Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012114n&link_type=abstract
American Astronomical Society Meeting 210, #121.14; Bulletin of the American Astronomical Society, Vol. 39, p.330
Astronomy and Astrophysics
Astronomy
Scientific paper
Light echoes from supernovae can illuminate interstellar dust and provide information on its structure, composition, and density. We have developed a new difference imaging technique (Newman & Rest 2006) for extracting light echo fluxes from a series of observations, without the need for an echo-free template. Using this method, along with 5 years of SuperMACHO imaging, we have obtained deep and detailed images of the light echoes around SN 1987A. Light echo positions are identified in these images using an automated flux-peak detection algorithm. Knowing the position on the sky and the epoch of observation, we obtain the three-dimensional position of the reflecting dust. Our dust maps show three extended structures with varying inclinations, along with a variety of filamentary strands extending 1.2 kpc in the supernova foreground. These maps will be valuable for studying the geometry and evolution of superbubbles in the Large Magellanic Cloud.
Becker Andrew C.
Challis Peter
Cook Kem H.
Damke Guillermo
Garg Anupam
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