SDSS J081150.09+471615.2 , the SIMBAD biblio

2007ApJ...663L..77T - Astrophys. J., 663, L77-L80 (2007/July-2)

The discovery of 1000 km/s outflows in massive poststarburst galaxies at z=0.6.


Abstract (from CDS):

Numerical simulations suggest that active galactic nuclei (AGNs) play an important role in the formation of early-type galaxies by expelling gas and dust in powerful galactic winds and quenching star formation. However, the existence of AGN feedback capable of halting galaxy-wide star formation has yet to be observationally confirmed. To investigate this question, we have obtained spectra of 14 poststarburst galaxies at z∼0.6 to search for evidence of galactic winds. In 10/14 galaxies we detect Mg II λλ2796, 2803 absorption lines that are blueshifted by 490-2020 km/s with respect to the stars. The median blueshift is 1140 km/s. We hypothesize that the outflowing gas represents a fossil galactic wind launched near the peak of the galaxy's activity, a few 100 Myr ago. The velocities we measure are intermediate between those of luminous starbursts and broad absorption line quasars, which suggests that feedback from an AGN may have played a role in expelling cool gas and shutting down star formation.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: ISM - Galaxies: Starburst - Galaxies: Quasars: Absorption Lines

Simbad objects: 14

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