A Westerbork Synthesis Radio Telescope 1400 and 350 MHz Continuum Survey of the Cygnus OB2 Association, in Search of Hot Massive Stars

Citations Over TimeTop 11% of 2003 papers

Abstract

We present a radio continuum survey at 1400 and 350 MHz of a region of 2° × 2° centered on the Cygnus OB2 association (d = 1.7 kpc), using the Westerbork Synthesis Radio Telescope (WSRT) with angular resolutions of, respectively, 13'' and 55''. The resulting 5 σ flux-density limits of, respectively, ~2 mJy and ~10-15 mJy are a significant improvement over previous surveys. We detected 210 discrete sources with sizes less than 1.9θbeam (beam size), 98 of which at both frequencies. We also detected 28 resolved sources (sizes > 1.9θbeam) still having well-defined peak intensities. The observed spectral index α distribution and source count strongly suggest an excess of sources of Galactic origin in the direction of Cyg OB2.

Related Papers

• → The 100-meter radio telescope at Effelsberg(1973)53 cited
• → Effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope(2021)6 cited
• → A rooftop radio observatory: An undergraduate telescope system at the University of California at Berkeley(1998)2 cited
• A catalogue of sources found at 610 MHz with the Westerbork synthesis radio telescope - Source counts and spectral index distributions(1979)
• → A pilot intra-day variability study with the Kunming 40-m radio telescope(2014)