The nearest quasars

Details The nearest quasars The nearest quasars

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..148a&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Feb. 1984, p. 148-160.

Astronomy and Astrophysics

Astronomy

5

Astronomical Spectroscopy, Local Group (Astronomy), Quasars, Radio Astronomy, Brightness, Magnitude, Milky Way Galaxy, Radio Galaxies, Red Shift

Scientific paper

It is shown that there is a concentration of radio sources within about 10 degrees of the Local Group galaxy, M33. Many of these radio sources are quasars and radio galaxies with 0.2 ⪉ z ⪉ 0.5. The radio galaxies, having generally narrower emission lines than the quasars, are several magnitudes less luminous thereby suggesting a spectroscopic luminosity criterion. If associated with M33, however, all these objects have very low luminosities. The first quasar discovered, 3C 48 at z = 0.37, is a member of this group and has morphological characteristics of both a galaxy and a quasar. A plot of the brightest apparent magnitude quasars with 0.27 < z < 0.47 in this region of the sky shows they fall in a conspicuous line going through M33. Plots of the brightest apparent magnitude quasars with z ⪉ 0.5 in the opposite direction of the sky show they are generally associated with the nearby galaxies, M82, M101, and NGC 5128. The very brightest quasars in the sky, however, including 3C 273, fall in a direction opposite to the center of the Local Group galaxies. It is concluded they may be in the edge of the Local Group, near our Milky Way galaxy and be the nearest quasars to us.

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