Computer Science
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..370c&link_type=abstract
NOAO Proposal ID #2001A-0370
Computer Science
Scientific paper
The collision between the ejecta of SN 1987A and its circumstellar ring is underway. Now and in the next few years, we are watching radical changes in the circumstellar nebula as it is overrun by ejecta expanding at a substantial fraction of c, giving birth to a supernova remnant. We have already discovered new interactions between the nebula and ejecta, in the form of ``hot spots'' via this program. The collision is predicted to produce intense IR and optical emission, in new and previously observed lines. Depending on whether they arise in the ejecta or nebula, and whether they are shock or EUV excited, these lines will have widths from ~ 10 to 15,000 km s^-1. Frequent echelle and moderate-dispersion spectra are proposed to monitor these features. Here we propose to obtain optical spectra with RCSP (directly comparable to our existing data), to compensate for a gap in our coverage will extend over at least four months (or at least ~ one year if we do not succeed here). This effort and an accompanying IR imaging proposal, treating transitions not covered by HST, will study for the first time ever the creation of a nearby supernova remnant.
Bouchet Patrice
Crotts Arlin
Heathcote Steve
Lawrence Steve
Sugerman Ben
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