Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21535903l&link_type=abstract
American Astronomical Society, AAS Meeting #215, #359.03; Bulletin of the American Astronomical Society, Vol. 42, p.546
Astronomy and Astrophysics
Astronomy
Scientific paper
Low-ionization Broad Absorption Line QSOs (LoBALs) are a rare class of objects, accounting only for 1-3% of the general population of QSOs. Their defining characteristic is the presence of high velocity (>2000 km/s) mass outflows of low- and high-ionization ions, which are evident in the very broad blue-shifted absorption troughs in their rest-UV spectra. There is some observational evidence that LoBALs at low redshifts might exclusively reside in Ultra Luminous Infrared Galaxies (ULIRGs) with disturbed morphologies and young stellar populations as a result of a recent galaxy merger. Those studies and the currently sparked interest in AGN feedback as a possible mechanism for regulating galaxy evolution have highlighted the importance of testing previous ideas proposing that BALs represent a short-lived outflow phase early in the life of QSOs. Herein we present the first results from a multiwavelength, systematic study of a complete sample of 22 LoBALs drawn from the SDSS DR3 within 0.5 < z < 0.6. We model their infrared SEDs and measure the total IR luminosities from 24, 70, and 160 micron Spitzer/MIPS observations. Also, we estimate the star formation rates from their IR luminosities and the PAH features in their Spitzer/IRS spectra.
Canalizo Gabriela
Lacy Mark
Lazarova Mariana S.
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