(2), Article 104. https://doi.org/10.3847/1538-4357/acf292

To understand the formation and growth of supermassive black holes (SMBHs) and their coevolution with host galaxies, it is essential to know the impact of environment on the activity of active galactic nuclei (AGNs). We present new Chandra X-ray obse... Read More about AMUSE-Antlia. I. Nuclear X-Ray Properties of Early-type Galaxies in a Dynamically Young Galaxy Cluster.

Resilience of sloshing cold fronts against subsequent minor mergers (2022)
Journal Article
Vaezzadeh, I., Roediger, E., Cashmore, C., Hunt, M., Zuhone, J., Forman, W., …Churazov, E. (2022). Resilience of sloshing cold fronts against subsequent minor mergers. Monthly notices of the Royal Astronomical Society, 514(1), 518-534. https://doi.org/10.1093/mnras/stac784

Minor mergers are common in galaxy clusters. They have the potential to create sloshing cold fronts (SCFs) in the intracluster medium of the cluster. However, the resilience of SCFs to subsequent minor mergers is unknown. Here we investigate the exte... Read More about Resilience of sloshing cold fronts against subsequent minor mergers.

GASP XXIX-unwinding the arms of spiral galaxies via ram-pressure stripping (2020)
Journal Article
Bellhouse, C., McGee, S. L., Smith, R., Poggianti, B. M., Jaffé, Y. L., Kraljic, K., Franchetto, A., Fritz, J., Vulcani, B., Tonnesen, S., Roediger, E., Moretti, A., Gullieuszik, M., & Shin, J. (2020). GASP XXIX-unwinding the arms of spiral galaxies via ram-pressure stripping. Monthly notices of the Royal Astronomical Society, 500(1), 1285-1312. https://doi.org/10.1093/mnras/staa3298

We present the first study of the effect of ram pressure ‘unwinding’ the spiral arms of cluster galaxies. We study 11 ram-pressure stripped galaxies from GASP (GAs Stripping Phenomena in galaxies) in which, in addition to more commonly observed ‘jell... Read More about GASP XXIX-unwinding the arms of spiral galaxies via ram-pressure stripping.

GASP. XXI. Star Formation Rates in the Tails of Galaxies Undergoing Ram Pressure Stripping (2020)
Journal Article
Gullieuszik, M., Poggianti, B. M., McGee, S. L., Moretti, A., Vulcani, B., Tonnesen, S., Roediger, E., Jaffé, Y. L., Fritz, J., Franchetto, A., Omizzolo, A., Bettoni, D., Radovich, M., & Wolter, A. (2020). GASP. XXI. Star Formation Rates in the Tails of Galaxies Undergoing Ram Pressure Stripping. The Astrophysical journal, 899(1), Article 13. https://doi.org/10.3847/1538-4357/aba3cb

© 2020. The American Astronomical Society. All rights reserved.. Using MUSE observations from the GASP survey, we study 54 galaxies undergoing ram pressure stripping (RPS) and spanning a wide range in galaxy mass and host cluster mass. We use this ri... Read More about GASP. XXI. Star Formation Rates in the Tails of Galaxies Undergoing Ram Pressure Stripping.

The ram pressure stripped radio tails of galaxies in the Coma cluster (2020)
Journal Article
Chen, H., Sun, M., Yagi, M., Bravo-Alfaro, H., Brinks, E., Kenney, J., Combes, F., Sivanandam, S., Jachym, P., Fossati, M., Gavazzi, G., Boselli, A., Nulsen, P., Sarazin, C., Ge, C., Yoshida, M., & Roediger, E. (2020). The ram pressure stripped radio tails of galaxies in the Coma cluster. Monthly notices of the Royal Astronomical Society, 496(4), 4654-4673. https://doi.org/10.1093/mnras/staa1868

Previous studies have revealed a population of galaxies in galaxy clusters with ram pressure stripped (RPS) tails of gas and embedded young stars. We observed 1.4 GHz continuum and H I emission with the Very Large Array in its B-configuration in two... Read More about The ram pressure stripped radio tails of galaxies in the Coma cluster.

The effects of gravitation and fluid dynamics on velocity estimation by stagnation point method of a minor galaxy cluster merger, by analysis of full hydro + N-body simulations (2020)
Thesis
Fish, T. M. (2020). The effects of gravitation and fluid dynamics on velocity estimation by stagnation point method of a minor galaxy cluster merger, by analysis of full hydro + N-body simulations. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4224503

Galaxy clusters are collections of galaxies that grow by merging with galaxies or other clusters. Galaxy clusters are predominantly dark matter and a hot plasma called the intracluster medium (ICM), which can be observed through X-ray bright emission... Read More about The effects of gravitation and fluid dynamics on velocity estimation by stagnation point method of a minor galaxy cluster merger, by analysis of full hydro + N-body simulations.

