Host Galaxies of Obscured Quasars: Infant Starbursts Caught in Action

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May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..267..118l&link_type=abstract

Co-Evolution of Central Black Holes and Galaxies, Proceedings of the International Astronomical Union, IAU Symposium, Volume 267

Other

Galaxies: Active, Galaxies: Evolution, Galaxies: Interactions, Galaxies: Nuclei, Galaxies: Starburst, Galaxies: Stellar Content, Quasars: General

Scientific paper

Supermassive black holes (SMBHs) in the centers of massive galaxies are thought to predominantly grow in brief Eddington-rate quasar phases accompanied by starbursts, but on-going starbursts in luminous quasars are difficult to observe. Buried under the natural coronagraph, obscured quasars offer a unique window for direct, robust host-galaxy spectroscopy otherwise virtually inaccessible for luminous quasars. Our pilot study at z ~ 0.5 (Liu et al. 2009) revealed a substantial contribution from very young stellar populations with ages less than ~ 100 Myr in all of the observed host galaxy spectra. More dramatically, in three out of the nine SDSS quasars observed, we have witnessed strong infant starbursts with ages of ~ 5 Myr, clocked by the telltale Wolf-Rayet emission features.

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