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Title:
A Million Second Chandra View of Cassiopeia A
Authors:
Hwang, Una; Laming, J. Martin; Badenes, Carles; Berendse, Fred; Blondin, John; Cioffi, Denis; DeLaney, Tracey; Dewey, Daniel; Fesen, Robert; Flanagan, Kathryn A.; Fryer, Christopher L.; Ghavamian, Parviz; Hughes, John P.; Morse, Jon A.; Plucinsky, Paul P.; Petre, Robert; Pohl, Martin; Rudnick, Lawrence; Sankrit, Ravi; Slane, Patrick O.; Smith, Randall K.; Vink, Jacco; Warren, Jessica S.
Affiliation:
AA(NASA GSFC, Code 662, Greenbelt, MD 20771; , , .; University of Maryland, College Park, MD 20742.), AB(Naval Research Laboratory, Code 7674L, Washington, DC 20375; .), AC(Institut d'Estudis Espacials de Catalunya, Edifici Nexus, Gran Capita 24, Desp. 2-4, E-08034 Barcelona, Spain; .), AD(Naval Research Laboratory, Code 7655.7, Washington, DC 20375; .), AE(North Carolina State University, Box 8202, Raleigh, NC 27695; .), AF(George Washington University, Washington, DC 20052; .), AG(University of Minnesota, 116 Church Street, Southeast, Minneapolis, MN 55455; , .), AH(Center for Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Building 37, Cambridge, MA 02139; , .), AI(Dartmouth College, 6127 Wilder Lab, Hanover, NH 03755; .), AJ(Center for Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Building 37, Cambridge, MA 02139; , .), AK(Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545; .), AL(Johns Hopkins University, 3400 Charles Street, Baltimore, MD 21218; , .), AM(Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854; , .), AN(Arizona State University, Box 871504, Tempe, AZ 85287; .), AO(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; , .), AP(NASA GSFC, Code 662, Greenbelt, MD 20771; , , .), AQ(Iowa State University, Ames, IA 50011; .), AR(University of Minnesota, 116 Church Street, Southeast, Minneapolis, MN 55455; , .), AS(Johns Hopkins University, 3400 Charles Street, Baltimore, MD 21218; , .), AT(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; , .), AU(NASA GSFC, Code 662, Greenbelt, MD 20771; , , .; Johns Hopkins University, 3400 Charles Street, Baltimore, MD 21218; , .), AV(SRON National Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands; .), AW(Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854; , .)
Publication:
The Astrophysical Journal, Volume 615, Issue 2, pp. L117-L120. (ApJL Homepage)
Publication Date:
11/2004
Origin:
UCP
ApJ Keywords:
ISM: Supernova Remnants, Stars: Supernovae: General, X-Rays: Individual: Constellation Name: Cassiopeia A, X-Rays: ISM
DOI:
10.1086/426186
Bibliographic Code:
2004ApJ...615L.117H

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.
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