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Record Details

Record 18 of 75
Discovery of a narrow line quasar
External Online Source: doi:10.1086/159534
Author and Affiliation:
Stocke, J.(Arizona Univ., Tucson, AZ, United States)
Liebert, J.(Steward Observatory, Tucson, AZ, United States)
Maccacaro, T.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, CNR, Istituto di Radioastronomia)
Griffiths, R. E.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Steiner, J. E.(Arizona Univ., Tucson, AZ, United States)
Abstract: A stellar object is reported which, while having X-ray and optical luminosities typical of quasars, has narrow permitted and forbidden emission lines over the observed spectral range. The narrow-line spectrum is high-excitation, the Balmer lines seem to be recombinational, and a redder optical spectrum than that of most quasars is exhibited, despite detection as a weak radio source. The object does not conform to the relationships between H-beta parameters and X-ray flux previously claimed for a large sample of the active galactic nuclei. Because reddish quasars with narrow lines, such as the object identified, may not be found by the standard techniques for the discovery of quasars, the object may be a prototype of a new class of quasars analogous to high-luminosity Seyfert type 2 galaxies. It is suggested that these objects cannot comprise more than 10% of all quasars.
Publication Date: Jan 01, 1982
Document ID:
19820038008
(Acquired Nov 30, 1995)
Accession Number: 82A21543
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: Astrophysical Journal; vol. 252
Publisher Information: United States
Contract/Grant/Task Num: NAG8-370
Financial Sponsor: NASA; United States
Organization Source: Arizona Univ.; Tucson, AZ, United States
Harvard-Smithsonian Center for Astrophysics; Cambridge, MA, United States
Consiglio Nazionale delle Ricerche; Bologna, Italy
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FORBIDDEN BANDS; GALACTIC NUCLEI; LINE SPECTRA; QUASARS; SEYFERT GALAXIES; X RAY SOURCES; ACTIVE GALACTIC NUCLEI; EMISSION SPECTRA; LUMINOSITY; RED SHIFT; SPECTRAL RESOLUTION; SPECTRUM ANALYSIS
Imprint And Other Notes: Astrophysical Journal, Part 1, vol. 252, Jan. 1, 1982, p. 69-74. Research supported by the Fundacao de Amparo a Pesquisa do Estado de Sao Paulo;
Miscellaneous Notes: Jan. 1, 1982, p. 69-74. Research supported by the Fundacao de Amparo a Pesquisa do Estado de Sao Paulo
Availability Source: Other Sources
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