The structure of SN 1987A's outer circumstellar envelope as probed by light echoes

Details The structure of SN 1987A's outer circumstellar envelope as probed by light echoes The structure of SN 1987A's outer circumstellar envelope as probed by light echoes

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..565..137c&link_type=abstract

YOUNG SUPERNOVA REMNANTS: Eleventh Astrophysics Conference. AIP Conference Proceedings, Volume 565, pp. 137-140 (2001).

Astronomy and Astrophysics

Astrophysics

2

Supernova Remnants, Supernovae, Circumstellar Shells, Clouds, And Expanding Envelopes, Circumstellar Masers

Scientific paper

We present ground-based and HST images processed by image subtraction to highlight transient reflection nebulae or ``light echoes'' of the maximum light pulse of the explosion of SN 1987A from surrounding material. Along with numerous structures already discussed elsewhere, we have found (in multiple epochs of data) a new feature opposite the SN from the mysterious ``Napoleon's Hat'' which indicates a symmetric structure due to shocks internal to the SN's red supergiant wind and probably caused by the pile-up of gas due to differential velocities within the outflow. We also show how echoes betray the ram pressure distribution of the progenitor mass loss flow. .

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