GASP. XXII. the Molecular Gas Content of the JW100 Jellyfish Galaxy at z ∼ 0.05: Does Ram Pressure Promote Molecular Gas Formation? (2020)
Journal Article
Moretti, A., Paladino, R., Poggianti, B. M., Serra, P., Roediger, E., Gullieuszik, M., Tomičić, N., Radovich, M., Vulcani, B., Jaffé, Y. L., Fritz, J., Bettoni, D., Ramatsoku, M., & Wolter, A. (2020). GASP. XXII. the Molecular Gas Content of the JW100 Jellyfish Galaxy at z ∼ 0.05: Does Ram Pressure Promote Molecular Gas Formation?. The Astrophysical journal, 889(1), https://doi.org/10.3847/1538-4357/ab616a

Within the GASP survey, aimed at studying the effect of ram pressure stripping on star formation quenching in cluster galaxies, we analyze here ALMA observations of the jellyfish galaxy JW100. We find an unexpected large amount of molecular gas (∼2.5... Read More about GASP. XXII. the Molecular Gas Content of the JW100 Jellyfish Galaxy at z ∼ 0.05: Does Ram Pressure Promote Molecular Gas Formation?.

GASP XXIII: a jellyfish galaxy as an astrophysical laboratory of the baryonic cycle (2019)
Journal Article
Poggianti, B. M., Ignesti, A., Gitti, M., Wolter, A., Brighenti, F., Biviano, A., George, K., Vulcani, B., Gullieuszik, M., Moretti, A., Paladino, R., Bettoni, D., Franchetto, A., Jaffé, Y. L., Radovich, M., Roediger, E., Tomičić, N., Tonnesen, S., Bellhouse, C., Fritz, J., & Omizzolo, A. (2019). GASP XXIII: a jellyfish galaxy as an astrophysical laboratory of the baryonic cycle. The Astrophysical journal, 887(2), Article 155. https://doi.org/10.3847/1538-4357/ab5224

© 2019. The American Astronomical Society. All rights reserved. With MUSE, Chandra, VLA, ALMA, and UVIT data from the GASP program, we study the multiphase baryonic components in a jellyfish galaxy (JW100) with a stellar mass 3.2 × 1011 M o hosting a... Read More about GASP XXIII: a jellyfish galaxy as an astrophysical laboratory of the baryonic cycle.

The rotational profiles of cluster galaxies (2019)
Journal Article
Bilton, L. E., Hunt, M., Pimbblet, K. A., & Roediger, E. (2019). The rotational profiles of cluster galaxies. Monthly notices of the Royal Astronomical Society, 490(4), 5017-5032. https://doi.org/10.1093/mnras/stz2927

© 2019 The Author(s) We compile two samples of cluster galaxies with complimentary hydrodynamic and N-body analysis using FLASH code to ascertain how their differing populations drive their rotational profiles and to better understand their dynamical... Read More about The rotational profiles of cluster galaxies.

ALMA Unveils Widespread Molecular Gas Clumps in the Ram Pressure Stripped Tail of the Norma Jellyfish Galaxy (2019)
Journal Article
Jáchym, P., Kenney, J. D., Sun, M., Combes, F., Cortese, L., Scott, T. C., Sivanandam, S., Brinks, E., Roediger, E., Palouš, J., & Fumagalli, M. (2019). ALMA Unveils Widespread Molecular Gas Clumps in the Ram Pressure Stripped Tail of the Norma Jellyfish Galaxy. The Astrophysical journal, 883(2), Article 145. https://doi.org/10.3847/1538-4357/ab3e6c

© 2019 The American Astronomical Society. All rights reserved. We present the first high-resolution map of the cold molecular gas distribution as traced by CO(2-1) emission with ALMA in a long ram pressure stripped tail. The Norma cluster galaxy ESO... Read More about ALMA Unveils Widespread Molecular Gas Clumps in the Ram Pressure Stripped Tail of the Norma Jellyfish Galaxy.

The first holistic view of minor mergers of galaxy clusters (2019)
Thesis
Sheardown, A. J. (2019). The first holistic view of minor mergers of galaxy clusters. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4221856

Utilising hydrodynamic + N-body simulations, we present the first holistic view of minor mergers of galaxy clusters. A minor merger describes the merging of a main cluster and a less massive subhalo, this could be a subcluster, group or an elliptical... Read More about The first holistic view of minor mergers of galaxy clusters.

