Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.9204c&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #92.04; Bulletin of the American Astronomical Society, Vol. 30, p.1386
Astronomy and Astrophysics
Astronomy
Scientific paper
Similar to luminous optical arcs, galaxy clusters are expected to gravitationally lens background sources at radio wavelengths. However, due to the smaller surface density of radio sources, compared to optical galaxies, such lensed events are rare. We present the expected number of strongly lensed radio sources due to foreground cluster potentials. At the flux density limit of the FIRST survey ( ~ 1 mJy), only a few sources are strongly lensed. At the mu Jy level, however, the surface density of radio sources increases. For a flat cosmology with Omega_m =0.3 and Omega_ Λ =0.7, we predict ~ 1500 lensed radio sources with flux densities greater than 10 mu Jy at 1.4 GHz, and with amplifications due to lensing greater than 2. We discuss the possibility of detecting lensed mu Jy radio sources towards clusters, and will present initial results from deep VLA observations of a sample of well known lensing clusters. Aided by amplification due to gravitational lensing, searches for lensed mu Jy radio sources towards clusters are likely to recover star-forming galaxies at redshifts of 1 to 3. Since radio emission is unaffected by dust, a systematic catalog of such sources can be used to evaluate the star formation history of the universe.
Carlstrom John E.
Cooray Asantha R.
No associations
LandOfFree
Gravitationally Lensed Radio Sources Towards Galaxy Clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gravitationally Lensed Radio Sources Towards Galaxy Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitationally Lensed Radio Sources Towards Galaxy Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-997122