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Warm-hot gas in groups and galaxies toward H2356-309
Rik J. Williams, John S. Mulchaey, Juna A. Kollmeier
We present a detailed analysis of the galaxy and group distributions around three reported X-ray absorption line systems in the spectrum of the quasar H2356-309. Previous studies a…
The Absolute Magnitude of RRc Variables From Statistical Parallax
Juna A. Kollmeier, Dorota M. Szczygiel, Christopher R. Burns +12
We present the first definitive measurement of the absolute magnitude of RR Lyrae c-type variable stars (RRc) determined purely from statistical parallax. We use a sample of 247 RR…
Hydrogen and Metal Line Absorption Around Low-Redshift Galaxies in Cosmological Hydrodynamic Simulations
Amanda Brady Ford, Benjamin D. Oppenheimer, Romeel Davé +3
We study the physical conditions of the circum-galactic medium (CGM) around z=0.25 galaxies as traced by HI and metal line absorption, using cosmological hydrodynamic simulations t…