Extended X-ray study of M49: The frontier of the Virgo cluster (2019)
Journal Article
Su, Y., Kraft, R. P., Nulsen, P. E. J., Jones, C., Maccarone, T. J., Mernier, F., Lovisari, L., Sheardown, A., Randall, S. W., Roediger, E., Fish, T. M., Forman, W. R., & Churazov, E. (2019). Extended X-ray study of M49: The frontier of the Virgo cluster. Astronomical Journal, 158(1), Article 6. https://doi.org/10.3847/1538-3881/ab1d51

The M49 group, residing outside the virial radius of the Virgo cluster, is falling onto the cluster from the south. We report results from deep XMM-Newton mosaic observations of M49. Its hot gas temperature is 0.8 keV at the group center and rises to... Read More about Extended X-ray study of M49: The frontier of the Virgo cluster.

A new class of x-ray tails of early-type galaxies and subclusters in galaxy clusters: Slingshot tails versus ram pressure stripped tails (2019)
Journal Article
Sheardown, A., Fish, T. M., Roediger, E., Hunt, M., Zuhone, J., Su, Y., Kraft, R. P., Nulsen, P., Churazov, E., Forman, W., Jones, C., Lyskova, N., Eckert, D., & De Grandi, S. (2019). A new class of x-ray tails of early-type galaxies and subclusters in galaxy clusters: Slingshot tails versus ram pressure stripped tails. The Astrophysical journal, 874(2), 112. https://doi.org/10.3847/1538-4357/ab0c06

© 2019. The American Astronomical Society. All rights reserved.. We show that there is a new class of gas tails - slingshot tails - that form as a subhalo (i.e., a subcluster or early-type cluster galaxy) moves away from the cluster center toward the... Read More about A new class of x-ray tails of early-type galaxies and subclusters in galaxy clusters: Slingshot tails versus ram pressure stripped tails.

Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario (2019)
Journal Article
Lyskova, N., Churazov, E., Zhang, C., Forman, W., Jones, C., Dolag, K., Roediger, E., & Sheardown, A. (2019). Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario. Monthly notices of the Royal Astronomical Society, 485(2), 2922-2934. https://doi.org/10.1093/mnras/stz597

We study a merger of the NGC 4839 group with the Coma cluster using X-ray observations from the XMM–Newton and Chandra telescopes. X-ray data show two prominent features: (i) a long (∼600 kpc in projection) and bent tail of cool gas trailing (towards... Read More about Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario.

Constraining Gas Motions in the Intra-Cluster Medium (2019)
Journal Article
Simionescu, A., ZuHone, J., Zhuravleva, I., Churazov, E., Gaspari, M., Nagai, D., Werner, N., Roediger, E., Canning, R., Eckert, D., Gu, L., & Paerels, F. (2019). Constraining Gas Motions in the Intra-Cluster Medium. Space Science Reviews, 215(2), Article 24. https://doi.org/10.1007/s11214-019-0590-1

The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM) remains one of the last missing key ingredients in understanding the microphysical properties of these hot baryons and constraining our models of the growth and... Read More about Constraining Gas Motions in the Intra-Cluster Medium.

Variability and proper motion of x-ray knots in the jet of Centaurus A (2019)
Journal Article
Snios, B., Wykes, S., Nulsen, P. E. . J., Kraft, R. P., Meyer, E. T., Birkinshaw, M., Worrall, D. M., Hardcastle, M. J., Roediger, E., Forman, W. R., & Jones, C. (2019). Variability and proper motion of x-ray knots in the jet of Centaurus A. The Astrophysical journal, 871(2), Article 248. https://doi.org/10.3847/1538-4357/aafaf3

© 2019. The American Astronomical Society. All rights reserved. We report results from Chandra observations analyzed for evidence of variability and proper motion in the X-ray jet of Centaurus A. Using data spanning 15 yr, collective proper motion o... Read More about Variability and proper motion of x-ray knots in the jet of Centaurus A.

