A Million SecondChandraView of Cassiopeia A

Authors

Una Hwang, University of Maryland at College Park
J. Martin Laming, Naval Research Laboratory
Carles Badenes, Institute of Space Studies of CataloniaFollow
Fred Berendse, Naval Research Laboratory
John Blondin, North Carolina State University
Denis Cioffi, George Washington University
Tracey DeLaney, University of MinnesotaFollow
Daniel Dewey, Massachusetts Institute of Technology
Robert Fesen, Dartmouth CollegeFollow

Document Type

Article

Publication Date

11-10-2004

Publication Title

The Astrophysical Journal

Department

Department of Physics and Astronomy

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 (northeast jet and southwest 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.

DOI

10.1086/426186

Original Citation

Una Hwang et al 2004 ApJ 615 L117

Dartmouth Digital Commons Citation

Hwang, Una; Laming, J. Martin; Badenes, Carles; Berendse, Fred; Blondin, John; Cioffi, Denis; DeLaney, Tracey; Dewey, Daniel; and Fesen, Robert, "A Million SecondChandraView of Cassiopeia A" (2004). Dartmouth Scholarship. 2258.
https://digitalcommons.dartmouth.edu/facoa/2258