Physics
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..241t&link_type=abstract
The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 241
Physics
10
Supernova Remnants, Dust
Scientific paper
Cooling metal-rich gas ejected in the explosion of massive core-collapse supernovae is considered to be one of the most promising potential sources of interstellar grains to supplement dust production by intact stars. Core-collapse supernovae might also be expected to give rise to IR emission from circumstellar dust created in red supergiant phases of the progenitor's evolution. Here we investigate the content of circumstellar and ejected dust within the prototype remnants of the core collapse supernovae Cas A and SN 1987A as revealed by new diffraction-limited observations of the spatial and spectral distribution of infrared continuum emission obtained using the ISOCAM and ISOPHOT-C instruments on ISO. Small quantities of hot, collisionally-heated grains of circumstellar origin are seen in both Cas A and around SN 1987A. In addition, maps of Cas A in the 100 - 200μ m range reveal the presence of a substantial mass ( 0.15Modot) of cold grains interior to the X-ray emitting shell, which we attribute to radiatively-heated condensates in unshocked ejecta.
Drury Luke O'C.
Fischera Joerg
Gabriel Carlos
Heinrichsen Ingolf
Rasmussen I.
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