The extragalactic nature of CL4

Details The extragalactic nature of CL4 The extragalactic nature of CL4

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249l...1m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 249, Oct. 1, 1981, p. L1-L4. Research supported by the California Sp

Astronomy and Astrophysics

Astrophysics

8

Extragalactic Radio Sources, Quasars, Forbidden Bands, Red Shift

Scientific paper

The variable, unresolved radio source CL4 (2048 + 312) is identified as a quasar, in light of spectroscopy of its faint optical counterpart which shows a single, broad emission line at 6480 A. Although candidate redshifts of 1.31, 2.39, and 3.18 are proposed for identification of the emission feature as Mg II, semiforbidden C III, and C IV, respectively, the precise redshift cannot be determined without an extension of the current spectral coverage of this red object into the blue. CL4, together with the radio source 1910 + 052, which shows similar properties and for which an optical identification search was unsuccessfully conducted, is part of a group of eight compact, variable radio sources which may be related to SS 433. A compilation of evidence for this association shows that none of the eight objects are good candidates for an SS 433 analog.

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