期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 470, 期 2, 页码 1687-1702出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1329
关键词
galaxies: active; galaxies: evolution; galaxies: general; galaxies: interactions
资金
- W. M. Keck Foundation
- Israel Science Foundation [284/13]
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- VanderbiltUniversity
- University of Virginia
- University of Washington
- Yale University
Post-starburst E+A galaxies are thought to have experienced a significant starburst that was quenched abruptly. Their disturbed, bulge-dominated morphologies suggest that they are merger remnants. We present Echelle Spectrograph and Imager/Keck observations of SDSS J132401.63+454620.6, a post-starburst galaxy at redshift z = 0.125, with a starburst that started 400 Myr ago, and other properties, like the star formation rate consistent with what is measured in ultraluminous infrared galaxies (ULRIGs). The galaxy shows both zero velocity narrow lines, and blueshifted broader Balmer and forbidden emission lines (FWHM = 1350 +/- 240 km s(-1)). The narrow component is consistent with LINER-like emission, and the broader component with Seyfert-like emission, both photoionized by an active galactic nucleus (AGN) whose properties we measure and model. The velocity dispersion of the broad component exceeds the escape velocity, and we estimate the mass outflow rate to be in the range 4-120 M-circle dot yr(-1). This is the first reported case of AGN-driven outflows, traced by ionized gas, in post-starburst E+A galaxies. We show, by ways of a simple model, that the observed AGN-driven winds can consistently evolve a ULIRG into the observed galaxy. Our findings reinforce the evolutionary scenario where the more massive ULIRGs are quenched by negative AGN feedback, evolve first to post-starburst galaxies, and later become typical red and dead ellipticals.
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