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The Spatial Extent and Distribution of Star Formation in 3D-HST Mergers at z~1.5
Kasper B. Schmidt, Hans-Walter Rix, Elisabete da Cunha +14
We present an analysis of the spatial distribution of star formation in a sample of 60 visually identified galaxy merger candidates at z>1. Our sample, drawn from the 3D-HST survey…
Submillimetre galaxies in a hierarchical universe: number counts, redshift distribution, and implications for the IMF
Christopher C. Hayward, Desika Narayanan, Dušan Kereš +4
High-redshift submillimetre galaxies (SMGs) are some of the most rapidly star-forming galaxies in the Universe. Historically, galaxy formation models have had difficulty explaining…
Modeling Mid-Infrared Diagnostics of Obscured Quasars and Starbursts
Gregory F. Snyder, Christopher C. Hayward, Anna Sajina +5
We analyze the link between active galactic nuclei (AGN) and mid-infrared flux using dust radiative transfer calculations of starbursts realized in hydrodynamical simulations. Focu…
Star Formation in Galaxy Mergers with Realistic Models of Stellar Feedback & the Interstellar Medium
Philip F. Hopkins, Thomas J. Cox, Lars Hernquist +3
We use simulations with realistic models for stellar feedback to study galaxy mergers. These high resolution (1 pc) simulations follow formation and destruction of individual GMCs…
The Mean Star Formation Rate of X-ray selected Active Galaxies and its Evolution from z=2.5: Results from PEP-Herschel
D. J. Rosario, P. Santini, D. Lutz +37
(Abridged) We study relationships between the SFR and the nuclear properties of X-ray selected AGNs out to z=2.5, using far-IR data in three extragalactic deep fields as part of th…
How to distinguish starbursts and quiescently star-forming galaxies: The `bimodal' submillimetre galaxy population as a case study
Christopher C. Hayward, Patrik Jonsson, Dušan Kereš +3
In recent work (arXiv:1101.0002) we have suggested that the high-redshift (z ~ 2-4) bright submillimetre galaxy (SMG) population is heterogeneous, with major mergers contributing b…
Recoiling Black Holes in Merging Galaxies: Relationship to AGN Lifetimes and Merger Remnant Properties
Laura Blecha, Thomas J. Cox, Abraham Loeb +1
Central supermassive black holes (SMBHs) are a ubiquitous feature of locally-observed galaxies, and ample evidence suggests that the growth of SMBHs and their host galaxies is clos…
The effects of a hot gaseous halo on disc thickening in galaxy minor mergers
Benjamin P. Moster, Andrea V. Maccio', Rachel S. Somerville +2
We employ hydrodynamical simulations to study the effects of dissipational gas physics on the vertical heating and thickening of disc galaxies during minor mergers. For the first t…
Quantified HI Morphology III: Merger Visibility Times from HI in Galaxy Simulations
B. W. Holwerda, N. Pirzkal, T. J. Cox +5
Major mergers of disk galaxies are thought to be a substantial driver in galaxy evolution. To trace the fraction and the rate galaxies are in mergers over cosmic times, several obs…
Recoiling Black Holes in Merging Galaxies
Laura Blecha, Thomas J. Cox, Abraham Loeb +1
Gravitational-wave (GW) recoil of merging supermassive black holes (SMBHs) may influence the co-evolution of SMBHs and their host galaxies. We examine this possibility using SPH/N-…
K+A Galaxies as the Aftermath of Gas-Rich Mergers: Simulating the Evolution of Galaxies as Seen by Spectroscopic Surveys
Gregory F. Snyder, Thomas J. Cox, Christopher C. Hayward +2
Models of poststarburst (or "K+A") galaxies are constructed by combining fully three-dimensional hydrodynamic simulations of galaxy mergers with radiative transfer calculations of…
What Does a Submillimeter Galaxy Selection Actually Select? The Dependence of Submillimeter Flux Density on Star Formation Rate and Dust Mass
Christopher C. Hayward, Dušan Kereš, Patrik Jonsson +3
We perform 3-D dust radiative transfer (RT) calculations on hydrodynamic simulations of isolated and merging disk galaxies in order to quantitatively study the dependence of observ…
Recoiling Black Holes in Merging Galaxies: Relationship to AGN Lifetimes, Starbursts, and the M-sigma Relation
Laura Blecha, Thomas J. Cox, Abraham Loeb +1
Gravitational-wave (GW) recoil of merging supermassive black holes (SMBHs) may influence the co-evolution of SMBHs and their host galaxies. We examine this possibility using SPH/N-…
Do sub-millimeter galaxy number counts provide evidence for a top-heavy IMF?
