Mathematics – Logic
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2506c&link_type=abstract
ATNF proposal C1766, Semester: July, 2009
Mathematics
Logic
Extragalactic, Atca
Scientific paper
The study of the phenomenon of gravitational lensing is a mature science with evolving applications in astrophysical studies of high redshift objects as well as deriving cosmological parameters (through modeling of the mass distribution etc.). This project is a systematic search for gravitational lenses in the southern hemisphere sky through the use of data from the Australia Telescope 20 GHz (AT20G) survey. We have been following up on our list of candidates by observing them at higher resolution to obtain spectral index, component strength and morphological information. Our previous searches have provided us with ~10 interesting sources that need to be followed up at higher resolutions of VLBI. We have also obtained two promising sources which we intend to image using the ATCA in the CABB correlator mode to obtain high resolution and high sensitivity images. Due to the availability of the sensitivity of CABB, we intend to observe our weaker candidates, which is where a sizable majority of radio lenses have been found in similar northern hemisphere searches. On this proposal, we request for time to follow-up on 56 of our candidates at higher resolution and sensitivity as well as image two promising candidates.
Chhetri Rajan
Ekers Ron
Ricci Roberto
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