All Outputs (756)

Galaxy chemical evolution models: The role of molecular gas formation (2017)
Journal Article
Mollá, M., Díaz, Á. I., Ascasibar, Y., & Gibson, B. K. (2017). Galaxy chemical evolution models: The role of molecular gas formation. Monthly notices of the Royal Astronomical Society, 468(1), 305-318. https://doi.org/10.1093/mnras/stx419

In our classical grid of multiphase chemical evolution models, star formation in the disc occurs in two steps: first, molecular gas forms, and then stars are created by cloud-cloud collisions or interactions of massive stars with the surrounding mole... Read More about Galaxy chemical evolution models: The role of molecular gas formation.

Neutron spectroscopy of 26 Mg states: Constraining the stellar neutron source 22 Ne( α , n ) 25 Mg (2017)
Journal Article
Kivel, N., Karadimos, D., Käppeler, F., Kadi, Y., Krtička, M., Kopecky, S., Kokkoris, M., Koehler, P., Leal-Cidoncha, E., Langer, C., Lampoudis, C., Kroll, J., Losito, R., Lo Meo, S., Leeb, H., Lederer, C., Mastromarco, M., Martínez, T., Marganiec, J., Manousos, A., …Schillebeeckx, P. (2017). Neutron spectroscopy of 26 Mg states: Constraining the stellar neutron source 22 Ne( α , n ) 25 Mg. Physics letters. B, 768, 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

This work reports on accurate, high-resolution measurements of the 25 Mg(n,γ) 26 Mg and 25 Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25 Mg(n,γ) 26 Mg parametrization. The r... Read More about Neutron spectroscopy of 26 Mg states: Constraining the stellar neutron source 22 Ne( α , n ) 25 Mg.

Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer (2017)
Book Chapter
Verrelli, E., & Tsoukalas, D. (2017). Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer. In P. Dimitrakis (Ed.), Charge-Trapping Non-Volatile Memories (157-210). Springer. https://doi.org/10.1007/978-3-319-48705-2_5

Nanoparticles (NPs) are of great scientific interest as they are effectively a bridge between bulk materials and atomic or molecular structures. In this work the focus is to present results concerning the use of NPs deposited using a novel room tempe... Read More about Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer.

NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C (2017)
Journal Article
Hoppe, P., Pignatari, M., Kodolányi, J., Gröner, E., & Amari, S. (2018). NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C. Geochimica et cosmochimica acta, 221, 182-199. https://doi.org/10.1016/j.gca.2017.01.051

© 2017 Elsevier Ltd. We have conducted a NanoSIMS ion imaging survey of about 1800 presolar silicon carbide (SiC) grains from the Murchison meteorite. A total of 21 supernova (SN) X grains, two SN C grains, and two putative nova grains were identifie... Read More about NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C.

Stellar (n,γ) cross sections of ²³Na (2017)
Journal Article
Uberseder, E., Heil, M., Käppeler, F., Lederer, C., Mengoni, A., Bisterzo, S., Pignatari, M., & Wiescher, M. (2017). Stellar (n,γ) cross sections of ²³Na. Physical Review C, 95(2), 025803. https://doi.org/10.1103/PhysRevC.95.025803

The cross section of the ²³Na(n,γ)²⁴Na reaction has been measured via the activation method at the Karlsruhe 3.7 MV Van de Graaff accelerator. NaCl samples were exposed to quasistellar neutron spectra at kT = 5.1 and 25 keV produced via the ¹⁸O(p,n)¹... Read More about Stellar (n,γ) cross sections of ²³Na.

Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films (2017)
Journal Article
Ostler, T. A., Barton, C., Thomson, T., & Hrkac, G. (2017). Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films. Physical Review B, 95(6), Article 064415. https://doi.org/10.1103/PhysRevB.95.064415

FeRh and its first-order phase transition can open new routes for magnetic hybrid materials and devices under the assumption that it can be exploited in ultra-thin-film structures. Motivated by experimental measurements showing an unexpected increase... Read More about Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films.

Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging (2017)
Journal Article
Eling, C. J., Price, T. W., Marshall, A. R. L., Narda Viscomi, F., Robinson, P., Firth, G., Adawi, A. M., Bouillard, J.-S. G., & Stasiuk, G. J. (2017). Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging. ChemPlusChem, 82(5), 674-680. https://doi.org/10.1002/cplu.201600593

A novel SERS/fluorescent multimodal imaging probe for mitochondria has been synthesised using 12 nm diameter gold nanoparticles (AuNP) surface functionalised with a rhodamine thiol derivative ligand. The normal pH dependant acidic fluorescence of the... Read More about Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging.

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.

A study of central galaxy rotation with stellar mass and environment (2017)
Journal Article
Lara-Lopez, M. A., Lopez-Sanchez, A. R., Oliva-Altamirano, P., Brough, S., Tran, K.-V., Jimmy, Miller, C., Bremer, M. N., Phillipps, S., Sharp, R., Colless, M., Lara-López, M. A., López-Sánchez, Á. R., Pimbblet, K., Kafle, P. R., & Couch, W. J. (2017). A study of central galaxy rotation with stellar mass and environment. The Astronomical journal, 153(2), 89. https://doi.org/10.3847/1538-3881/153/2/89

© 2017. The American Astronomical Society. All rights reserved. We present a pilot analysis of the influence of galaxy stellar mass and cluster environment on the probability of slow rotation in 22 central galaxies at mean redshift z = 0.07. This inc... Read More about A study of central galaxy rotation with stellar mass and environment.

Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood (2017)
Journal Article
Žerjal, M., Zwitter, T., Matijevič, G., Grebel, E. K., Kordopatis, G., Munari, U., Seabroke, G., Steinmetz, M., Wojno, J., Bienaymé, O., Bland-Hawthorn, J., Conrad, C., Freeman, K. C., Gibson, B. K., Gilmore, G., Kunder, A., Navarro, J., Parker, Q. A., Reid, W., Siviero, A., …Wyse, R. F. G. (2017). Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood. The Astrophysical journal, 835(1), 61. https://doi.org/10.3847/1538-4357/835/1/61

A large sample of over 38,000 chromospherically active candidate solar-like stars and cooler dwarfs from the RAVE survey is addressed in this paper. An improved activity identification with respect to the previous study was introduced to build a cata... Read More about Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood.

The Radial Velocity Experiment (RAVE): fifth data release (2017)
Journal Article
Kunder, A., Kordopatis, G., Steinmetz, M., Zwitter, T., McMillan, P. J., Casagrande, L., Enke, H., Wojno, J., Valentini, M., Chiappini, C., Matijevič, G., Siviero, A., De Laverny, P., Recio-Blanco, A., Bijaoui, A., Wyse, R. F. G., Binney, J., Grebel, E. K., Helmi, A., Jofre, P., …Mosser, B. (2017). The Radial Velocity Experiment (RAVE): fifth data release. Astronomical Journal, 153(2), 75. https://doi.org/10.3847/1538-3881/153/2/75

Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9 < I < 12) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra (R ∼ 7500) covering the Ca-... Read More about The Radial Velocity Experiment (RAVE): fifth data release.

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.

i-process Nucleosynthesis and Mass Retention Efficiency in He-shell Flash Evolution of Rapidly Accreting White Dwarfs (2017)
Journal Article
Denissenkov, P. A., Herwig, F., Battino, U., Ritter, C., Pignatari, M., Jones, S., & Paxton, B. (2017). i-process Nucleosynthesis and Mass Retention Efficiency in He-shell Flash Evolution of Rapidly Accreting White Dwarfs. Astrophysical journal. Letters, 834(2), L10. https://doi.org/10.3847/2041-8213/834/2/l10

© 2017. The American Astronomical Society. All rights reserved. Based on stellar evolution simulations, we demonstrate that rapidly accreting white dwarfs (WDs) in close binary systems are an astrophysical site for the intermediate neutron-capture pr... Read More about i-process Nucleosynthesis and Mass Retention Efficiency in He-shell Flash Evolution of Rapidly Accreting White Dwarfs.

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.