Spectacular Hubble Space Telescope Observations of the Coma Galaxy D100 and Star Formation in Its Ram Pressure-stripped Tail (2019)
Journal Article
Cramer, W. J., Kenney, J. D., Sun, M., Crowl, H., Yagi, M., Jáchym, P., Roediger, E., & Waldron, W. (2019). Spectacular Hubble Space Telescope Observations of the Coma Galaxy D100 and Star Formation in Its Ram Pressure-stripped Tail. The Astrophysical journal, 870(2), 63. https://doi.org/10.3847/1538-4357/aaefff

© 2019. The American Astronomical Society. We present new HST F275W, F475W, and F814W imaging of the region of the Coma cluster around D100, a spiral galaxy with a remarkably long and narrow (60 × 1.5 kpc) ram pressure-stripped gas tail. We find blue... Read More about Spectacular Hubble Space Telescope Observations of the Coma Galaxy D100 and Star Formation in Its Ram Pressure-stripped Tail.

The recent growth history of the Fornax Cluster derived from simultaneous sloshing and gas stripping: Simulating the infall of NGC 1404 (2018)
Journal Article
Sheardown, A., Roediger, E., Su, Y., Kraft, R. P., Fish, T., ZuHone, J. A., Forman, W. R., Jones, C., Churazov, E., & Nulsen, P. E. (2018). The recent growth history of the Fornax Cluster derived from simultaneous sloshing and gas stripping: Simulating the infall of NGC 1404. The Astrophysical journal, 865(2), 118. https://doi.org/10.3847/1538-4357/aadc0f

We derive the recent growth history of the Fornax Cluster, in particular the recent infall of the giant elliptical galaxy NGC 1404. We show, using a simple cluster minor merger simulation tailored to Fornax and NGC 1404, that a second or more likely... Read More about The recent growth history of the Fornax Cluster derived from simultaneous sloshing and gas stripping: Simulating the infall of NGC 1404.

Gas sloshing regulates and records the evolution of the Fornax Cluster (2017)
Journal Article
Su, Y., Nulsen, P. E., Kraft, R. P., Roediger, E., Zuhone, J. A., Jones, C., Forman, W. R., Sheardown, A., Irwin, J. A., & Randall, S. W. (2017). Gas sloshing regulates and records the evolution of the Fornax Cluster. The Astrophysical journal, 851(1), 69. https://doi.org/10.3847/1538-4357/aa989e

We present results of a joint Chandra and XMM-Newton analysis of the Fornax Cluster, the nearest galaxy cluster in the southern sky. Signatures of merger-induced gas sloshing can be seen in the X-ray image. We identify four sloshing cold fronts in th... Read More about Gas sloshing regulates and records the evolution of the Fornax Cluster.

Uplift, Feedback, and Buoyancy: Radio Lobe Dynamics in NGC 4472 (2017)
Journal Article
Gendron-Marsolais, M., Kraft, R. P., Bogdan, A., Hlavacek-Larrondo, J., Forman, W. R., Jones, C., Su, Y., Nulsen, P., Randall, S. W., & Roediger, E. (2017). Uplift, Feedback, and Buoyancy: Radio Lobe Dynamics in NGC 4472. The Astrophysical journal, 848(1), 26. https://doi.org/10.3847/1538-4357/aa8a6f

© 2017. The American Astronomical Society. All rights reserved. We present results from deep (380 ks) Chandra observations of the active galactic nucleus (AGN) outburst in the massive early-type galaxy NGC 4472. We detect cavities in the gas coincide... Read More about Uplift, Feedback, and Buoyancy: Radio Lobe Dynamics in NGC 4472.

Stripped elliptical galaxies as probes of ICM physics : III. Deep Chandra observation of NGC 4552 - Measuring the viscosity of the intracluster medium (2017)
Journal Article
Kraft, R. P., Roediger, E., Machacek, M., Forman, W. R., Nulsen, P. E., Jones, C., Churazov, E., Randall, S., Su, Y., & Sheardown, A. (2017). Stripped elliptical galaxies as probes of ICM physics : III. Deep Chandra observation of NGC 4552 - Measuring the viscosity of the intracluster medium. The Astrophysical journal, 848(1), Article ARTN 27. https://doi.org/10.3847/1538-4357/aa8a6e

We present results from a deep (200 ks) Chandra observation of the early-type galaxy NGC 4552 (M89) which is falling into the Virgo cluster. Previous shallower X-ray observations of this galaxy showed a remnant gas core, a tail to the South of the ga... Read More about Stripped elliptical galaxies as probes of ICM physics : III. Deep Chandra observation of NGC 4552 - Measuring the viscosity of the intracluster medium.

