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The Signatures of Large-scale Temperature and Intensity Fluctuations in the Lyman-alpha Forest
Matthew McQuinn, Lars Hernquist, Adam Lidz +1
It appears inevitable that reionization processes would have produced large-scale temperature fluctuations in the intergalactic medium. Using toy temperature models and detailed he…
Quasi-Resonant Theory of Tidal Interactions
Elena D'Onghia, Mark Vogelsberger, C. -A. Faucher-Giguere +1
When a spinning system experiences a transient gravitational encounter with an external perturber, a quasi-resonance occurs if the spin frequency of the victim matches the peak orb…
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 ~…
Constraints on Black Hole Growth, Quasar Lifetimes, and Eddington Ratio Distributions from the SDSS Broad Line Quasar Black Hole Mass Function
Brandon C. Kelly, Marianne Vestergaard, Xiaohui Fan +3
We present an estimate of the black hole mass function (BHMF) of broad line quasars (BLQSOs) that self-consistently corrects for incompleteness and the statistical uncertainty in t…
Cold Fronts by Merging of Shocks
Yuval Birnboim, Uri Keshet, Lars Hernquist
Cold fronts (CFs) are found in most galaxy clusters, as well as in some galaxies and groups of galaxies. We propose that some CFs are relics of merging between two shocks propagati…
A Non-Parametric Estimate of Mass 'Scoured' in Galaxy Cores
Philip F. Hopkins, Lars Hernquist
We present a simple estimate of the mass 'deficits' in cored spheroids, as a function of galaxy mass and radius within the galaxy. Previous attempts to measure such deficits depend…
Lensing reconstruction of cluster-mass cross-correlation with cosmic microwave background polarization
Jaiyul Yoo, Matias Zaldarriaga, Lars Hernquist
We extend our maximum likelihood method for reconstructing the cluster-mass cross-correlation from cosmic microwave background (CMB) temperature anisotropies and develop new estima…
Lyman-alpha Cooling Emission from Galaxy Formation
C. -A. Faucher-Giguere, D. Keres, M. Dijkstra +2
Recent studies have shown that galaxies accrete most of their baryons via the cold mode, from streams with temperatures T~10^4-10^5 K. At these temperatures, the streams should rad…
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…
Mergers in Lambda-CDM: Uncertainties in Theoretical Predictions and Interpretations of the Merger Rate
Philip F. Hopkins, Darren Croton, Kevin Bundy +10
Different methodologies lead to order-of-magnitude variations in predicted galaxy merger rates. We examine and quantify the dominant uncertainties. Different halo merger rates and…
Comparison Of Reionization Models: Radiative Transfer Simulations And Approximate, Semi-Numeric Models
Oliver Zahn, Andrei Mesinger, Matthew McQuinn +3
We compare the predictions of four different algorithms for the distribution of ionized gas during the Epoch of Reionization. These algorithms are all used to run a 100 Mpc/h simul…
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…