Showing 2017 · astro-ph.GAShow all

96 papers · 2 filters

astro-ph.GA2017★ 31 cited

Cosmic CARNage I: on the calibration of galaxy formation models

Alexander Knebe, Frazer R. Pearce, Violeta Gonzalez-Perez +31

We present a comparison of nine galaxy formation models, eight semi-analytical and one halo occupation distribution model, run on the same underlying cold dark matter simulation (c…

astro-ph.GA2017★ 5 cited

Large scale correlations in gas traced by MgII absorbers around low mass galaxies

Guinevere Kauffmann

The physical origin of the large-scale conformity in the colours and specific star formation rates of isolated low mass central galaxies and their neighbours on scales in excess of…

astro-ph.GA2017★ 87 cited

The dependence of cosmic ray driven galactic winds on halo mass

Svenja Jacob, Rüdiger Pakmor, Christine M. Simpson +2

Galactic winds regulate star formation in disk galaxies and help to enrich the circum-galactic medium. They are therefore crucial for galaxy formation, but their driving mechanism…

astro-ph.GA2017★ 33 cited

The evolution of young HII regions

P. D. Klaassen, K. G. Johnston, J. S. Urquhart +6

High-mass stars form in much richer environments than those associated with isolated low-mass stars, and once they reach a certain mass, produce ionised (HII) regions. The formatio…

astro-ph.GA2017★ 119 cited

Halo Substructure in the SDSS-Gaia Catalogue : Streams and Clumps

G. C. Myeong, N. W. Evans, V. Belokurov +2

We use the SDSS-Gaia Catalogue to identify six new pieces of halo substructure. SDSS-Gaia is an astrometric catalogue that exploits SDSS data release 9 to provide first epoch photo…

astro-ph.GA2017★ 89 cited

AGN Feedback Compared: Jets versus Radiation

S. Cielo, R. Bieri, M. Volonteri +2

Feedback by Active Galactic Nuclei is often divided into quasar and radio mode, powered by radiation or radio jets, respectively. Both are fundamental in galaxy evolution, especial…

astro-ph.GA2017★ 14 cited

FUV line emission, gas kinematics, and discovery of [Fe XXI] 1354.1 in the sightline towards a filament in M87

Michael E. Anderson, Rashid Sunyaev

We present new HST-COS G130M spectroscopy for a sightline toward a filament projected 1.9 kpc from the nucleus of M87. The combination of the sensitivity of COS and the proximity o…

astro-ph.GA2017★ 83 cited

Merger-Induced Metallicity Dilution in Cosmological Galaxy Formation Simulations

Sebastian Bustamante, Martin Sparre, Volker Springel +1

Observational studies have revealed that galaxy pairs tend to have lower gas-phase metallicity than isolated galaxies. This metallicity deficiency can be caused by inflows of low-m…

astro-ph.GA2017★ 35 cited

How do stars affect DM halos?

James H. H. Chan, Hsi-Yu Schive, Tak-Pong Woo +1

Wave dark matter (DM) predicts a compact soliton core and a granular halo in every galaxy. This work presents the first simulation study of an elliptical galaxy by including bot…

astro-ph.GA2017★ 192 cited

The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG

Dylan Nelson, Guinevere Kauffmann, Annalisa Pillepich +8

We explore the abundance, spatial distribution, and physical properties of the OVI, OVII, and OVIII ions of oxygen in circumgalactic and intergalactic media (the CGM, IGM, and WHIM…

astro-ph.GA2017★ 114 cited

Similar star formation rate and metallicity evolution timescales drive the fundamental metallicity relation

Paul Torrey, Mark Vogelsberger, Lars Hernquist +10

The fundamental metallicity relation (FMR) is a postulated correlation between galaxy stellar mass, star formation rate (SFR), and gas-phase metallicity. At its core, this relation…

astro-ph.GA2017★ 25 cited

The Stripe 82 Massive Galaxy Project III: A Lack of Growth Among Massive Galaxies

Kevin Bundy, Alexie Leauthaud, Shun Saito +3

The average stellar mass (Mstar) of high-mass galaxies (Mstar > 3e11 Msun) is expected to grow by ~30% since z~1, largely through ongoing mergers that are also invoked to explain t…

astro-ph.GA2017★ 19 cited

Clustering Constraints on the Relative Sizes of Central and Satellite Galaxies

Andrew Hearin, Peter Behroozi, Andrey Kravtsov +1

We empirically constrain how galaxy size relates to halo virial radius using new measurements of the size- and stellar mass-dependent clustering of galaxies in the Sloan Digital Sk…

astro-ph.GA2017★ 10 cited

Increased Prevalence of Bent Lobes for Double-Lobed Radio Galaxies in Dense Environments

