Physics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9209l&link_type=abstract
HST Proposal ID #9209
Physics
Hst Proposal Id #9209 Ism And Circumstellar Matter
Scientific paper
We propose to analyze archival HST imaging and spectral observations taken in the vicinity of SN 1987A in order to collect high spatial resolution data on the light echo. As of June 2000, there were over 600 potentiallly useful optical images taken within 8' of SN 1987A with the WFPC2, STIS, and WF/PC cameras. We will identify all sky areas within this region which have been imaged at multiple epochs through the same or similar filters. We will then apply the PSF-matched difference imaging technique developed by our group to study the three-dimensional spatial structure and physical properties of dust complexes in this region of the Large Magellanic Cloud. This technique has already proven very successful in detecting and monitoring faint new hot spots formed by the collision of the supernova ejecta with the inner circumstellar ring and also in discovering a previously unknown light echo structure located behind the supernova. We will also use the high-spatial resolution of single HST images to supplement our continuous ground-based monitoring of echo light curves in order to constrain the spatial sub-structure of the dust complexes.
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