Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.1705c&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #17.05; Bulletin of the American Astronomical Society, Vol. 31, p.1398
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present preliminary results of a systematic spectroscopic study of a sample of low-redshift objects that, while recognized as QSOs, share some characteristics with ultraluminous IR galaxies (e.g. overt signs of interaction and warm far IR colors). By modeling high S/N Keck LRIS spectra, we obtain ages for the most recent major starburst events in the host galaxies and interacting companions. We find that nearly all of these objects have dominant, relatively young (a few hundred Myr or younger) post-starburst populations. Using these ages as a rough estimate for the age of the QSO activity, we place these objects on an age sequence which provides the first steps in establishing whether these are transitional objects in an evolutionary sequence connecting ultraluminous IR galaxies and the classical QSO population.
Canalizo Gabriela
Stockton Alan
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