Upper limit to the 45-MHz flux density of SN 1987A

Details Upper limit to the 45-MHz flux density of SN 1987A Upper limit to the 45-MHz flux density of SN 1987A

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..575a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 2, p. 575-579.

Astronomy and Astrophysics

Astronomy

1

Electromagnetic Spectra, Flux Density, Light Curve, Magellanic Clouds, Radio Sources (Astronomy), Supernova 1987A, Astronomical Models, Radio Telescopes, Southern Sky

Scientific paper

Results are presented of an observational study of SN 1987A at 45 MHz using two techniques based on the assumption that the object will exhibit scintillation when its radiation gets through. On the basis of the theory developed for four well studied radio supernova and under the assumption that SN 1987A would behave like some of them, a detection at a level of several tens of Jy within the first two years of age was expected. The present results indicate that the flux density of SN 1987A was less than 5 Jy. From the nondetection it is inferred that SN 1987A did not behave like the radio supernova used for comparison, that the theory used is not applicable at very low frequencies, or that both statements may be valid. Under the assumption that the supernova is a compact source, it is estimated that a magnetic field of about 0.0001 would be sufficient to reduce the 45-MHZ radiation below 5 Jy.

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