Journal article
DIRECT CONFIRMATION OF THE ASYMMETRY OF THE CAS A SUPERNOVA WITH LIGHT ECHOES
Abstract
We report the first detection of asymmetry in a supernova (SN) photosphere based on SN light echo (LE) spectra of Cas A from the different perspectives of dust concentrations on its LE ellipsoid. New LEs are reported based on difference images, and optical spectra of these LEs are analyzed and compared. After properly accounting for the effects of finite dust-filament extent and inclination, we find one field where the He i λ5876 and Hα …
Authors
Rest A; Foley RJ; Sinnott B; Welch DL; Badenes C; Filippenko AV; Bergmann M; Bhatti WA; Blondin S; Challis P
Journal
The Astrophysical Journal, Vol. 732, No. 1,
Publisher
American Astronomical Society
Publication Date
May 1, 2011
DOI
10.1088/0004-637x/732/1/3
ISSN
0004-637X