The radio counterpart to the luminous X-ray supernova remnant in NGC 6946

Details The radio counterpart to the luminous X-ray supernova remnant in NGC 6946 The radio counterpart to the luminous X-ray supernova remnant in NGC 6946

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425l..77v&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 425, no. 2, p. L77-L79

Astronomy and Astrophysics

Astronomy

23

Radio Astronomy, Radio Sources (Astronomy), Spiral Galaxies, Supernova Remnants, Very Large Array (Vla), Cassiopeia A, Centimeter Waves, Decimeter Waves, Stellar Luminosity, Superhigh Frequencies, Ultrahigh Frequencies, X Ray Sources

Scientific paper

We report detection from Very Large Array (VLA) observations of the radio counterpart to the very luminous X-ray and optical supernova remnant in the galaxy NGC 6946. We find it to be a very luminous radio source, being approximately 3 times more powerful than Cas A and within an order of magnitude of the extraordinarily powerful supernova remnant in NGC 4449. We suggest that the NGC 6946 supernova remnant is analogous to the NGC 4449 supernova remnant, but is probably much older. The high luminosity at radio wavelengths for the NGC 6946 supernova remnant likely results from interaction with a dense local environment.

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