%0 Journal Article
%T Variability in Quasar Broad Absorption Line Outflows
%A Daniel M. Capellupo
%A Fred Hamann
%A Joseph C. Shields
%A Jules Halpern
%A Paola Rodr¨ªguez Hidalgo
%A Tom A. Barlow
%J Physics
%D 2012
%I arXiv
%X Broad absorption lines (BALs) in quasar spectra identify high velocity outflows that likely exist in all quasars and could play a major role in feedback to galaxy evolution. Studying the variability in these BALs can help us understand the structure, evolution, and basic physical properties of these outflows. We are conducting a BAL monitoring program, which so far includes 163 spectra of 24 luminous quasars, covering time-scales from \sim 1 week to 8 years in the quasar rest-frame. We investigate changes in both the CIV {\lambda}1550 and SiIV {\lambda}1400 BALs, and we report here on some of the results from this program.
%U http://arxiv.org/abs/1204.6048v1