2012/04/26 by Daniel M. Capellupo, Capellupo, Daniel M., Fred Hamann +9
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1204.6048
5 pages, proceedings for the conference "AGN Winds in Charleston", Charleston, S.C., 2011
arxiv created 2012/04/26 · openalex publication_date 2012/04/26 · arxiv updated 2012/04/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 ∼ 1 week to 8 years in the quasar rest-frame. We investigate changes in both the CIV λ1550 and SiIV λ1400 BALs, and we report here on some of the results from this program.