Showing 2016 · astro-ph.GAShow all

59 papers · 2 filters

astro-ph.GA2016★ 721 cited

Theoretical Challenges in Galaxy Formation

Thorsten Naab, Jeremiah P. Ostriker

Numerical simulations have become a major tool for understanding galaxy formation and evolution. Over the decades the field has made significant progress. It is now possible to sim…

astro-ph.GA2016★ 32 cited

The Galaxy--Halo Connection in High-Redshift Universe: Details and Evolution of Stellar-to-Halo Mass Ratios of Lyman Break Galaxies on CFHTLS Deep Fields

Shogo Ishikawa, Nobunari Kashikawa, Jun Toshikawa +5

We present the results of clustering analyses of Lyman break galaxies (LBGs) at , , and using the final data release of the Canada--France--Hawaii Telescope Legacy S…

astro-ph.GA2016★ 9 cited

Implications of galaxy buildup for putative IMF variations in massive galaxies

Kirsten Blancato, Shy Genel, Greg Bryan

Recent observational evidence for initial mass function (IMF) variations in massive quiescent galaxies at challenges the long-established paradigm of a universal IMF. While…

astro-ph.GA2016★ 23 cited

An Introduction to Gas Accretion onto Galaxies

M. E. Putman

Evidence for gas accretion onto galaxies can be found throughout the universe. In this chapter, I summarize the direct and indirect signatures of this process and discuss the prima…

astro-ph.GA2016★ 47 cited

HST/COS Observations of Ionized Gas Accretion at the Disk-halo Interface of M33

Y. Zheng, J. E. G. Peek, J. K. Werk +1

We report the detection of accreting ionized gas at the disk-halo interface of the nearby galaxy M33. We analyze HST/COS absorption-line spectra of seven ultraviolet-bright stars e…

astro-ph.GA2016★ 105 cited

The Complete Infrared View of Active Galactic Nuclei from the 70-month Swift/BAT Catalog

Kohei Ichikawa, Claudio Ricci, Yoshihiro Ueda +5

We systematically investigate the near- (NIR) to far-infrared (FIR) photometric properties of a nearly complete sample of local active galactic nuclei (AGN) detected in the Swift/B…

astro-ph.GA2016★ 80 cited

AGN Heating in Simulated Cool-Core Clusters

Yuan Li, Mateusz Ruszkowski, Greg L. Bryan

We analyze heating and cooling processes in an idealized simulation of a cool-core cluster, where momentum-driven AGN feedback balances radiative cooling in a time-averaged sense.…

astro-ph.GA2016★ 3 cited

OVI Emission From the Supernovae-regulated Interstellar Medium: Simulation Vs Observation

Miao Li, Greg Bryan, Jeremiah P. Ostriker

The OVI 1032, 1038Å doublet emission traces collisionally ionized gas with K, where the cooling curve peaks for metal-enriched plasma. This warm-hot phase i…

astro-ph.GA2016★ 28 cited

IC 3639 - A new bona fide Compton thick AGN unveiled by NuSTAR

Peter G. Boorman, P. Gandhi, D. Alexander +19

We analyse high-quality NuSTAR observations of the local (z = 0.011) Seyfert 2 active galactic nucleus (AGN) IC 3639, in conjunction with archival Suzaku and Chandra data. This pro…

astro-ph.GA2016★ 62 cited

Physics of Galactic Metals: Evolutionary Effects due to Production, Distribution, Feedback & Interaction with Black Holes

Ena Choi, Jeremiah P. Ostriker, Thorsten Naab +5

We ask how the inclusion of various physical heating processes due to the metal content of gas affect the evolution of massive galaxies and compute a suite of cosmological hydrodyn…

astro-ph.GA2016★ 116 cited

Quantifying Supernovae-Driven Multiphase Galactic Outflows

Miao Li, Greg L. Bryan, Jeremiah P. Ostriker

Galactic outflows are ubiquitously observed in star-forming disk galaxies and are critical for galaxy formation. Supernovae (SNe) play the key role in driving the outflows, but the…

astro-ph.GA2016★ 112 cited

Reverberation Mapping of Optical Emission Lines in Five Active Galaxies

M. M. Fausnaugh, C. J. Grier, M. C. Bentz +68

We present the first results from an optical reverberation mapping campaign executed in 2014, targeting the active galactic nuclei (AGN) MCG+08-11-011, NGC 2617, NGC 4051, 3C 382,…

astro-ph.GA2016★ 19 cited

New views of the distant stellar halo

Robyn E. Sanderson, Amy Secunda, Kathryn V. Johnston +1

Currently only a small number of Milky Way (MW) stars are known to exist beyond 100 kpc from the Galactic center. Though the distribution of these stars in the outer halo is believ…

astro-ph.GA2016★ 74 cited

The Properties of the Circumgalactic Medium in Red and Blue Galaxies: Results from the COS-GASS+COS-Halos Surveys

