Spectrophotometry of Michigan-Tololo quasars

Details Spectrophotometry of Michigan-Tololo quasars Spectrophotometry of Michigan-Tololo quasars

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..787l&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, no. 3, Nov. 1, 1979, p. 787-795. NSF-supported research;

Astronomy and Astrophysics

Astronomy

52

Cosmology, Quasars, Spectrophotometry, Absorption Spectra, Emission Spectra, Radio Astronomy, Red Shift

Scientific paper

The Michigan-Tololo sample of quasars is discussed using observational data for 48% of this sample. Emission-line quasar characteristics are confirmed for 80% of the objects observed, including at least four new quasars with spectral features indicative of 'supernova-like' outflow. Approximately 73% of the redshifts predicted from the discovery plates are found to be accurate, with a mean error in z of 0.03; a large range of z (from about 0.1 to 3.16) is represented in the sample. The interpretation of the observed redshift distribution for quasars is strongly dependent upon the significance ascribed to wavelength-dependent selection effects. It appears that the behavior of the comoving quasar density above z = 2.0 may be represented by a constant or an exponential increase.

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