Gravitational lenses in redshift surveys

Details Gravitational lenses in redshift surveys Gravitational lenses in redshift surveys

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...397..381k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 397, no. 2, p. 381-389.

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14

Cosmology, Gravitational Lenses, Quasars, Red Shift, Sky Surveys (Astronomy), Astronomical Models, Computational Astrophysics

Scientific paper

New gravitational lens systems should be discovered spectroscopically as a by-product of redshift surveys of nearby galaxies. The frequency of lenses is very sensitive to the lens model and rises rapidly in redshift surveys with fainter limiting magnitudes, with the expected number of lenses per 10,000 being 0.04 for a limit of m(B) = 17.5, and 0.1 for a limit of m(B) = 19 assuming that a quasar that is Delta m(B) = 2 magnitude fainter than the galaxy would be discovered. Each one magnitude increase in Delta m(B) roughly doubles the expected number of lenses, and the uncertainties due to the model for the lens galaxy are about a factor of four. It is predicted that the KOSS survey should find 0.2 unlensed quasars, 0.04-0.4 lensed quasar, depending on the lens model, and 0.5 galactic stars per 10,000 measured redshifts.

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