Probing the Spectral Breaks in 3C 58

Details Probing the Spectral Breaks in 3C 58 Probing the Spectral Breaks in 3C 58

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50279s&link_type=abstract

Spitzer Proposal ID #50279

Physics

Scientific paper

Spitzer observations of pulsar wind nebulae probe a unique spectral region which provides information on the spectrum injected by the pulsar, subsequent particle acceleration, and the evolution of the PWNe. In Spitzer AO-1 we carried out IRAC observations of 3C 58, a PWN powered by a powerful young pulsar. Our observations reveal the first detection of synchrotron emission from this nebula outside the radio and X-ray bands, and provide strong evidence for a spectral break between these bands. More importantly, we have discovered IR emission from the pulsar torus, and the associated broadband spectral behavior appears to indicate deviations from a single power law in the injection spectrum. If correct, this has considerable consequences for our interpretation of the pulsar injection spectrum and the age, evolution, and magnetic field structure. Here we propose MIPS observations of 3C 58 at 24 and 70 microns in order to obtain higher fidelity spectral information in this crucial break region.

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