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16 papers · 2 filters
Simulating the Carbon Footprint of Galactic Halos
Simeon Bird, Kate H. R. Rubin, Joshua Suresh +1
We compare simulations, including the Illustris simulations, to observations of CIV and CII absorption at z=2-4. These are the CIV column density distribution function in the colum…
On the OVI Abundance in the Circumgalactic Medium of Low-Redshift Galaxies
Joshua Suresh, Kate H. R. Rubin, Rahul Kannan +3
We analyze the mass, temperature, metal enrichment, and OVI abundance of the circumgalactic medium (CGM) around galaxies of mass $10^9 M_\odot <M_\bigstar < 10^{11.5} M…
The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars
Vicente Rodriguez-Gomez, Annalisa Pillepich, Laura V. Sales +9
We use the Illustris simulation to study the relative contributions of in situ star formation and stellar accretion to the build-up of galaxies over an unprecedentedly wide range o…
Excitation of coupled stellar motions in the Galactic Disk by orbiting satellites
E. D'Onghia, P. Madau, C. Vera-Ciro +2
We use a set of high-resolution N-body simulations of the Galactic disk to study its interactions with the population of satellites predicted cosmologically. One simulation illustr…
On the Assembly of Dwarf Galaxies in Clusters and their Efficient Formation of Globular Clusters
Pouria A. Mistani, Laura V. Sales, Annalisa Pillepich +6
Galaxy clusters contain a large population of low mass dwarf elliptical galaxies whose exact origin is unclear: their colors, structural properties and kinematics differ substantia…
Modeling Galactic Conformity with the Color-Halo Age Relation in the Illustris Simulation
Aaron D. Bray, Annalisa Pillepich, Laura V. Sales +9
Comparisons between observational surveys and galaxy formation models find that the mass of dark matter haloes can largely explain galaxies' stellar mass. However, it remains uncer…
Recoiling black holes: prospects for detection and implications of spin alignment
Laura Blecha, Debora Sijacki, Luke Zoltan Kelley +6
Supermassive black hole (BH) mergers produce powerful gravitational wave (GW) emission. Asymmetry in this emission imparts a recoil kick to the merged BH, which can eject the BH fr…
An analysis of the evolving comoving number density of galaxies in hydrodynamical simulations
Paul Torrey, Sarah Wellons, Francisco Machado +9
The cumulative comoving number-density of galaxies as a function of stellar mass or central velocity dispersion is commonly used to link galaxy populations across different epochs.…
Lens galaxies in the Illustris simulation: power-law models and the bias of the Hubble constant from time-delays
Dandan Xu, Dominique Sluse, Peter Schneider +4
A power-law density model, i.e., has been commonly employed in strong gravitational lensing studies, including the so-called time-delay technique used to inf…
The diverse evolutionary paths of simulated high-z massive, compact galaxies to z=0
Sarah Wellons, Paul Torrey, Chung-Pei Ma +6
Massive quiescent galaxies have much smaller physical sizes at high redshift than today. The strong evolution of galaxy size may be caused by progenitor bias, major and minor merge…
Galactic Angular Momentum in the Illustris Simulation: Feedback and the Hubble Sequence
Shy Genel, S. Michael Fall, Lars Hernquist +5
We study the stellar angular momentum of thousands of galaxies in the Illustris cosmological simulation, which captures gravitational and gas dynamics within galaxies, as well as f…
The merger rate of galaxies in the Illustris Simulation: a comparison with observations and semi-empirical models
Vicente Rodriguez-Gomez, Shy Genel, Mark Vogelsberger +9
We have constructed merger trees for galaxies in the Illustris Simulation by directly tracking the baryonic content of subhalos. These merger trees are used to calculate the galaxy…
Hot Gaseous Coronae around Spiral Galaxies: Probing the Illustris Simulation
Akos Bogdan, Mark Vogelsberger, Ralph P. Kraft +10
The presence of hot gaseous coronae around present-day massive spiral galaxies is a fundamental prediction of galaxy formation models. However, our observational knowledge remains…
Galaxy Morphology and Star Formation in the Illustris Simulation at z=0
Gregory F. Snyder, Paul Torrey, Jennifer M. Lotz +9
We study how optical galaxy morphology depends on mass and star formation rate (SFR) in the Illustris Simulation. To do so, we measure automated galaxy structures in 10808 simulate…
Mapping galaxy encounters in numerical simulations: The spatial extent of induced star formation
Jorge Moreno, Paul Torrey, Sara L. Ellison +4
We employ a suite of 75 simulations of galaxies in idealised major mergers (stellar mass ratio ~2.5:1), with a wide range of orbital parameters, to investigate the spatial extent o…
The Impact of Galactic Feedback on the Circumgalactic Medium
Joshua Suresh, Simeon Bird, Mark Vogelsberger +5
Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring…