Physics
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50792c&link_type=abstract
Spitzer Proposal ID #50792
Physics
Scientific paper
The rare subclass of optically-selected QSOs known as low-ionization broad absorption line (LoBAL) QSOs show show signs of high-velocity gas outflows and reddened continua indicative of dust obscuration. Recent studies show that galaxies hosting LoBAL QSOs tend to be ultraluminous infrared systems that are undergoing mergers and that have young (< 100 Myr) stellar populations. Such observations support the idea that LoBAL QSOs represent a short-lived phase early in the life of QSOs, when powerful AGN-driven winds are blowing away the dust surrounding the QSO. If so, understanding LoBALs may be crucial in the study of phenomena regulating black hole and galaxy evolution, such as AGN feedback and the early stages of nuclear accretion. Such claims, however, are based on results from very small samples that may have serious selection biases. We are therefore taking a more aggressive approach by conducting a systematic study of a volume limited sample of LoBAL QSOs at 0.5 < z < 0.6 drawn from SDSS. We propose to obtain far-IR fluxes with MIPS to construct SEDs for these objects and determine whether they are truly exclusively found in ultraluminous infrared systems. We also propose to obtain IRS spectra to estimate star formation rates from PAH features.
Canalizo Gabriela
Lacy Mark
Lazarova Mariana
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