High-Redshift Radio Galaxies from Deep Fields

Details High-Redshift Radio Galaxies from Deep Fields High-Redshift Radio Galaxies from Deep Fields

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011japa...32..609i&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 32, p. 609-612

Astronomy and Astrophysics

Astrophysics

Radio Source, High-Redshift, Galaxies

Scientific paper

Most of the radio galaxies with z > 3 have been found using the red-shift spectral index correlation. We have started a programme with the Giant Metrewave Radio Telescope (GMRT) to exploit this correlation at flux density levels about 100 times deeper than the known high-redshift radio galaxies, with an aim to detect candidate high-redshift radio galaxies. Here we present results from the deep 150 MHz observations of LBDS-Lynx field, which has been imaged at 327, 610 and 1412 MHz with the Westerbork Synthesis Radio Telescope (WSRT) and at 1400 and 4860 MHz with the Very Large Array (VLA). We find about 150 radio sources with spectra steeper than 1. About two-thirds of these are not detected in Sloan Digital Sky Survey (SDSS), hence are strong candidate high-redshift radio galaxies, which need to be further explored with deep infra-red imaging and spectroscopy to estimate the red-shift.

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