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The Growth of Brightest Cluster Galaxies and Intracluster Light Over the Past Ten Billion Years
Tahlia DeMaio, Anthony H. Gonzalez, Ann Zabludoff +9
We constrain the evolution of the brightest cluster galaxy plus intracluster light (BCG+ICL) using an ensemble of 42 galaxy groups and clusters that span redshifts of z = 0.05-1.75…
H Emission and the Dependence of the Circumgalactic Cool Gas Fraction on Halo Mass
Huanian Zhang, Xiaohu Yang, Dennis Zaritsky +2
We continue our empirical study of the emission line flux originating in the cool ( K) gas that populates the halos of galaxies and their environments. Specifically, we…
A Lower Limit on the Mass of Our Galaxy from the H3 Survey
Dennis Zaritsky, Charlie Conroy, Huanian Zhang +5
The timing argument provides a lower limit on the mass of the Milky Way. We find, using a sample of 32 stars at kpc drawn from the H3 Spectroscopic Survey and mock catalog…
Resolving the Metallicity Distribution of the Stellar Halo with the H3 Survey
Charlie Conroy, Rohan P. Naidu, Dennis Zaritsky +4
The Galactic stellar halo is predicted to have formed at least partially from the tidal disruption of accreted dwarf galaxies. This assembly history should be detectable in the orb…
The intrinsic reddening of the Magellanic Clouds as traced by background galaxies -- I. The bar and outskirts of the Small Magellanic Cloud
Cameron P. M. Bell, Maria-Rosa L. Cioni, A. H. Wright +16
We present a method to map the total intrinsic reddening of a foreground extinguishing medium via the analysis of spectral energy distributions (SEDs) of background galaxies. In th…
Astro2020 APC White Paper: The MegaMapper: a z > 2 spectroscopic instrument for the study of Inflation and Dark Energy
David J. Schlegel, Juna A. Kollmeier, Greg Aldering +74
MegaMapper is a proposed ground-based experiment to measure Inflation parameters and Dark Energy from galaxy redshifts at 2<z<5. A 6.5-m Magellan telescope will be coupled with DES…