The Near-Infrared Synchrotron Spectral Index of Cassiopeia A

Details The Near-Infrared Synchrotron Spectral Index of Cassiopeia A The Near-Infrared Synchrotron Spectral Index of Cassiopeia A

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.7001e&link_type=abstract

American Astronomical Society Meeting 205, #70.01; Bulletin of the American Astronomical Society, Vol. 36, p.1462

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on our observations of diffuse near-infrared emission in the young supernova remnant Cassiopeia A with the PISCES infrared camera on the University of Arizona Bok 2.3 meter telescope. While previous K-band imaging (Gerardy and Fesen 2001) and polarimetry (Jones et al. 2003) confirms its synchrotron origin, our J and H detections allow us to measure the first near-infrared spectral index for this emission. We compare our results with radio, microwave, and X-ray observations, and discuss the implications for models of diffusive shock acceleration of cosmic rays.

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