Physics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..427t&link_type=abstract
In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A
Physics
1
Ism: Individual: Cassiopeia A, Supernova Remnants, Infrared: Ism, Submillimetre, Dust, Extinction
Scientific paper
We investigate the content of circumstellar and ejected dust within the prototype remnant of the core collapse supernova Cassiopeia A. We used maps of the spatial and spectral distribution of far-infrared continuum emission at 60, 100, 170 and 200 μm, obtained with the ISOPHOT instrument on board the Infrared Space Observatory. Our multi-wavelength coverage, combined with the fact that the colour temperature of the emission from cold dust in Cas A differs from that of the confusing foreground clouds, allows us to achieve the first detection of thermal FIR emission from the remnant longwards of 100 μm. We find no evidence for the presence of 2-4 Msolar of cold dust in the remnant as reported by Dunne et al. (2004) on the basis of SCUBA maps. In addition to the cold dust, we detect small quantities of hot, collisionally-heated grains towards both the shocked X-ray-emitting ejecta and circumstellar medium, as previously detected in measurements by IRAS.
Popescu Cristina C.
Tuffs Richard. J.
Völk Heinrich J.
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