RADIO SPECTRUM EVOLUTION OF THE SUPERNOVA REMNANT CASSIOPEIA A AT FREQUENCIES 35–65 MHZ
| Autor: | I. N. Bubnov, A. A. Konovalenko, A. A. Stanislavsky, V. P. Bovkoon, I. N. Zhouck, D. V. Mukha |
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| Jazyk: | English<br />Russian<br />Ukrainian |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Radio Physics and Radio Astronomy, Vol 19, Iss 2, Pp 111-119 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1027-9636 2415-7007 |
| DOI: | 10.15407/rpra19.02.111 |
| Popis: | The results of radio emission observations for Cassiopeia A source at frequencies 35, 38, 40, 45, 50, 55, 60 and 65 MHz are presented. At these frequencies, the radio-emission flux density ratio between Cassiopeia A and Cygnus A for the epoch of 2014 is obtained. Brief information about the antenna facility and reception equipment used in the measurements is given. At frequencies 35−65 MHz, the radio emission flux of Cassiopeia A is found for the epoch of 2014 by comparison with the well-known flux density of Cygnus A. The intersection frequency of the low-frequency spectra for Cassiopeia A and Cygnus A is experimentally determined. The results obtained by other authors for the secular decrease of the flux density of Cassiopeia A radio emission at 38 MHz are confirmed. |
| Databáze: | Directory of Open Access Journals |
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