2011

Outflowing Galactic Winds in Post-starburst and AGN Host Galaxies at 0.2<z<0.8

Coil, Alison L., Weiner, Benjamin J., Holz, Daniel E. et al.

Understand

We present Keck/LRIS-B spectra for a sample of ten AEGIS X-ray AGN host galaxies and thirteen post-starburst galaxies from SDSS and DEEP2 at 0.2<z<0.8 in order to investigate the presence, properties, and influence of outflowing galactic winds at intermediate redshifts.

We focus on galaxies that either host a low-luminosity AGN or have recently had their star formation quenched to test whether these galaxies have winds of sufficient velocity to potentially clear gas from the galaxy.
We find, using absorption features of Fe II, Mg II, and Mg I, that six of the ten (60%) X-ray AGN host galaxies and four of the thirteen (31%) post-starburst galaxies have outflowing galactic winds, with typical velocities of ~200 km/s.
We additionally find that most of the galaxies in our sample show line emission, possibly from the wind, in either Fe II* or Mg II.

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