Ezekiel M. Silverstein, Michael E. Anderson, Joel N. Bregman

Double-lobed radio galaxies (DLRGs) often have radio lobes which subtend an angle of less than 180 degrees, and these bent DLRGs have been shown to associate preferentially with ga…

astro-ph.GA2017★ 221 cited

The evolution of the mass-metallicity relation in IllustrisTNG

Paul Torrey, Mark Vogelsberger, Federico Marinacci +8

The coevolution of galaxies and their metal content serves as an important test for galaxy feedback models. We analyze the distribution and evolution of metals within the Illustris…

astro-ph.GA2017★ 4 cited

The Physical Properties of Galaxies with Unusually Red Mid-Infrared Colours

Guinevere Kauffmann

The goal of this paper is to investigate the physical nature of galaxies in the redshift range that have strong excess emission at mid-IR wavelengths and to determine…

astro-ph.GA2017★ 47 cited

S0 galaxies are faded spirals: clues from their angular momentum content

Francesca Rizzo, Filippo Fraternali, Giuliano Iorio

The distribution of galaxies in the stellar specific angular momentum versus stellar mass plane (-) provides key insights into their formation mechanisms. In…

astro-ph.GA2017★ 23 cited

Declining rotation curves at in CDM galaxy formation simulations

Adelheid F. Teklu, Rhea-Silvia Remus, Klaus Dolag +4

Selecting disk galaxies from the cosmological, hydrodynamical simulation Magneticum Pathfinder we show that almost half of our poster child disk galaxies at show significantl…

astro-ph.GA2017★ 22 cited

Mass density slope of elliptical galaxies from strong lensing and resolved stellar kinematics

Natalia Lyskova, Eugene Churazov, Thorsten Naab

We discuss constraints on the mass density distribution (parameterized as ) in early-type galaxies provided by strong lensing and stellar kinematics data. The cons…

astro-ph.GA2017★ 72 cited

The Circum-Galactic Medium of MASsive Spirals II: Probing the Nature of Hot Gaseous Halo around the Most Massive Isolated Spiral Galaxies

Jiang-Tao Li, Joel N. Bregman, Q. Daniel Wang +3

We present the analysis of the XMM-Newton data of the Circum-Galactic Medium of MASsive Spirals (CGM-MASS) sample of six extremely massive spiral galaxies in the local Universe. Al…

astro-ph.GA2017★ 467 cited

Supermassive black holes and their feedback effects in the IllustrisTNG simulation

Rainer Weinberger, Volker Springel, Rüdiger Pakmor +8

We study the population of supermassive black holes (SMBHs) and their effects on massive central galaxies in the IllustrisTNG cosmological hydrodynamical simulations of galaxy form…

astro-ph.GA2017★ 5 cited

Decoupled Black Hole Accretion and Quenching: The Relationship Between BHAR, SFR, and Quenching in Milky Way and Andromeda-mass Progenitors Since z = 2.5

Michael J. Cowley, Lee R. Spitler, Ryan F. Quadri +13

We investigate the relationship between the black hole accretion rate (BHAR) and star-formation rate (SFR) for Milky Way (MW) and Andromeda (M31)-mass progenitors from z = 0.2 - 2.…

astro-ph.GA2017★ 72 cited

AGN Populations in Large Volume X-ray Surveys: Photometric Redshifts and Population Types found in the Stripe 82X Survey

Tonima Tasnim Ananna, Mara Salvato, Stephanie LaMassa +16

Multi-wavelength surveys covering large sky volumes are necessary to obtain an accurate census of rare objects such as high luminosity and/or high redshift active galactic nuclei (…

astro-ph.GA2017★ 231 cited

The Influence of Sagittarius and the Large Magellanic Cloud on the Milky Way Galaxy

Chervin F. P. Laporte, Kathryn V. Johnston, Facundo A. Gómez +2

We present N-body simulations of a Sagittarius-like dwarf spheroidal galaxy (Sgr) that follow its orbit about the Milky Way (MW) since its first crossing of the Galaxy's virial rad…