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Variability in Quasar Broad Absorption Line Outflows

Published online by Cambridge University Press:  03 June 2010

Daniel M. Capellupo ,
Fred Hamann ,
Joseph C. Shields ,
Tom A. Barlow  and
Paola Rodriguez
Daniel M. Capellupo
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611-2055, USA Email: dancaps@astro.ufl.edu
Fred Hamann
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611-2055, USA Email: dancaps@astro.ufl.edu
Joseph C. Shields
Affiliation:
Department of Physics & Astronomy, Ohio University, Athens, OH 45701, USA
Tom A. Barlow
Affiliation:
California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA
Paola Rodriguez
Affiliation:
Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA
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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 (e.g., Di Matteo et al. 2005). Studying the variability in these BALs can help us understand the structure, evolution, and basic physical properties of these outflows. We are investigating BAL variability in a sample of 25 luminous quasars at 1.2 < z < 2.9 with multi-epoch observations that cover time scales from less than around a month to 7.7 years in the quasar rest-frame. We investigate changes in the C iv λ1549 BALs, and we see a variety of phenomena, including some BALs that either appeared or disappeared completely and other BALs that did not change at all over the whole observation period.

Keywords

galaxies: activequasars: generalquasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S267: Co-Evolution of Central Black Holes and Galaxies , August 2009 , pp. 394
Copyright
Copyright © International Astronomical Union 2010

References

Capellupo, D. M., et al. 2010, in preparationGoogle Scholar
Di Matteo, T., Springel, V., & Hernquist, L. 2005, Nature, 433, 604CrossRefGoogle Scholar