Uv Imaging and Spectroscopy of S Andromedae in M31

Details Uv Imaging and Spectroscopy of S Andromedae in M31 Uv Imaging and Spectroscopy of S Andromedae in M31

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2955f&link_type=abstract

HST Proposal ID #2955

Computer Science

Hst Proposal Id #2955

Scientific paper

We recently discovered the long sought after remnant of the famous historical supernova, commonly known as S Andromedae, which occurred in 1885 in the bulge of M31. The remnant is detected optically as a dark spot of Fe I absorption at precisely the observed position of the SN event. Our detection shows that S And contains a large quantity of cold iron freely expanding at velocities up to 5000 km/s, consistent with its historical Type I classification. The remnant's inferred diameter is 0.3 - 0.5 arcsec. We propose to obtain UV FOC imaging and FOS spectroscopy of S And's remnant. From observed absorption line profiles it should be possible to determine directly density and composition as a function of radius in the freely expanding ejecta. This is a uniquely powerful observation made possible by HST's UV capability. It is important to establish first epoch observations of S And's evolving remnant at the earliest opportunity.

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