Time resolved anisotropic emission from an aluminium laser produced plasma (2017)
Journal Article
Wubetu, G. A., Fiedorowicz, H., Costello, J. T., & Kelly, T. J. (2017). Time resolved anisotropic emission from an aluminium laser produced plasma. Physics of Plasmas, 24(1), 013105. https://doi.org/10.1063/1.4973444

The polarisation anisotropy of the emission from a laser produced aluminium plasma has been studied using time and polarisation resolved spectroscopy at various background pressures of air. A Wollaston prism was used to resolve the emission from the... Read More about Time resolved anisotropic emission from an aluminium laser produced plasma.

A simple and general method for solving detailed chemical evolution with delayed production of iron and other chemical elements (2016)
Journal Article
Vincenzo, F., Matteucci, F., & Spitoni, E. (2017). A simple and general method for solving detailed chemical evolution with delayed production of iron and other chemical elements. Monthly notices of the Royal Astronomical Society, 466(3), 2939–2947. https://doi.org/10.1093/mnras/stw3369

We present a theoretical method for solving the chemical evolution of galaxies, by assuming an instantaneous recycling approximation for chemical elements restored by massive stars and the Delay Time Distribution formalism for the delayed chemical en... Read More about A simple and general method for solving detailed chemical evolution with delayed production of iron and other chemical elements.

Evidence for HI replenishment in massive galaxies through gas accretion from the cosmic web (2016)
Journal Article
Kleiner, D., Pimbblet, K. A., Heath Jones, D., Koribalski, B. S., & Serra, P. (2017). Evidence for HI replenishment in massive galaxies through gas accretion from the cosmic web. Monthly notices of the Royal Astronomical Society, 466(4), 4692-4710. https://doi.org/10.1093/mnras/stw3328

We examine the H i -to-stellar mass ratio (H i fraction) for galaxies near filament backbones within the nearby Universe (d < 181 Mpc). This work uses the 6 degree Field Galaxy Survey (6dFGS) and the Discrete Persistent Structures Extractor (DisPerSE... Read More about Evidence for HI replenishment in massive galaxies through gas accretion from the cosmic web.

Atomic “bomb testing”: the Elitzur–Vaidman experiment violates the Leggett–Garg inequality (2016)
Journal Article
Robens, C., Alt, W., Emary, C., Meschede, D., & Alberti, A. (2017). Atomic “bomb testing”: the Elitzur–Vaidman experiment violates the Leggett–Garg inequality. Applied physics. B, Lasers and optics, 123(1), Article 12. https://doi.org/10.1007/s00340-016-6581-y

Elitzur and Vaidman have proposed a measurement scheme that, based on the quantum superposition principle, allows one to detect the presence of an object—in a dramatic scenario, a bomb—without interacting with it. It was pointed out by Ghirardi that... Read More about Atomic “bomb testing”: the Elitzur–Vaidman experiment violates the Leggett–Garg inequality.

The evolution of the radial gradient of oxygen abundance in spiral galaxies (2016)
Preprint / Working Paper
Mollá, M., Díaz, Á., Ascasibar, Y., Gibson, B., Cavichia, O., Costa, R. D. D. D., & Maciel, W. J. The evolution of the radial gradient of oxygen abundance in spiral galaxies

The aim of this work is to present our new series of chemical evolution models computed for spiral and low mass galaxies of different total masses and star formation efficiencies. We analyze the results of models, in particular the evolution of the r... Read More about The evolution of the radial gradient of oxygen abundance in spiral galaxies.

Galaxy and Mass Assembly (GAMA): active galactic nuclei in pairs of galaxies (2016)
Journal Article
Gordon, Y. A., Owers, M. S., Pimbblet, K. A., Croom, S. M., Alpaslan, M., Baldry, I. K., Brough, S., Brown, M. J., Cluver, M. E., Conselice, C. J., Davies, L. J., Holwerda, B. W., Hopkins, A. M., Gunawardhana, M. L., Loveday, J., Taylor, E. N., & Wang, L. (2017). Galaxy and Mass Assembly (GAMA): active galactic nuclei in pairs of galaxies. Monthly notices of the Royal Astronomical Society, 465(3), 2671-2686. https://doi.org/10.1093/mnras/stw2925

There exist conflicting observations on whether or not the environment of broad and narrow line AGN differ and this consequently questions the validity of the AGN unification model. The high spectroscopic completeness of the GAMA survey makes it idea... Read More about Galaxy and Mass Assembly (GAMA): active galactic nuclei in pairs of galaxies.