Connections of MgII Absorption Kinematics and Galaxy Properties for a Sample of DLAs and Sub-DLAs

Details Connections of MgII Absorption Kinematics and Galaxy Properties for a Sample of DLAs and Sub-DLAs Connections of MgII Absorption Kinematics and Galaxy Properties for a Sample of DLAs and Sub-DLAs

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546009m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #460.09; Bulletin of the American Astronomical Society, Vol. 42, p.491

Astronomy and Astrophysics

Astronomy

Scientific paper

Quasar absorption line systems are of great use for studying the gas in galaxies and their surroundings over cosmic time, but it is difficult to establish a direct connection with the galaxies responsible for the absorption. We present a study of 20 lines of sight through galaxies for which the impact parameters and galaxy luminosities are known. These lines of sight are the subset of a survey of DLA and sub-DLA absorbing galaxies for which the MgII kinematics of the absorbers can be studied at high spectral resolution. We use archival VLT/UVES and Keck/HIRES echelle spectra to measure the kinematic spreads, velocity widths, FeII/MgII equivalent width ratios, and absorbed pixel fractions of the absorbers produced by the galaxies in our sample. These properties are then compared to the galaxy impact parameters and luminosities. The goal of the study is to determine which processes (e.g. superwinds, normal disk kinematics, and high velocity clouds) are responsible for the different kinematic signatures.

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