A Possible Test for the Cosmological Constant with Gravitational Lenses

Details A Possible Test for the Cosmological Constant with Gravitational Lenses A Possible Test for the Cosmological Constant with Gravitational Lenses

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.246p..24f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 246, NO. 3/OCT1, P. 24P, 1990

Mathematics

Logic

129

Scientific paper

We study the effect of the cosmological constant on the observation of gravitational lenses. It is shown that some of the lens observables are strongly affected by the cosmological constant, especially in a low-density universe, and its existence might be determined by a statistical study of lenses. In particular, the optical depth of the lens distribution may be used best for this purpose without referring much to the lens model. With a non-zero cosmological constant the optical depth increases rapidly as the source redshift increases, and the lens distribution has a peak at a substantially deeper redshift than if the cosmological constant were zero.

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