The infall of the Virgo elliptical galaxy M60 toward M87 and the gaseous structures produced by Kelvin-Helmholtz instabilities (2017)
Journal Article
Wood, R. A., Jones, C., Machacek, M. E., Forman, W. R., Bogdan, A., Andrade-Santos, F., Kraft, R. P., Paggi, A., & Roediger, E. (2017). The infall of the Virgo elliptical galaxy M60 toward M87 and the gaseous structures produced by Kelvin-Helmholtz instabilities. The Astrophysical journal, 847(1), Article ARTN 79. https://doi.org/10.3847/1538-4357/aa8723

We present Chandra observations of hot gas structures, characteristic of gas stripping during infall, in the Virgo cluster elliptical galaxy M60 (NGC4649) located 1 Mpc east of M87. 0.5−2 keV Chandra X-ray images show a sharp leading edge in the surf... Read More about The infall of the Virgo elliptical galaxy M60 toward M87 and the gaseous structures produced by Kelvin-Helmholtz instabilities.

Deep Chandra observations of the stripped galaxy group falling into Abell 2142 (2017)
Journal Article
Eckert, D., Gaspari, M., Owers, M. S., Molendi, S., Gastaldello, F., Paltani, S., Ettori, S., Venturi, T., Rossetti, M., Rudnick, L., Roediger, E., Roediger, E., Eckert, D., Ettori, S., Gaspari, M., Gastaldello, F., Molendi, S., Owers, M., Paltani, S., Rossetti, M., …Venturi, T. (2017). Deep Chandra observations of the stripped galaxy group falling into Abell 2142. Astronomy and Astrophysics, 605(September), A25. https://doi.org/10.1051/0004-6361/201730555

In the local Universe, the growth of massive galaxy clusters mainly operates through the continuous accretion of group-scale systems. The infalling group in Abell 2142 is the poster child of such an accreting group, and as such, it is an ideal target... Read More about Deep Chandra observations of the stripped galaxy group falling into Abell 2142.

Molecular gas dominated 50 kpc ram pressure stripped tail of the Coma galaxy D100 (2017)
Journal Article
Jáchym, P., Sun, M., Kenney, J. D. P., Cortese, L., Combes, F., Yagi, M., Yoshida, M., Palouš, J., & Roediger, E. (2017). Molecular gas dominated 50 kpc ram pressure stripped tail of the Coma galaxy D100. The Astrophysical journal, 839(2), 114. https://doi.org/10.3847/1538-4357/aa6af5

We have discovered large amounts of molecular gas, as traced by CO emission, in the ram pressure stripped gas tail of the Coma cluster galaxy D100 (GMP 2910), out to large distances of about 50 kpc. D100 has a 60 kpc long, strikingly narrow tail whic... Read More about Molecular gas dominated 50 kpc ram pressure stripped tail of the Coma galaxy D100.

Chandra and JVLA Observations of HST Frontier Fields Cluster MACS J0717.5+3745 (2017)
Journal Article
van Weeren, R. J., Ogrean, G. A., Jones, C., Forman, W. R., Andrade-Santos, F., Pearce, C. J. J., Bonafede, A., Brüggen, M., Bulbul, E., Clarke, T. E., Churazov, E., David, L., Dawson, W. A., Donahue, M., Goulding, A., Kraft, R. P., Mason, B., Merten, J., Mroczkowski, T., Nulsen, P. E. J., …Zitrin, A. (2017). Chandra and JVLA Observations of HST Frontier Fields Cluster MACS J0717.5+3745. The Astrophysical journal, 835(2), 197. https://doi.org/10.3847/1538-4357/835/2/197

To investigate the relationship between thermal and non-thermal components in merger galaxy clusters, we present deep JVLA and Chandra observations of the HST Frontier Fields cluster MACS J0717.5+3745. The Chandra image shows a complex merger event,... Read More about Chandra and JVLA Observations of HST Frontier Fields Cluster MACS J0717.5+3745.

Capturing the 3D motion of an infalling galaxy via fluid dynamics (2017)
Journal Article
Su, Y., Kraft, R. P., Nulsen, P. E. J., Roediger, E., Forman, W. R., Churazov, E., Randall, S. W., Jones, C., & Machacek, M. E. (2017). Capturing the 3D motion of an infalling galaxy via fluid dynamics. The Astrophysical journal, 835(1), 19. https://doi.org/10.3847/1538-4357/835/1/19

The Fornax Cluster is the nearest galaxy cluster in the southern sky. NGC 1404 is a bright elliptical galaxy falling through the intracluster medium of the Fornax Cluster. The sharp leading edge of NGC 1404 forms a classical "cold front" that separat... Read More about Capturing the 3D motion of an infalling galaxy via fluid dynamics.

