Cosmological Applications of Multiply Imaged Gravitational Lens Systems

Details Cosmological Applications of Multiply Imaged Gravitational Lens Systems Cosmological Applications of Multiply Imaged Gravitational Lens Systems

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jkas...36...97p&link_type=abstract

Journal of the Korean Astronomical Society, vol. 36, no. 3, pp. 97-103

Mathematics

Logic

Cosmology: Observations, Cosmology: Miscellaneous, Galaxies: General, Gravitational Lensing, Quasars: General

Scientific paper

We now have more than 70 multiple image gravitational lens systems. Since gravitational lensing occurs through gravitational distortions in cosmic space, cosmological informations can be extracted from multiple image systems. Specifically, Hubble constant can be determined by the time delay measurement, curvature of the universe can be measured by the distribution of image separations in lens systems, and limits on matter density and cosmological constant can be set by the statistics of gravitational lens systems. Uncertainties, however, still exist in various steps, and results may be taken with some caution. Larger systematic survey and better understanding of galaxy properties would definitely help.

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