Radio emission from supernova remnants in M31 at a wavelength of 6 CM

Details Radio emission from supernova remnants in M31 at a wavelength of 6 CM Radio emission from supernova remnants in M31 at a wavelength of 6 CM

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.206..351d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 206, Jan. 15, 1984, p. 351-358.

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31

Andromeda Galaxy, Astronomical Spectroscopy, Radio Emission, Supernova Remnants, Brightness Distribution, Magellanic Clouds, Visible Spectrum

Scientific paper

Seventeen optically identified supernova remnants in M31 have been observed at a wavelength of 6.1 cm with the VLA. Three of the objects have good measurements, one appears present but may be confused, two were detected at about the noise level, and upper limits to the radio brightness were established for the others. Spectral indices determined from the present results plus previous measurements at 20 cm have an average value of -0.5, the same as that of SNR in the Galaxy. A comparison of the M31 SNR with the galactic Σ-D relation shows good agreement if M31 is assumed to be at a distance equal to 800 kpc. Observations at the position of the supernova S Andromedae 1885 give an upper limit for any radio emission of less than two-fifths the luminosity of Tycho's SNR.

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