Abstract
Long-term measurements of the radio flux density of the young supernova remnant Cassiopeia A relative to the radio galaxy Cygnus A have been carried out at 290 and 927 MHz. We have obtained for the mean rates of the secular decrease of the radio emission of Cassiopeia A d 290 MHz = −0.67 ± 0.04% year−1 for 1978–2005 and d 927 MHz = −0.71 ± 0.035% year−1 for 1977–2004. The evolution of the radio spectrum of Cassiopeia A is traced based on long-term observations at 38, 151.5, 290, 927, and 2924 MHz.
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Original Russian Text © E.N. Vinyaĭkin, 2007, published in Astronomicheskiĭ Zhurnal, 2007, Vol. 84, No. 2, pp. 105–114.
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Vinyaĭkin, E.N. Evolution of the radio spectrum of Cassiopeia A from long-term observations. Observations at 290 and 927 MHz. Astron. Rep. 51, 87–96 (2007). https://doi.org/10.1134/S1063772907020023
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DOI: https://doi.org/10.1134/S1063772907020023