A spectroscopically complete sample of quasars with BJ not greater than 22.0

Details A spectroscopically complete sample of quasars with BJ not greater than 22.0 A spectroscopically complete sample of quasars with BJ not greater than 22.0

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.256..349z&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 256, no. 2, May 15, 1992, p. 349-367.

Mathematics

Logic

67

Astronomical Spectroscopy, Emission Spectra, Line Spectra, Quasars, Stellar Spectra, Red Shift, Spectral Line Width, Spectrum Analysis, Stellar Magnitude

Scientific paper

The spectroscopic data for a complete sample of faint optically selected quasars extracted from the quasar candidates published by Marano et al. (1988) are presented and discussed. These data provided a sample of 54 confirmed quasars with J not more than 22.0. The sample is split into two redshift ranges (less than 2.2 and not less than 2.2); the corresponding surface densities at J of not more than 22.0 are 86.3 +/-14.5 and 28.7 +/-8.4. The log N-m relation for various subsamples of objects extracted from these data is discussed. It is found that, while these data confirm the relatively flat slope at faint magnitudes of the total counts of all the quasars, with no cut in absolute magnitude, the slope of the log N-m relation for low-luminosity objects (MB greater than -23.0) is steeper than the Euclidean value, thus suggesting a substantial cosmological evolution for them as well. The distributions of the equivalent widths of the main lines are, on average, consistent with other existing data at brighter magnitudes.

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