Emission Line Properties of the Large Bright Quasar Survey

Simple item page
dc.creatorForster, Karl
dc.creatorGreen, Paul J.
dc.creatorAldcroft, Thomas L.
dc.creatorVestergaard, Marianne
dc.creatorFoltz, Craig B.
dc.creatorHewett, Paul C.
dc.date2000-11-20
dc.date.accessioned2026-07-07T10:31:03Z
dc.date.available2026-07-07T10:31:03Z
dc.descriptionWe present measurements of the optical/UV emission lines for a large homogeneous sample of 993 quasars from the Large Bright Quasar Survey. Our largely automated technique accounts for continuum breaks and galactic reddening, and we perform multicomponent fits to emission line profiles, including the effects of blended iron emission, and of absorption lines both galactic and intrinsic. Here we describe the fitting algorithm and present the results of line fits to the LBQS sample, including upper limits to line equivalent widths when warranted. The distribution of measured line parameters, principally equivalent width and FWHM, are detailed for a variety of lines, including upper limits. We thus initiate a large-scale investigation of correlations between the high energy continuum and emission lines in quasars, to be extended to complementary samples using similar techniques. High quality, reproducible measurements of emission lines for uniformly selected samples will advance our understanding of active galaxies, especially in a new era of large surveys selected by a variety of complementary methods.
dc.description25 pages, Latex, emulateapj style, including 8 tables and 4 figures. Accepted Nov 20, 2000 for publication in ApJS. See also http://hea-www.harvard.edu/~pgreen/Papers.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0011373
dc.identifierhttp://arxiv.org/abs/astro-ph/0011373
dc.identifierAstrophys.J.Suppl.134:35-52,2001
dc.identifierdoi:10.1086/320362
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178287
dc.subjectAstrophysics
dc.titleEmission Line Properties of the Large Bright Quasar Survey
dc.typetext

Files

Collections

arXiv