More spectroscopy of the fuzz around QSOs - additional evidence for two types of QSO

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163219· OSTI ID:6292937

Boroson, T A; Persson, S E; Oke, J B

Spectroscopic observations of the nebulosity around a sample of optically selected, UV excess QSOs are reported. The spectra of QSOs observed by Boroson, Oke, and Green (1982) are also presented. These sets of objects strengthen the case that there are fundamental properties that distinguish two groups of objects which are both called QSOs. These differences include the equivalent width of the nuclear forbidden O III 5007 A emission, the width and shape of the nuclear broad lines, the equivalent width of the nuclear Fe II emission, and the radio morphology or the spectral index. Measurements of these properties are presented and the correlations and statistical significances are discussed. These distinctions are discussed in terms of a model in which the accretion rate onto a black hole is varied. 25 references.

• Research Organization: Mount Wilson and Las Campanas Observatories, Pasadena, CA; Palomar Observatory, Pasadena, CA
• OSTI ID: 6292937
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 293; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
GALAXY NUCLEI
NONMETALS
OXYGEN
QUASARS
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
SPECTROSCOPY
VISIBLE SPECTRA