A spectrophotometric study of BQS quasars

Miller, Philip, Rawlings, Steve, Saunders, Richard and Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X 1992. A spectrophotometric study of BQS quasars. Monthly Notices of the Royal Astronomical Society 254 , pp. 93-110.

Full text not available from this repository.

Abstract

Flux-calibrated spectra of 39 low-redshift quasars from the Bright Quasar Survey (BQS) have been used to study a near-complete data set of optically selected quasars. Statistical partial rank analysis shows that the forbidden O III luminosity is more intimately connected to the H-beta luminosity, L(H-beta), than to observed continuum luminosity, L(cont). L(H-beta) is thus considered to be a better measure than L(cont) of the photoionizing luminosity. The effects of an orientation-dependent L(cont) on the rest-frame emission-line equivalent widths, EW(H-beta), and EW(forbidden O III), have been studied. It is found that scatter in the L(H-beta) - L(cont) relation is not due to a range in broad-line covering factor, and is inconsistent with one simple orientation scheme unless objects with very high disk inclination angles are excluded by the BQS selection criteria. It is demonstrated that there exists a correlation between the full width at half maximum of the H-beta line and L(H-beta), providing evidence for a gravitationally bound H-beta-emitting region and a scaling M(central) approximately proportional to L.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	Oxford University Press
ISSN:	0035-8711
Related URLs:	http://adsabs.harvard.edu/abs/1992MNRAS....
Last Modified:	24 Oct 2022 11:46
URI:	https://orca.cardiff.ac.uk/id/eprint/49271

Citation Data

Cited 50 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item