The double magnification bias by gravitational lensing

Details The double magnification bias by gravitational lensing The double magnification bias by gravitational lensing

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...251l..35b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 251, no. 2, Nov. 1991, p. L35-L38.

Astronomy and Astrophysics

Astrophysics

42

Dark Matter, Galactic Clusters, Gravitational Lenses, Quasars, Stellar Luminosity, Charge Coupled Devices, Imaging Techniques, Red Shift

Scientific paper

A hypothesis to the effect that the overdensity of foreground galaxies around quasars can be much higher if two or more spectral ranges are taken into account is presented. A quasar sample limited in radio luminosity is subject to two independent magnification biases (MBs), assuming that the two luminosities are not strongly correlated, which appears to be the case for quasars. Several deep imaging surveys of high redshift quasars undertaken for different purposes are discussed; indications of a double MB were found.

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