Infrared echoes near the supernova remnant Cassiopeia A.

Krause, Oliver; Rieke, George H; Birkmann, Stephan M; Le Floc'h, Emeric; Gordon, Karl D; Egami, Eiichi; Bieging, John; Hughes, John P; Young, Erick T; Hinz, Joannah L; Quanz, Sascha P; Hines, Dean C

Krause, Oliver; Rieke, George H; Birkmann, Stephan M; Le Floc'h, Emeric; Gordon, Karl D; Egami, Eiichi; Bieging, John; Hughes, John P; Young, Erick T; Hinz, Joannah L; Quanz, Sascha P; Hines, Dean C.

Afiliación

Krause O; Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA. krause@as.arizona.edu

Science ; 308(5728): 1604-6, 2005 Jun 10.

Article en En | MEDLINE | ID: mdl-15947181

RESUMEN

Two images of Cassiopeia A obtained at 24 micrometers with the Spitzer Space Telescope over a 1-year time interval show moving structures outside the shell of the supernova remnant to a distance of more than 20 arc minutes. Individual features exhibit apparent motions of 10 to 20 arc seconds per year, independently confirmed by near-infrared observations. The observed tangential velocities are at roughly the speed of light. It is likely that the moving structures are infrared echoes, in which interstellar dust is heated by the explosion and by flares from the compact object near the center of the remnant.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2005 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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