Light echoes and transient luminescence near SN 1987A

Details Light echoes and transient luminescence near SN 1987A Light echoes and transient luminescence near SN 1987A

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347l..61c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. L61-L64.

Astronomy and Astrophysics

Astrophysics

71

Luminescence, Optical Reflection, Stellar Envelopes, Stellar Winds, Supernova 1987A, Continuous Spectra, Forbidden Transitions, H Alpha Line, Oxygen Spectra

Scientific paper

The discovery of two new light echoes from sheets of material behind supernova 1987A and present images of the progenitor's circumstellar shell are reported, indicating diffuse echoes from the star's red giant wind. The echo sheets' geometry explains well the behavior of SN 1987's 10-micron flux, but the circumstellar shell appears to be 70 percent larger than the prediction from the analysis of narrow UV emission lines. The sheets' recombination time show them relatively thin and dense. The data also constrain the existence of any fourth star in the Sanduleak -69 deg 202 system and show that the feature reported 8 arcsecs from the supernova is probably not an echo from a thin sheet in SN 1987A's foreground.

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