Light Echoes From The Supernova-factory NGC 6946

Details Light Echoes From The Supernova-factory NGC 6946 Light Echoes From The Supernova-factory NGC 6946

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543110s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #431.10; Bulletin of the American Astronomical Society, Vol. 42, p.364

Astronomy and Astrophysics

Astronomy

Scientific paper

Observations of light echoes from a supernova provide exact three-dimensional positions of dust in its circumstellar environment, while constraining that dust's density, grain-sizes and chemical make-up. In short, following the evolution of echoes provides one of the only means to reconstruct the morphology of circumstellar dust shells, and reconstruct the mass-loss history of the supernova progenitor. As part of our SEEDS (Search for the Evolution of Emission from Dust in Supernovae) collaboration, we have been following the evolution of supernovae within NGC 6946, the most prolific supernova-producing galaxy in the nearby universe. All of these currently show evidence for resolved or unresolved scattered-light echoes, which we are using to piece together the full structure of the progenitor's circumstellar environments and mass-loss histories.

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