Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.4302m&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #43.02; Bulletin of the American Astronomical Society, Vol. 31, p.1431
Astronomy and Astrophysics
Astronomy
Scientific paper
We present long-slit Lα profiles from Supernova Remnant 1987A at 4 different locations obtained by the Space Telescope Imaging Spectrograph. Photons with Doppler shifts up to +/- 15,000 km/s are emitted by neutral Hydrogen atoms in the supernova envelope crossing a reverse shock. Since the envelope is in free expansion (v = r/t) the Doppler shift of a Lα photon reveals the emitting atom's position along the line of sight. Therefore a two dimensional Lα profile is equivalent to an image of a slice of the supernova envelope. We use the observations to construct a three dimensional model of the Lα emissivity of the envelope, and to determine the location and structure of the remnant's reverse shock. Support for this work is provided by NASA GSRP 153-1167, and through NASA grant GO-08243 from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.
Challis Peter
Garnavich Peter M.
Jason Pun Chun Shing
Kirshner Robert P.
McCray Richard
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