The Halo from the Outside In: QSO Absorption Lines
Abstract
Studies of high resolution quasar absorption lines (QALs), arising from gas in local and z < 1.5 galaxies, provide direct probes of the kinematic, chemical, and ionization conditions and evolution of Milky Way-like galaxies. Inferences drawn from these studies provide a powerful analog for those based upon direct studies of the Halo. The observed gas kinematics and velocity evolution reveal that galactic halos are complex dynamical components, consistent with Searle--Zinn formation scenarios.
Cite
@article{arxiv.astro-ph/9601128,
title = {The Halo from the Outside In: QSO Absorption Lines},
author = {Christopher W. Churchill and Steven S. Vogt},
journal= {arXiv preprint arXiv:astro-ph/9601128},
year = {2007}
}
Comments
4 pages, Latex file, and 2 PostScript figures; To appear in Formation of the Galactic Halo... Inside and Out, eds. H. Morrison & A. Sarajedini (PASP Conference Series); Available as a single compressed PostScript file at http://www.ucolick.org/~cwc/qso/abstract.html