The Secular Decrease of Radio Emission Flux Densities of the Supernova Remnants Cassiopeia-A and Taurus-A at the Frequency 927-MHZ

Details The Secular Decrease of Radio Emission Flux Densities of the Supernova Remnants Cassiopeia-A and Taurus-A at the Frequency 927-MHZ The Secular Decrease of Radio Emission Flux Densities of the Supernova Remnants Cassiopeia-A and Taurus-A at the Frequency 927-MHZ

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..913v&link_type=abstract

Astronomicheskii Zhurnal, Vol. 56, P. 913, 1979

Physics

5

Scientific paper

Relative measurements of the radio flux of the supernova remnants Cas A and Tau A at 927 MHz frequency were carried out with the 10-m telescope of the Staraya Postyn' station, Gor'kii Radiophysics Institute, in October-December 1977. The Orion Nebula and the radio galaxies Cygnus A and Virgo A served as comparison sources. Comparison of the results with absolute made in Oktober 1962 indicates that over the 15-yr interval the radio flux of Cas A dropped by (14.2±0.6)% [mean annual decrease, (0.95 ±0.04)%], while the Tau A flux dropped by (2.7±0.1)% [mean annual decrease 0.18±0,1)%]A.

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