Christopher C. Hayward, Desika Narayanan, Patrik Jonsson +4
Theoretical models have had difficulty matching the observed number density of sub-millimeter galaxies (SMGs), causing some authors (e.g., Baugh et al. 2005) to suggest that SMGs p…
On Sizes, Kinematics, M/L Gradients, and Light Profiles of Massive Compact Galaxies at z~2
Stijn Wuyts, Thomas J. Cox, Christopher C. Hayward +5
We present a detailed analysis of the structure and resolved stellar populations of simulated merger remnants, and compare them to observations of compact quiescent galaxies at z ~…
Discovery of a large-scale galaxy filament near a candidate intergalactic X-ray absorption system
Rik J. Williams, John S. Mulchaey, Juna A. Kollmeier +1
We present an analysis of the large-scale galaxy distribution around two possible warm-hot intergalactic medium (WHIM) absorption systems reported along the Markarian 421 sightline…
The Kennicutt-Schmidt Star Formation Relation at z~2
Desika Narayanan, Thomas J. Cox, Christopher Hayward +1
Recent observations of excited CO emission lines from z~2 disc galaxies have shed light on the Kennicutt-Schmidt relation at high-z via observed SFR-CO (J=2-1) and (J=3-2) relation…
Orbital structure of merger remnants: Trends with gas fraction in 1:1 mergers
Loren Hoffman, Thomas J. Cox, Suvendra Dutta +1
Since the violent relaxation in hierarchical merging is incomplete, elliptical galaxies retain a wealth of information about their formation pathways in their present-day orbital s…
The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers
Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1
Gas-rich galaxy mergers are more easily identified by their disturbed morphologies than mergers with less gas. Because the typical gas fraction of galaxy mergers is expected to inc…
The Effect of Mass Ratio on the Morphology and Time-scales of Disc Galaxy Mergers
Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1
The majority of galaxy mergers are expected to be minor mergers. The observational signatures of minor mergers are not well understood, thus there exist few constraints on the mino…
A Physical Model for z~2 Dust Obscured Galaxies
Desika Narayanan, Arjun Dey, Christopher Hayward +8
We present a physical model for the origin of z~2 Dust-Obscured Galaxies (DOGs), a class of high-redshift ULIRGs selected at 24 micron which are particularly optically faint (24/R>…
Resonant stripping as the origin of dwarf spheroidal galaxies
Elena D'Onghia, Gurtina Besla, Thomas J. Cox +1
Dwarf spheroidal galaxies are the most dark matter dominated systems in the nearby Universe and their origin is one of the outstanding puzzles of how galaxies form. Dwarf spheroida…
Color Distributions, Number and Mass Densities of Massive Galaxies at 1.5 < z < 3: Comparing Observations with Merger Simulations
Stijn Wuyts, Marijn Franx, Thomas J. Cox +9
We present a comparison between the observed color distribution, number and mass density of massive galaxies at 1.5 < z < 3 and a model by Hopkins et al. that relates the quasar an…
The Star-Forming Molecular Gas in High Redshift Submillimeter Galaxies
Desika Narayanan, Thomas J. Cox, Christopher Hayward +2
We present a model for the CO molecular line emission from high redshift Submillimeter Galaxies (SMGs). By combining hydrodynamic simulations of gas rich galaxy mergers with the po…