Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky

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.

doi:10.1093/mnras/stv2358

Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937 (2016)
Journal Article
Sneden, C., Cowan, J. J., Kobayashi, C., Pignatari, M., Lawler, J. E., Den Hartog, E. A., & Wood, M. P. (2016). Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937. The Astrophysical journal, 817(1), 53. https://doi.org/10.3847/0004-637x/817/1/53

We have derived new, very accurate abundances of the Fe-group elements Sc through Zn (Z = 21−30) in the bright main-sequence turnoff star HD 84937 based on high-resolution spectra covering the visible and ultraviolet spectral regions. New or recent l... Read More about Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937.

Weighing the galactic disc using the Jeans equation: lessons from simulations (2016)
Journal Article
Candlish, G. N., Smith, R., Moni Bidin, C., & Gibson, B. K. (2016). Weighing the galactic disc using the Jeans equation: lessons from simulations. Monthly notices of the Royal Astronomical Society, 456(4), 3456-3474. https://doi.org/10.1093/mnras/stv2792

Using three-dimensional stellar kinematic data from simulated galaxies, we examine the efficacy of a Jeans equation analysis in reconstructing the total disk surface density, including the dark matter, at the ‘Solar’ radius. Our simulation data set i... Read More about Weighing the galactic disc using the Jeans equation: lessons from simulations.

Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun (2016)
Journal Article
Lugaro, M., Pignatari, M., Ott, U., Zuber, K., Travaglio, C., Gyürky, G., & Fülöp, Z. (2016). Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun. Proceedings of the National Academy of Sciences of the United States of America, 113(4), 907-912. https://doi.org/10.1073/pnas.1519344113

The abundances of ⁹²Nb and ¹⁴⁶Sm in the early solar system are determined from meteoritic analysis, and their stellar production is attributed to the p process. We investigate if their origin from thermonuclear supernovae deriving from the explosion... Read More about Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun.

The history of stellar metallicity in a simulated disc galaxy (2016)
Journal Article
Snaith, O. N., Bailin, J., Gibson, B. K., Bell, E. F., Stinson, G., Valluri, M., Wadsley, J., & Couchman, H. (2016). The history of stellar metallicity in a simulated disc galaxy. Monthly notices of the Royal Astronomical Society, 456(3), 3119-3141. https://doi.org/10.1093/mnras/stv2788

We explore the chemical distribution of stars in a simulated galaxy. Using simulations of the same initial conditions but with two different feedback schemes (McMaster Unbiased Galaxy Simulations – MUGS – and Making Galaxies in a Cosmological Context... Read More about The history of stellar metallicity in a simulated disc galaxy.

Experiments with neutron beams for the astrophysical s process (2016)
Journal Article
Lederer, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., …Žugec, P. (2016). Experiments with neutron beams for the astrophysical s process. Journal of Physics: Conference Series, 665(1), 012020. https://doi.org/10.1088/1742-6596/665/1/012020

© Published under licence by IOP Publishing Ltd. Neutron capture cross sections are the key nuclear physics input to study the slow neutron capture process, which is responsible for forming about half of the elemental abundances above Fe. Stellar neu... Read More about Experiments with neutron beams for the astrophysical s process.

Sensitivity study for s process nucleosynthesis in AGB stars (2016)
Journal Article
Koloczek, A., Thomas, B., Glorius, J., Plag, R., Pignatari, M., Reifarth, R., Ritter, C., Schmidt, S., & Sonnabend, K. (2016). Sensitivity study for s process nucleosynthesis in AGB stars. Atomic Data and Nuclear Data Tables, 108(March), 1-14. https://doi.org/10.1016/j.adt.2015.12.001

In this paper we present a large-scale sensitivity study of reaction rates in the main component of the s process. The aim of this study is to identify all rates, which have a global effect on the s process abundance distribution and the three most i... Read More about Sensitivity study for s process nucleosynthesis in AGB stars.

Feedback control in quantum transport (2016)
Book Chapter
Emary, C. (2016). Feedback control in quantum transport. In Understanding Complex Systems; Control of Self-Organizing Nonlinear Systems (275-287). Control of Self-Organizing Nonlinear Systems: Springer International Publishing. https://doi.org/10.1007/978-3-319-28028-8_14

Quantum transport is the study of the motion of electrons through nano-scale structures small enough that quantum effects are important. In this contribution I review recent theoretical proposals to use the techniques of quantum feedback control to m... Read More about Feedback control in quantum transport.

Galactic archaeology and minimum spanning trees (2015)
Book Chapter
MacFarlane, B. A., Gibson, B. K., & Flynn, C. M. L. (2015). Galactic archaeology and minimum spanning trees. In I. Skillen, M. Balcells, & S. Trager (Eds.), Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys, and Wide Fields (79-83). Astronomical Society of the Pacific

Chemical tagging of stellar debris from disrupted open clusters and associations underpins the science cases for next-generation multi-object spectroscopic surveys. As part of the Galactic Archaeology project TraCD (Tracking Cluster Debris), a prelim... Read More about Galactic archaeology and minimum spanning trees.

s-process production in rotating massive stars at solar and low metallicities (2015)
Journal Article
Frischknecht, U., Hirschi, R., Pignatari, M., Maeder, A., Meynet, G., Chiappini, C., Thielemann, F.-K., Rauscher, T., Georgy, C., & Ekström, S. (2016). s-process production in rotating massive stars at solar and low metallicities. Monthly notices of the Royal Astronomical Society, 456(2), 1803-1825. https://doi.org/10.1093/mnras/stv2723

Rotation was shown to have a strong impact on the structure and light element nucleosynthesis in massive stars. In particular, models including rotation can reproduce the primary nitrogen observed in halo extremely metal poor (EMP) stars. Additional... Read More about s-process production in rotating massive stars at solar and low metallicities.

