Evidence of ongoing AGN-driven feedback in a quiescent post-starburst E plus A galaxy

被引:31
作者
Baron, Dalya [1 ]
Netzer, Hagai [1 ]
Poznanski, Dovi [1 ]
Prochaska, Jason Xavier [2 ]
Schreiber, Natascha M. Foerster [3 ]
机构
[1] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[2] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, 1156 High St, Santa Cruz, CA 95064 USA
[3] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany
基金
以色列科学基金会; 美国安德鲁·梅隆基金会; 美国国家科学基金会;
关键词
galaxies: active; galaxies: evolution; galaxies: general; galaxies: interactions; DIGITAL SKY SURVEY; SUPERMASSIVE BLACK-HOLES; STAR-FORMATION HISTORIES; NARROW-LINE REGION; SPECTRAL ENERGY-DISTRIBUTION; GALACTIC NUCLEUS FEEDBACK; SCALE GASEOUS OUTFLOWS; II ESI SPECTRA; ACTIVE GALAXIES; MOLECULAR GAS;
D O I
10.1093/mnras/stx1329
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
收藏
页码:1687 / 1702
页数:16
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