Decameter-wave observations of the supernova remnant CTA 1

Details Decameter-wave observations of the supernova remnant CTA 1 Decameter-wave observations of the supernova remnant CTA 1

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990azh....67..393k&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 67, Mar.-Apr. 1990, p. 393-399. In Russian.

Astronomy and Astrophysics

Astronomy

Brightness Temperature, Decametric Waves, Stellar Spectra, Supernova Remnants, Angular Resolution, Flux Density, Frequency Ranges, Frequency Shift

Scientific paper

The paper presents radio brightness distributions for CTA 1 at four frequencies in the range of 14.7 to 25 MHz with an angular resolution of about 30 arcmin. Below 25 MHz, the flux density decreases because of absorption by ionized hydrogen inside the remnant. The boundary of CTA 1 at decameter wavelengths is shifted eastward as compared with high-frequency data. This may be due to the effect of continuum emission with a steep spectrum arising at the outer side of the envelope.

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