Deep Chandra observations of NGC 1404 : cluster plasma physics revealed by an infalling early-type galaxy (2017)
Journal Article
Kraft, R. P., Forman, W. R., Randall, S. W., Machacek, M. E., Roediger, E., Churazov, E., Forman, W., Jones, C., Kraft, R., Machacek, M., Nulsen, P., Randall, S., & Su, Y. (2017). Deep Chandra observations of NGC 1404 : cluster plasma physics revealed by an infalling early-type galaxy. The Astrophysical journal, 834(1), 74. https://doi.org/10.3847/1538-4357/834/1/74

The intracluster medium (ICM), as a magnetized and highly ionized fluid, provides an ideal laboratory to study plasma physics under extreme conditions that cannot yet be achieved on Earth. NGC 1404 is a bright elliptical galaxy that is being gas stri... Read More about Deep Chandra observations of NGC 1404 : cluster plasma physics revealed by an infalling early-type galaxy.

A textbook example of ram-pressure stripping in the Hydra A/A780 cluster (2016)
Journal Article
Roediger, E., De Grandi, S., Eckert, D., Gaspari, M., Gastaldello, F., Ghizzardi, S., Girardi, M., Molendi, S., Nonino, M., & Rossetti, M. (2016). A textbook example of ram-pressure stripping in the Hydra A/A780 cluster. Astronomy and Astrophysics, 592, A154. https://doi.org/10.1051/0004-6361/201526641

In the current epoch, one of the main mechanisms driving the growth of galaxy clusters is the continuous accretion of group-scale halos. In this process, the ram pressure applied by the hot intracluster medium on the gas content of the infalling grou... Read More about A textbook example of ram-pressure stripping in the Hydra A/A780 cluster.

Cold fronts: probes of plasma astrophysics in galaxy clusters (2016)
Journal Article
ZuHone, J. A., & Roediger, E. (2016). Cold fronts: probes of plasma astrophysics in galaxy clusters. Journal of Plasma Physics, 82(3), 535820301-1-535820301-48. https://doi.org/10.1017/s0022377816000544

The most massive baryonic component of galaxy clusters is the “intracluster medium” (ICM), a diffuse, hot, weakly magnetized plasma that is most easily observed in the X-ray band. Despite being observed for decades, the macroscopic transport properti... Read More about Cold fronts: probes of plasma astrophysics in galaxy clusters.

Frontier fields clusters: deep Chandra observations of the complex merger MACS~J1149.6+2223 (2016)
Journal Article
Ogrean, G. A., Van Weeren, R. J., Jones, C., Forman, W., Dawson, W. A., Golovich, N., Andrade-Santos, F., Murray, S. S., Nulsen, P., Roediger, E., Zitrin, A., Bulbul, E., Kraft, R., Goulding, A., Umetsu, K., Mroczkowski, T., Bonafede, A., Randall, S., Sayers, J., Churazov, E., …Ebeling, H. (2016). Frontier fields clusters: deep Chandra observations of the complex merger MACS~J1149.6+2223. The Astrophysical journal, 819(2), 113-1-113-13. https://doi.org/10.3847/0004-637X/819/2/113

The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal t... Read More about Frontier fields clusters: deep Chandra observations of the complex merger MACS~J1149.6+2223.

Jupiter's X-ray and EUV auroras monitored by Chandra, XXM-Newton, and Hisaki satellite (2016)
Journal Article
Badman, S. V., Branduardi-Raymont, G., Dunn, W. R., Elsner, R. F., Ezoe, Y., Fujimoto, M., Gladstone, G. R., Hasegawa, H., Kimura, T., Kraft, R. P., Masters, A., Murakami, G., Murray, S. S., Roediger, E., Tao, C., Tsuchiya, F., Vogt, M. F., Yamazaki, A., Yoshikawa, I., & Yoshioka, K. (2016). Jupiter's X-ray and EUV auroras monitored by Chandra, XXM-Newton, and Hisaki satellite. Journal of Geophysical Research: Space Physics, 121(3), 2308-2320. https://doi.org/10.1002/2015ja021893

Jupiter's X-ray auroral emission in the polar cap region results from particles which have undergone strong field-aligned acceleration into the ionosphere. The origin of precipitating ions and electrons and the time variability in the X-ray emission... Read More about Jupiter's X-ray and EUV auroras monitored by Chandra, XXM-Newton, and Hisaki satellite.

