A Million Second Chandra View of Cassiopeia A
Authors:
- Una HwangUHUna Hwang
- J. Martin LamingJLJ. Martin Laming
- Carles BadenesCBCarles Badenes
- Fred BerendseFBFred Berendse
- John BlondinJBJohn Blondin
- Denis CioffiDCDenis Cioffi
- Tracey DeLaneyTDTracey DeLaney
- Daniel DeweyDDDaniel Dewey
- Robert FesenRFRobert Fesen
- Kathryn A. FlanaganKFKathryn A. Flanagan
- Christopher L. FryerCFChristopher L. Fryer
- Parviz GhavamianPGParviz Ghavamian
- 8 October 2004
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 615 (2) , L117-L120
Abstract
We introduce a million-second observation of the supernova remnant Cassiopeia A with the Chandra X-ray Observatory. The bipolar structure of the Si-rich ejecta (NE jet and SW counterpart) is clearly evident in the new images, and their chemical similarity is confirmed by their spectra. These are most likely due to jets of ejecta as opposed to cavities in the circumstellar medium, since we can reject simple models for the latter. The properties of these jets and the Fe-rich ejecta will provide clues to the explosion of Cas A.Comment: 4 pages LaTeX with 2 figures; ApJL,in presKeywords
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