Mathematics – Probability
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250...31a&link_type=abstract
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 31-42.
Mathematics
Probability
63
Density Distribution, Galactic Structure, Probability Theory, Quasars, Astronomical Spectroscopy, Elliptical Galaxies, Red Shift, Spiral Galaxies, Tables (Data), Ultraviolet Spectra
Scientific paper
Twenty-two new quasars close to galaxies are reported. All nonelliptical galaxies brighter than 12.8 with apparent companion galaxies are examined, and 13 of the 34 candidate companion galaxies are found to be quasars with an accidental probability of less than 0.01. In the RA region between NGC 5055 and NGC 7448, the confirmation is at the 10 to the -8th to 10 to the -16th level, and in the NGC 2441 to NGC 3184 region, the association is confirmed at the 10 to the -17th to the 10 to the -19th level. It is concluded that to avoid the association of these quasars with the low redshift companions, the average background density of distant quasars must be somewhere around 20 times what it is currently measured to be.
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