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S.L. Cales, G. Canalizo (UC Riverside), M. Lacy (Caltech)
The relationship of Broad Absorption Line (BAL) QSOs to the general QSO population remains uncertain. We present a preliminary set of BALQSOs from a large sample of BALQSOs identified from the SDSS Data Release 2 (DR2) Catalog in order to further study the relationship. The use of the SDSS DR2 allows us to access a much larger population of BAL and non-BAL QSOs relative to previous studies. To inspect this relationship we use spectroscopic data from SDSS to compare BALQSO luminosity distributions with those of the non-BALQSO population. Within the BALQSO population, high (Hi) and low (Lo) ionization classifications are studied in relation with their luminosity distribution. Preliminary results show the LoBALQSOs appearing less luminous than the general population and more numerous that previously suggested. Their distribution also shows a secondary peak not observed in the other types of QSOs. From this data we look at three questions; first, are BALQSOs more or less luminous than the non-BALQSO population, second, are there changes in the luminosity of these types of QSOs as a function of redshift, and lastly, how do these results clarify the relationship between BALQSOs and non-BALQSOs. A discussion of possible selection effects is also included.
The author(s) of this abstract have provided an email address for comments about the abstract: scale001@student.ucr.edu
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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.