The spectrum of the low-frequency radio emission of Cassiopeia A

Details The spectrum of the low-frequency radio emission of Cassiopeia A The spectrum of the low-frequency radio emission of Cassiopeia A

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..987v&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Sept.-Oct. 1987, p. 987-991. In Russian.

Astronomy and Astrophysics

Astronomy

6

Emission Spectra, Hydrogen Ions, Low Frequencies, Radio Spectra, Spectral Energy Distribution, Supernova Remnants

Scientific paper

The flux densities of the radio emission from Cassiopeia A are measured at frequencies of 5.6 and 8.9 MHz, where S(5.6) and S(8.0) are 7000 + or - 5000 Jy and 32,000 + or - 7000 Jy, respectively. Possible reasons for the low-frequency dip in the spectrum are considered. It is concluded that the main factor is the absorption of radio emission in the relic zone of ionized hydrogen around the supernova remnant.

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