Shocking features in the merging galaxy cluster RXJ0334.2-0111 (2016)
Journal Article
Dasadia, S., Sun, M., Morandi, A., Sarazin, C., Clarke, T., Nulsen, P., Massaro, F., Roediger, E., Harris, D., & Forman, B. (2016). Shocking features in the merging galaxy cluster RXJ0334.2-0111. Monthly notices of the Royal Astronomical Society, 458(1), 681-694. https://doi.org/10.1093/mnras/stw291

© 2016 The Authors. We present a 66 ks Chandra X-ray observation of the galaxy cluster RXJ0334.2-0111. This deep observation revealed a unique bow shock system associated with a wide angle tail (WAT) radio galaxy and several intriguing substructures.... Read More about Shocking features in the merging galaxy cluster RXJ0334.2-0111.

The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra (2016)
Journal Article
van Weeren, R. J., Ogrean, G. A., Jones, C., Forman, W. R., Andrade-Santos, F., Bonafede, A., Brüggen, M., Bulbul, E., Clarke, T. E., Churazov, E., David, L., Dawson, W. A., Donahue, M., Goulding, A., Kraft, R. P., Mason, B., Merten, J., Mroczkowski, T., Murray, S. S., Nulsen, P. E. J., …Zitrin, A. (2016). The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra. The Astrophysical journal, 817(2), Article ARTN 98. https://doi.org/10.3847/0004-637x/817/2/98

© 2016. The American Astronomical Society. All rights reserved.. We report on high-resolution JVLA and Chandra observations of the Hubble Space Telescope (HST) Frontier Cluster MACS J0717.5+3745. MACS J0717.5+3745 offers the largest contiguous magnif... Read More about The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra.

Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters (2015)
Journal Article
McPartland, C., Ebeling, H., Roediger, E., & Blumenthal, K. (2016). Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters. Monthly notices of the Royal Astronomical Society, 455(3), 2994-3008. https://doi.org/10.1093/mnras/stv2508

We investigate the observational signatures and physical origin of ram-pressure stripping (RPS) in 63 massive galaxy clusters at z = 0.3–0.7, based on images obtained with the Hubble Space Telescope. Using a training set of a dozen ‘jellyfish’ galaxi... Read More about Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters.

Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky (2015)
Journal Article
Werner, N., ZuHone, J. A., Zhuravleva, I., Ichinohe, Y., Simionescu, A., Allen, S. W., Markevitch, M., Fabian, A. C., Keshet, U., Roediger, E., Ruszkowski, M., & Sanders, J. S. (2016). Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky. Monthly notices of the Royal Astronomical Society, 455(1), 846-858. https://doi.org/10.1093/mnras/stv2358

We present the results of a very deep (500 ks) Chandra observation, along with tailored numerical simulations, of the nearest, best resolved cluster cold front in the sky, which lies 90 kpc (19 arcmin) to the north-west of M 87. The northern part of... Read More about Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky.

Frontier fields clusters: Chandra and JVLA view of the pre-merging cluster MACS J0416.1-2403 (2015)
Journal Article
Ogrean, G. A., Weeren, R. J., Jones, C., Clarke, T. E., Sayers, J., Mroczkowski, T., Nulsen, P. E. J., Forman, W., Murray, S. S., Pandey-Pommier, M., Randall, S., Churazov, E., Bonafede, A., Kraft, R., David, L., Andrade-Santos, F., Merten, J., Zitrin, A., Umetsu, K., Goulding, A., …Vikhlinin, A. (2015). Frontier fields clusters: Chandra and JVLA view of the pre-merging cluster MACS J0416.1-2403. The Astrophysical journal, 812(2), 153. https://doi.org/10.1088/0004-637X/812/2/153

Merging galaxy clusters leave long-lasting signatures on the baryonic and non-baryonic cluster constituents, including shock fronts, cold fronts, X-ray substructure, radio halos, and offsets between the dark matter (DM) and the gas components. Using... Read More about Frontier fields clusters: Chandra and JVLA view of the pre-merging cluster MACS J0416.1-2403.

Stripped elliptical galaxies as probes of ICM physics: I. Tails, wakes, and flow patterns in and around stripped ellipticals (2015)
Journal Article
Roediger, E., Kraft, R. P., Nulsen, P. E. J., Forman, W. R., Machacek, M., Randall, S., Jones, C., Churazov, E., & Kokotanekova, R. (2015). Stripped elliptical galaxies as probes of ICM physics: I. Tails, wakes, and flow patterns in and around stripped ellipticals. The Astrophysical journal, 806(1), Article ARTN 103. https://doi.org/10.1088/0004-637X/806/1/103

Elliptical cluster galaxies are progressively stripped of their atmospheres due to their motion through the intra-cluster medium (ICM). Deep X-ray observations reveal the fine-structure of the galaxy's remnant atmosphere and its gas tail and wake. Th... Read More about Stripped elliptical galaxies as probes of ICM physics: I. Tails, wakes, and flow patterns in and around stripped ellipticals.