The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes (2015)
Journal Article
Beare, R., Brown, M. J. I., Pimbblet, K., Bian, F., & Lin, Y.-T. (2015). The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes. The Astrophysical journal, 815(2), https://doi.org/10.1088/0004-637x/815/2/94

Using a sample of ~410,000 galaxies to a depth of IAB=24 over 8.26 deg2 in the Boötes field (~10 times larger than the z~1 luminosity function (LF) studies in the prior literature), we have accurately measured the evolving B-band LF of red galaxies a... Read More about The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes.

Modern yields per stellar generation: the effect of the IMF (2015)
Journal Article
Vincenzo, F., Matteucci, F., Belfiore, F., & Maiolino, R. (2016). Modern yields per stellar generation: the effect of the IMF. Monthly notices of the Royal Astronomical Society, 455(4), 4183–4190. https://doi.org/10.1093/mnras/stv2598

Gaseous and stellar metallicities in galaxies are nowadays routinely used to constrain the evolutionary processes in galaxies. This requires the knowledge of the average yield per stellar generation, $y_{\text{Z}}$, i.e. the quantity of metals that a... Read More about Modern yields per stellar generation: the effect of the IMF.

H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis (2015)
Journal Article
Jones, S., Ritter, C., Herwig, F., Fryer, C., Pignatari, M., Bertolli, M. G., & Paxton, B. (2016). H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis. Monthly notices of the Royal Astronomical Society, 455(4), 3848-3863. https://doi.org/10.1093/mnras/stv2488

We investigate the evolution of super-AGB (SAGB) thermal pulse (TP) stars for a range of metallicities (Z) and explore the effect of convective boundary mixing (CBM). With decreasing metallicity and evolution along the TP phase, the He-shell flash an... Read More about H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis.

Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget (2015)
Journal Article
Driver, S. P., Wright, A. H., Andrews, S. K., Davies, L. J., Kafle, P. R., Lange, R., Moffett, A. J., Mannering, E., Robotham, A. S. G., Vinsen, K., Alpaslan, M., Andrae, E., Baldry, I. K., Bauer, A. E., Bamford, S. P., Bland-Hawthorn, J., Bourne, N., Brough, S., Brown, M. J. I., Cluver, M. E., …Williams, R. (2016). Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget. Monthly notices of the Royal Astronomical Society, 455(4), 3911-3942. https://doi.org/10.1093/mnras/stv2505

We present the Galaxy And Mass Assembly (GAMA) Panchromatic Data Release (PDR) constituting over 230 deg2 of imaging with photometry in 21 bands extending from the far-UV to the far-IR. These data complement our spectroscopic campaign of over 300k ga... Read More about Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget.

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.

Feedback from massive stars and gas expulsion from proto-globular clusters (2015)
Journal Article
Calura, F., Few, C. G., Romano, D., & D'Ercole, A. (2015). Feedback from massive stars and gas expulsion from proto-globular clusters. Astrophysical journal. Letters, 814(1), Article ARTN L14. https://doi.org/10.1088/2041-8205/814/1/L14

© 2015. The American Astronomical Society. All rights reserved. Globular clusters (GCs) are considerably more complex structures than previously thought, harboring at least two stellar generations that present clearly distinct chemical abundances. Sc... Read More about Feedback from massive stars and gas expulsion from proto-globular clusters.

On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares (2015)
Journal Article
Zharkov, S., & Zharkova, V. (2015). On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares. Solar Physics, 290(11), 3163-3188. https://doi.org/10.1007/s11207-015-0813-x

Observations of solar flares with sunquakes by space- and ground-based instruments reveal essentially different dynamics of seismic events in different flares. Some sunquakes are found to be closely associated with the locations of hard X-ray (HXR) a... Read More about On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares.

A statistical correlation of sunquakes based on their seismic and white-light emission (2015)
Journal Article
Buitrago-Casas, J. C., Martínez Oliveros, J. C., Lindsey, C., Calvo-Mozo, B., Krucker, S., Glesener, L., & Zharkov, S. (2015). A statistical correlation of sunquakes based on their seismic and white-light emission. Solar Physics, 290(11), 3151-3162. https://doi.org/10.1007/s11207-015-0786-9

Several mechanisms have been proposed to explain the transient seismic emission, i.e. “sunquakes,” from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged particles and the... Read More about A statistical correlation of sunquakes based on their seismic and white-light emission.

Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switching (2015)
Journal Article
Atxitia, U., Ostler, T. A., Chantrell, R. W., & Chubykalo-Fesenko, O. (2015). Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switching. Applied physics letters, 107(19), Article 192402. https://doi.org/10.1063/1.4935416

Using large-scale computer simulations, we thoroughly study the minimum energy required to thermally induced magnetization switching (TIMS) after the application of a femtosecond heat pulse in transition metal-rare earth ferrimagnetic alloys. We find... Read More about Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switching.

Localized surface plasmon effects in ZnO sandwiched gold nanoparticles under fs pumping (2015)
Presentation / Conference Contribution
Bongu, S. R., Bisht, P. B., Namboodri, R. C., Ali, S. A., Kelly, T. J., Costello, J. T., Patra, A., & Kasiviswanathan, S. (2015, October). Localized surface plasmon effects in ZnO sandwiched gold nanoparticles under fs pumping. Presented at 2015 IEEE Photonics Conference, IPC 2015

Nonlinear optical properties of gold nanoparticles (AuNPs) embedded ZnO thin films have been studied at 400 nm. While the AuNPs thin film shows the effect of saturable absorption, AuNPs embedded ZnO film exhibits the RSA behaviour.

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.

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