Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs

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dc.creatorBoroson, Todd A.
dc.date2001-09-19
dc.date.accessioned2026-07-07T13:13:08Z
dc.date.available2026-07-07T13:13:08Z
dc.descriptionRecent studies of black holes in the nuclei of both active and normal galaxies have yielded relationships that permit a physical interpretation of the principal components of the spectra of QSOs. It is shown that principal component (or eigenvector) 1 (PC1) is driven predominantly by L/L{Edd}, and principal component 2 (PC2) is driven by luminosity or accretion rate. This results in a PC2 vs. PC1 diagram in which lines of constant black hole mass are diagonal. Using a sample consisting of the low-redshift PG objects supplemented by 46 radio-loud QSOs, it is shown that such a diagram effectively distinguishes radio-loud from radio-quiet as well as demonstrating that both narrow-line Seyfert 1s and broad absorption-line QSOs (BALQSOs) lie at the high L/LEdd} extreme, though these two types of objects are well separated in the PC2 direction. The very few radio-loud BALQSOs known fall in the region expected to be populated by such objects. Finally, a simple picture that ties together physical parameters and classification of AGN is presented.
dc.description21 pages including 7 figures, accepted for publication in Ap.J
dc.identifierhttps://arxiv.org/abs/astro-ph/0109317
dc.identifierhttp://arxiv.org/abs/astro-ph/0109317
dc.identifierAstrophys.J.565:78-85,2002
dc.identifierdoi:10.1086/324486
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229793
dc.subjectAstrophysics
dc.titleBlack Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
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