Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541025s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #410.25; Bulletin of the American Astronomical Society, Vol. 42, p.239
Astronomy and Astrophysics
Astronomy
Scientific paper
Models of poststarburst galaxies are constructed by combining fully three-dimensional numerical simulations of galaxy mergers with three-dimensional polychromatic radiative transfer. Mergers between gas-rich disks of nearly equal mass on a variety of orbits can lead to the unique optical spectrum of a poststarburst (or "K+A") galaxy. The lifetime and properties of this phase are strong functions of the merger scenario, and plausible physical origins of such dependencies are presented. We discuss whether galaxy mergers can account for the population of K+As found in surveys, and we test whether these models can produce K+A galaxies while highly obscured star formation continues. We compare to observations in various modes and wavelengths in an attempt to test and apply our models. In this picture, the K+A phase begins during or shortly after the bright AGN phase in violent mergers, and thus offers a unique opportunity to study the effects of quasar and star formation feedback on the gas reservoir and evolution of the remnant.
Cox Tom
Hayward Christopher
Hernquist Lars
Snyder Gregory F.
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