Discovery of a narrow line quasar

Details Discovery of a narrow line quasar Discovery of a narrow line quasar

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252...69s&link_type=abstract

Astrophysical Journal, Part 1, vol. 252, Jan. 1, 1982, p. 69-74. Research supported by the Fundacao de Amparo a Pesquisa do Est

Astronomy and Astrophysics

Astrophysics

36

Forbidden Bands, Galactic Nuclei, Line Spectra, Quasars, Seyfert Galaxies, X Ray Sources, Active Galactic Nuclei, Emission Spectra, Luminosity, Red Shift, Spectral Resolution, Spectrum Analysis

Scientific paper

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.

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