3D Spectroscopic View of Supernovae Using Light Echoes

Details 3D Spectroscopic View of Supernovae Using Light Echoes 3D Spectroscopic View of Supernovae Using Light Echoes

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733732r&link_type=abstract

American Astronomical Society, AAS Meeting #217, #337.32; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The study of light echoes from Galactic supernovae provides newly recognized observational benefits which we have only just begun to exploit. One benefit is the possibility of a three-dimensional spectroscopic view of a supernova. We have obtained several spectra of light echoes of the Cas A supernova. After properly accounting for the effects of nonzero dust filament extent and inclination, we find that even though the light-echo spectra are in general very similar, they show distinguishable differences in the line velocities on the order of 4000 km/s that are in agreement with the structure seen in X-ray images. This is direct evidence that the Cas A supernova was an asymmetric explosion.
We are grateful for the financial support of NSF grant AST-0908886 and AST-0907903

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