The CGM around Dwarf Galaxies
Abstract
This poster will present the first results mapping the 2-D distribution of circumgalactic gas around nearby dwarf galaxies from the COS-Dwarfs survey. COS-Dwarfs uses HST/COS spectroscopy to probe the halos of low redshift galaxies with luminosities L = (0.02 - 0.3)L*, stellar masses (M*) = 10^(8-10) Msun, up to impact parameters of 150 kpc. Using sensitive UV absorption-line measurements of the multiphase gas diagnostics such as Lyα, CII/IV, Si II/III/IV We present the radial and azimuthal distribution of such gas around these galaxies. We also show how the absorption strengths vary with host galaxy color, mass, star formation rate, orientation, and how they compare with that of the L* galaxies probed by our related COS-Halos survey. In particular, I will present the dependence of CIV absorption on specific star formation rate (sSFR) and a total mass estimate for carbon around these dwarf galaxies.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22324303T