Arcs around SN 1987 A

Details Arcs around SN 1987 A Arcs around SN 1987 A

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218..289k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 289-291.

Astronomy and Astrophysics

Astrophysics

1

Interstellar Extinction, Magellanic Clouds, Reflection Nebulae, Supernova Remnants, Supernova 1987A, Interstellar Magnetic Fields, Light Scattering, Magnetic Field Configurations, Polarization (Waves)

Scientific paper

The recently observed light echo of SN 1987 A is discussed. The circular arcs will be nearly centered on the light source, as observed, if they are large compared to the light travel distance since the supernova, as is the case. The observed surface brightness is used to calculate the interstellar extinction in the LMC, which is found to be comparable to that in the Galaxy. There is no evidence for a strong forward-scattering peak in the phase function. Predictions are made for the polarization of these light echoes. It may be possible to determine the spatial structure of the interstellar magnetic field and the mechanism of grain orientation.

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