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Cold Fronts from Shock Collisions
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 collisions between trailing shocks.…
Mergers, AGN, and 'Normal' Galaxies: Contributions to the Distribution of Star Formation Rates and Infrared Luminosity Functions
Philip F. Hopkins, Joshua D. Younger, Christopher C. Hayward +2
We use a novel method to predict the contribution of normal star-forming galaxies, merger-induced bursts, and obscured AGN, to IR luminosity functions (LFs) and global SFR densitie…
Discriminating Between the Physical Processes that Drive Spheroid Size Evolution
Philip F. Hopkins, Kevin Bundy, Lars Hernquist +2
Massive galaxies at high-z have smaller effective radii than those today, but similar central densities. Their size growth therefore relates primarily to the evolving abundance of…
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>…
A Measurement of Small Scale Structure in the 2.2 < z < 4.2 Lyman-alpha Forest
Adam Lidz, C. -A. Faucher-Giguere, Aldo Dall'Aglio +5
The amplitude of fluctuations in the Ly-a forest on small spatial scales is sensitive to the temperature of the IGM and its spatial fluctuations. The temperature of the IGM and its…
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…