Evidence of a Curved Cosmic-Ray Electron Spectrum in the Supernova Remnant SN1006

Details Evidence of a Curved Cosmic-Ray Electron Spectrum in the Supernova Remnant SN1006 Evidence of a Curved Cosmic-Ray Electron Spectrum in the Supernova Remnant SN1006

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xrrc.proce4.07a&link_type=abstract

"X-Ray and Radio Connections (eds. L.O. Sjouwerman and K.K Dyer) Published electronically by NRAO, http://www.aoc.nrao.edu/event

Computer Science

X-Ray, Radio, Supernova Remnants

Scientific paper

A joint spectral analysis of some Chandra ACIS data, some radio data and the CANGAROO γ-ray data was performed for the eastern rim of the supernova remnant SN1006. These data were fitted with a model that includes synchrotron radiation and inverse-Compton scattering of the cosmic microwave background. The non-thermal electron spectrum used to compute the emission spectra for these two components is the traditional exponentially cut-off power law with one notable difference. The power-law index is not a constant. It is a logarithmic function of the momentum. This functional form enables us to show, for the first time, that the electron spectrum of SN1006 seems to flatten with increasing energy. At 1 GeV (i.e., radio--synchrotron-emitting energies), the power-law index is about 2.2. At 30 TeV (i.e., X-ray--synchrotron-emitting energies), the index is about 2.0. This result is quantitatively consistent with theoretical models of the amount of curvature in the proton spectrum of SN1006 and implies that cosmic rays are dynamically important, not ``test'' particles.

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