Secular decreases in the 927 MHz emission from the supernova remnants CAS A and Tau A

Details Secular decreases in the 927 MHz emission from the supernova remnants CAS A and Tau A Secular decreases in the 927 MHz emission from the supernova remnants CAS A and Tau A

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aujph..32...93v&link_type=abstract

(Joint Australia-USSR-USA Symposium on Pulsars and Supernova Remnants, Sydney, Australia, Apr. 1978.) Australian Journal of Phys

Astronomy and Astrophysics

Astronomy

7

Microwave Emission, Radiant Flux Density, Radio Astronomy, Secular Variations, Supernova Remnants, Orion Nebula, Radio Galaxies, Stellar Radiation

Scientific paper

This paper presents 927-MHz flux densities for the SNRs Cassiopeia A and Taurus A relative to those for the radio galaxies Cygnus A and Virgo A and for the Orion Nebula. The measurements were made in October-December 1977 with the 10-m radio telescope at the Staraya Pustyn' (NIRFI) Radio Astronomical Observatory. Comparison between these data and the absolute flux-density measurements of Razin and Fedorov (1963) yields an annual decrease in flux density of 0.95% + or - 0.04% for Cas A and 0.18% + or - 0.01% for Tau A (14.2% + or - 0.6% and 2.7% + or - 0.1%, respectively, over the past 15 years).

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