Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9114k&link_type=abstract
HST Proposal ID #9114
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #9114 Hot Stars
Scientific paper
Supernovae create the chemical history of the Universe, energize the interstellar gas, stiffen the spine of the extragalactic distance scale and provide the only evidence for an accelerating universe. SINS is a program to study supernovae with HST: perfectly matched in field and scale for spatially-resolved observations of SN 1987A. There, a violent encounter is underway between the fast-moving debris and the stationary inner ring, as predicted by our team members and first observed by us. Monitoring this interaction will help solve the riddles of stellar evolution posed by the enigmatic three-ring system of SN 1987A. Our UV observations of Ly- Alpha emission reveal the present location and velocity of a remarkable reverse shock that provides a unique laboratory for studying fast shocks and a powerful tool for dissecting the structure of the vanished star. For more distant events, we propose Target-of-Opportunity observations. In addition to one bright new supernova in Cycle 10 {discovered by any search,} we propose to discover two supernovae for study in the ultraviolet at times specificed in advance, using the world's most effective automated search system: the Lick Observatory Supernova Search. SINS will study the historic SN 1987A, explore UV emission from distant supernovae, and press late-time observations of supernovae into uncharted territory of infrared catastrophes, light echos, and stellar remnants.
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