The surface density of QSOs

Details The surface density of QSOs The surface density of QSOs

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....78..125s&link_type=abstract

Astronomy and Astrophysics, vol. 78, no. 2, Sept. 1979, p. 125-128. Research supported by the Swiss National Science Foundation

Astronomy and Astrophysics

Astrophysics

17

Quasars, Red Shift, Stellar Evolution, Stellar Structure, Density (Mass/Volume), Surface Properties, Tables (Data)

Scientific paper

A survey has been made of blue stars brighter than B equals 18.9 and bluer than U - B equals -0.35 in a 20.6 square degrees area. The survey is probably 90 percent complete. Seventy-one objects have been found, which should include 90 percent of the QSOs with a redshift smaller than z equals 2.30 in that region of the sky. The surface density of low redshift QSOs is found to be in the range 1.5 to 2.8 per square degree at B equals 18.9. To this number should be added 1.0 QSO of large redshift (z not less than 2.30) per square degree.

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