The Kinematic Composition of Mg II Absorbers

摘要: The study of galaxy evolution using quasar absorption lines requires an understanding what components galaxies and their surroundings are contributing to the in various transitions. This paper considers kinematic composition class 0.4 < z 1.0 Mg II absorbers, particularly addressing question fraction this is produced halos arises from disks. We design models with fractional contributions radial infall halo material a rotating thick disk component. generate synthetic spectra sight through model compare resulting ensembles profiles ≤ sample observed Keck Telescope HIRES. apply battery statistical tests find that pure can be ruled out, but infall/halo produce ensemble nearly consistent data. A discrepancy all we considered existence component intermediate between disk. variety explained by gas disks being not very much different than local Universe. In any one case, there considerable ambiguity diagnosing absorber low-ionization high-resolution alone. Future data will allow morphologies, impact parameters orientations, Fe II/Mg clouds, distribution high-ionization incorporated into analysis. Combining these permit more accurate diagnosis physical conditions along line absorbing galaxy.