NOAO > Observing Info > Approved Programs > 2013A-0540
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NOAO > Observing Info > Approved Programs > 2013A-0540 |
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PI: David Sanmartim, Universidade Federal do Rio Grande do Sul (UFRGS), davidsanm@gmail.com
Address: Departamento de Astronomia - IF, Av. Bento Gonçalves, 9500, Campus do Vale, 91540-000 - Porto Alegre - RS, Brazil
CoI: Thaisa Storchi-Bergmann, Universidade Federal do Rio Grande do Sul (UFRGS)
CoI: Michael S. Brotherton, University of Wyoming
Title: The Nature of Post-Staburst Quasars
Abstract:
Post-Starburst Quasars (PSQs) are broad-lined AGN whose spectra show Balmer
jumps and high-order Balmer absorption lines from A stars characterstic of
massive post-starburst populations with ages of a few hundred Myr. These
objects are hypothesized to represent a stage in the evolution of massive
galaxies in which the star formation has been recently quenched due to the
feedback of the nuclear activity. Our goal is to test this scenario with a
resolved stellar populaton study in order to map the distribution of the
different stellar age components as well as to map the gas excitation and
kinematics in order to quantify the AGN feedback. With our previous GMOS-IFU
observations of two PSQs we have discovered that the young to intermediate
age components are not located right at nucleus, but are instead spread in a
circumnuclear ring beyond 1 kpc from the nucleus. It is essential to verify
if this is a general characteristic of PSQs in order to understand the nature
of these objects. We thus propose new GMOS-IFU observations of a larger
sample of PSQs. For the next semester we have selected two low redshift PSQs,
which are close and bright enough to allow a similar resolved study of its
stellar population and gas kinematics.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2013A-0540 |
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