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- W1532397726 abstract "Supernova 1987 A has given us an unprecedented view of the evolution of the explosion debris and its interaction with circumstellar matter. The outer supernova debris, now expanding with velocities approx.8000 km/s, encountered the relatively dense circumstellar ring formed by presupernova mass loss in the early 1990s. The shock interaction is manifested by UV-optical hotspots, an expanding X-ray ring, an expanding ring of knotty non-thermal radio emission, and a ring of thermal IR emission from silicate dust Recent ultraviolet observations of the emissions from the reverse shock and the ring with the HST/COS reveal new details about the shock interaction. Lyman alpha emission from the reverse shock is much stronger than H alpha and they have different emission morphologies, pointing to different emission mechanisms. The reverse shock was detected for the first time in C IV 1550. The N V to C IV brightness ratio indicates the N/C abundance ratio in the expanding debris is about 100X solar, about 3X N/C in the inner ring." @default.
- W1532397726 created "2016-06-24" @default.
- W1532397726 creator A5050141712 @default.
- W1532397726 date "2012-09-10" @default.
- W1532397726 modified "2023-09-27" @default.
- W1532397726 title "SN 1987 A: A Unique Laboratory for Shock Physics" @default.
- W1532397726 hasPublicationYear "2012" @default.
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