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The Mass Dependance of Satellite Quenching in Milky Way-like Halos
John I. Phillips, Coral Wheeler, Michael C. Cooper +3
Using the Sloan Digital Sky Survey, we examine the quenching of satellite galaxies around isolated Milky Way-like hosts in the local Universe. We find that the efficiency of satell…
Comparing M31 and Milky Way Satellites: The Extended Star Formation Histories of Andromeda II and Andromeda XVI
Daniel R. Weisz, Evan D. Skillman, Sebastian L. Hidalgo +16
We present the first comparison between the lifetime star formation histories (SFHs) of M31 and Milky Way (MW) satellites. Using the Advanced Camera for Surveys aboard the Hubble S…
Near-Field Limits on the Role of Faint Galaxies in Cosmic Reionization
Michael Boylan-Kolchin, James S. Bullock, Shea Garrison-Kimmel
Reionizing the Universe with galaxies appears to require significant star formation in low-mass halos at early times, while local dwarf galaxy counts tell us that star formation ha…
Too Big to Fail in the Local Group
Shea Garrison-Kimmel, Michael Boylan-Kolchin, James S. Bullock +1
We compare the dynamical masses of dwarf galaxies in the Local Group (LG) to the predicted masses of halos in the ELVIS suite of CDM simulations, a sample of 48 Galaxy-size host…
A semi-analytic model comparison: testing cooling models against hydrodynamical simulations
Pierluigi Monaco, Andrew Benson, Gabriella De Lucia +3
We compare predictions of cooled masses and cooling rates from three stripped-down Semi-Analytic Models (SAMs) of galaxy formation with the results of N-body+SPH simulations with g…
M31 Satellite Masses Compared to LCDM Subhaloes
Erik J. Tollerud, Michael Boylan-Kolchin, James S. Bullock
We compare the kinematics of M31's satellite galaxies to the mass profiles of the subhaloes they are expected to inhabit in LCDM. We consider the most massive subhaloes of an appro…
The ACS LCID project. X. The Star Formation History of IC 1613: Revisiting the Over-Cooling Problem
Evan D. Skillman, Sebastian L. Hidalgo, Daniel R. Weisz +13
We present an analysis of the star formation history (SFH) of a field near the half light radius in the Local Group dwarf irregular galaxy IC 1613 based on deep Hubble Space Telesc…
The surprising inefficiency of dwarf satellite quenching
Coral Wheeler, John I. Phillips, Michael C. Cooper +2
We study dwarf satellite galaxy quenching using observations from the Geha et al. (2012) NSA/SDSS catalog together with LCDM cosmological simulations to facilitate selection and in…
The dynamics of isolated Local Group galaxies
Evan N. Kirby, James S. Bullock, Michael Boylan-Kolchin +2
We measured velocities of 862 individual red giant stars in seven isolated dwarf galaxies in the Local Group: NGC 6822, IC 1613, VV 124 (UGC 4879), the Pegasus dwarf irregular gala…