Searching for Gravitational Lenses using the AT20G Survey

Details Searching for Gravitational Lenses using the AT20G Survey Searching for Gravitational Lenses using the AT20G Survey

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atnf.prop.1592c&link_type=abstract

ATNF proposal C1766, Semester: April, 2008

Mathematics

Logic

Extragalactic, Atca

Scientific paper

Gravitational Lenses are good probes of mass distribution. We apply for time to observe candidates identified from the Australia Telescope 20 GHz (AT20G) survey. The distribution of known gravitational lenses in the low flux regions requires us to carefully observe our fainter candidates with maximum sensitivity as well as high resolution. We propose to identify gravitational lenses in the southern hemisphere using data from a complete survey of the southern hemisphere. Statistical studies of gravitational lenses from complete and large surveys like AT20G allow the constraining of cosmological parameters like mass density and dark energy by studying the evolution of mass distribution with red shift. The selection of high frequency of AT20G survey provides us a good opportunity to identify gravitational lenses due to high ratio of less complicated compact objects (eg. QSOs).

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