NOAO >   Observing Info >   Approved Programs >   2013A-0540

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Proposal Information for 2013A-0540


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.


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NOAO >   Observing Info >   Approved Programs >   2013A-0540

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