Stripped elliptical galaxies as probes of ICM physics: II. Stirred, but mixed? Viscous and inviscid gas stripping of the Virgo elliptical M89 (2015)
Journal Article
Roediger, E., Kraft, R. P., Nulsen, P. E. J., Forman, W. R., Machacek, M., Randall, S., Jones, C., Churazov, E., & Kokotanekova, R. (2015). Stripped elliptical galaxies as probes of ICM physics: II. Stirred, but mixed? Viscous and inviscid gas stripping of the Virgo elliptical M89. The Astrophysical journal, 806(1), 104. https://doi.org/10.1088/0004-637X/806/1/104

Elliptical galaxies moving through the intra-cluster medium (ICM) are progressively stripped of their gaseous atmospheres. X-ray observations reveal the structure of galactic tails, wakes, and the interface between the galactic gas and the ICM. This... Read More about Stripped elliptical galaxies as probes of ICM physics: II. Stirred, but mixed? Viscous and inviscid gas stripping of the Virgo elliptical M89.

Star formation in shocked cluster spirals and their tails (2014)
Journal Article
Roediger, E., Brüggen, M., Owers, M. S., Ebeling, H., & Sun, M. (2014). Star formation in shocked cluster spirals and their tails. Monthly notices of the Royal Astronomical Society. Letters, 443(1), L114-L118. https://doi.org/10.1093/mnrasl/slu087

Recent observations of ram pressure stripped spiral galaxies in clusters revealed details of the stripping process, i.e., the truncation of all interstellar medium (ISM) phases and of star formation (SF) in the disk, and multiphase star-forming tails... Read More about Star formation in shocked cluster spirals and their tails.

The narrow X-ray tail and double Hα tails of ESO 137-002 in A3627 (2013)
Journal Article
Zhang, B., Sun, M., Ji, L., Sarazin, C., Lin, X. B., Nulsen, P. E. J., Roediger, E., Donahue, M., Forman, W., Jones, C., Voit, G. M., & Kong, X. (2013). The narrow X-ray tail and double Hα tails of ESO 137-002 in A3627. The Astrophysical journal, 777(2), Article 122. https://doi.org/10.1088/0004-637x/777/2/122

We present the analysis of a deep Chandra observation of a ~2 L * late-type galaxy, ESO 137-002, in the closest rich cluster A3627. The Chandra data reveal a long (gsim40 kpc) and narrow tail with a nearly constant width (~3 kpc) to the southeast of... Read More about The narrow X-ray tail and double Hα tails of ESO 137-002 in A3627.

Viscous Kelvin-Helmholtz instabilities in highly ionised plasmas (2013)
Journal Article
Roediger, E., Kraft, R. P., Nulsen, P., Churazov, E., Forman, W., Brüggen, M., & Kokotanekova, R. (2013). Viscous Kelvin-Helmholtz instabilities in highly ionised plasmas. Monthly notices of the Royal Astronomical Society, 436(2), 1721-1740. https://doi.org/10.1093/mnras/stt1691

Transport coefficients in highly ionised plasmas like the intra-cluster medium (ICM) are still ill-constrained. They influence various processes, among them the mixing at shear flow interfaces due to the Kelvin-Helmholtz instability (KHI). The observ... Read More about Viscous Kelvin-Helmholtz instabilities in highly ionised plasmas.

Kelvin-Helmholtz instabilities at the sloshing cold fronts in the Virgo cluster as a measure for the effective ICM viscosity (2013)
Journal Article
Roediger, E., Kraft, R. P., Forman, W. R., E. J. Nulsen, P., & Churazov, E. (2013). Kelvin-Helmholtz instabilities at the sloshing cold fronts in the Virgo cluster as a measure for the effective ICM viscosity. The Astrophysical journal, 764(1), Article 60. https://doi.org/10.1088/0004-637X/764/1/60

Sloshing cold fronts (CFs) arise from minor merger triggered gas sloshing. Their detailed structure depends on the properties of the intra-cluster medium (ICM): hydrodynamical simulations predict the CFs to be distorted by Kelvin-Helmholtz instabilit... Read More about Kelvin-Helmholtz instabilities at the sloshing cold fronts in the Virgo cluster as a measure for the effective ICM viscosity.