Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21348407l&link_type=abstract
American Astronomical Society, AAS Meeting #213, #484.07; Bulletin of the American Astronomical Society, Vol. 41, p.454
Astronomy and Astrophysics
Astronomy
Scientific paper
There is currently sparked interest in AGN feedback as a possible mechanism for regulating galaxy evolution. This emphasized the importance of testing previous ideas proposing that Broad Absorption Line QSOs (BALs) represent a short-lived outflow phase early in the life of QSOs. Results from recent studies of reddened quasars support those claims at least for Low-ionization BALs (LoBALs). A study of the only four LoBALs known at z < 0.4 shows evidence that all of them are young systems which have undergone a recent major merger. All of them are hosted by Ultraluminous Infrared Galaxies (ULIRGs) and high-resolution imaging shows disturbed morphologies and signs of tidal interactions. Spectra of the hosts show interaction-induced star formation with post-starburst ages < 100 Myr. We present preliminary results from Spitzer IRS and MIPS observations of a volume-limited sample of 22 Lo-BALs drawn from the SDSS DR3 within 0.5 < z < 0.6, all of which we found to be ULIRGs. We also highlight trends in their optical spectroscopic properties.
Canalizo Gabriela
Lazarova Mariana S.
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