Probing Shock Properties with Non-thermal X-ray Filaments in Cas A

Details Probing Shock Properties with Non-thermal X-ray Filaments in Cas A Probing Shock Properties with Non-thermal X-ray Filaments in Cas A

2009-12-10

arxiv.org/abs/0912.2122v2

Astrophysical Journal 714 (2010) 396-403.

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

21 pages, 5 figures

Scientific paper

10.1088/0004-637X/714/1/396

Thin non-thermal X-ray filaments are often seen in young supernova remnants. We used data from the 1 Ms Chandra observation of Cassiopeia A to study spectral properties of some of the filaments in this remnant. For all the cases that we examined, the X-ray spectrum across the filaments hardens, at about 10% level, going outward, while observed filament widths depend only weakly on the photon energy. Using a model that includes radiative cooling, advection and diffusion of accelerated particles behind the shock, we estimated the magnetic field, turbulence level and shock obliquity.

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