Sanchayeeta Borthakur, Timothy Heckman, Jason Tumlinson +7

We use the combined data from the COS-GASS and COS-Halos surveys to characterize the Circum-Galactic Medium (CGM) surrounding typical low-redshift galaxies in the mass range $\rm~M…

astro-ph.GA2016★ 45 cited

The Void Galaxy Survey: Photometry, structure and identity of void galaxies

B. Beygu, R. F. Peletier, J. M. van der Hulst +5

We analyze photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6m and 4.5m Spitzer photometry. The VGS…

astro-ph.GA2016★ 38 cited

Modeling the gravitational potential of a cosmological dark matter halo with stellar streams

Robyn E. Sanderson, Johanna Hartke, Amina Helmi

Stellar streams result from the tidal disruption of satellites and star clusters as they orbit a host galaxy, and can be very sensitive probes of the gravitational potential of the…

astro-ph.GA2016★ 201 cited

The role of mergers and halo spin in shaping galaxy morphology

Vicente Rodriguez-Gomez, Laura V. Sales, Shy Genel +10

Mergers and the spin of the dark matter halo are factors traditionally believed to determine the morphology of galaxies within a CDM cosmology. We study this hypothesis by consi…

astro-ph.GA2016★ 53 cited

Beyond Jcrit: a critical curve for suppression of H2-cooling in protogalaxies

J. Wolcott-Green, Z. Haiman, G. L. Bryan

Suppression of H2-cooling in early protogalaxies has important implications for the formation of supermassive black holes seeds, the first generation of stars, and the epoch of rei…

astro-ph.GA2016★ 30 cited

Exploding Satellites -- The Tidal Debris of the Ultra-Faint Dwarf Galaxy Hercules

Andreas H. W. Küpper, Kathryn V. Johnston, Steffen Mieske +2

The ultra-faint satellite galaxy Hercules has a strongly elongated and irregular morphology with detections of tidal features up to 1.3 deg (3 kpc) from its center. This suggests t…

astro-ph.GA2016★ 142 cited

Response of the Milky Way's disc to the Large Magellanic Cloud in a first infall scenario

Chervin F. P. Laporte, Facundo A. Gómez, Gurtina Besla +2

We present N-body and hydrodynamical simulations of the response of the Milky Way's baryonic disc to the presence of the Large Magellanic Cloud during a first infall scenario. For…

astro-ph.GA2016★ 80 cited

The Effect of the AGN Feedback on the Interstellar Medium of Early-Type Galaxies: 2D Hydrodynamical Simulations of the Low-Rotation Case

L. Ciotti, S. Pellegrini, A. Negri +1

We present 2D hydrodynamical simulations for the evolution of early-type galaxies containing central massive black holes (MBHs), starting at age 2 Gyr. The code contains accurate a…

astro-ph.GA2016★ 44 cited

On the origins of enigmatic stellar populations in Local Group galactic nuclei

Nathan W. C. Leigh, Fabio Antonini, Nicholas C. Stone +2

We consider the origins of enigmatic stellar populations in four Local Group galactic nuclei, specifically the Milky Way, M31, M32 and M33. These are centrally concentrated blue st…

astro-ph.GA2016★ 66 cited

The effect of a disc on the population of cuspy and cored dark matter substructures in Milky Way-like galaxies

Raphaël Errani, Jorge Peñarrubia, Chervin F. P. Laporte +1

We use high-resolution -body simulations to study the effect of a galactic disc on the dynamical evolution of dark matter substructures with orbits and structural parameters ext…

astro-ph.GA2016★ 39 cited

Empirically Constrained Predictions for Metal-Line Emission from the Circumgalactic Medium

Lauren Corlies, David Schiminovich

The circumgalactic medium (CGM) remains one of the least constrained components of galaxies and as such has significant potential for advancing galaxy formation theories. In this w…