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Abstract: An overview is given of multiwavelength observations of young supernovaremnants, with a focus on the observational signatures of efficient cosmic rayacceleration. Some of the effects that may be attributed to efficient cosmicray acceleration are the radial magnetic fields in young supernova remnants,magnetic field amplification as determined with X-ray imaging spectroscopy,evidence for large post-shock compression factors, and low plasma temperatures,as measured with high resolution optical-UV-X-ray spectroscopy. Specialemphasis is given to spectroscopy of post-shock plasma-s, which offers anopportunity to directly measure the post-shock temperature. In the presence ofefficient cosmic ray acceleration the post-shock temperatures are expected tobe lower than according to standard equations for a strong shock. For a numberof supernova remnants this seems indeed to be the case.



Autor: Jacco Vink Utrecht University

Fuente: https://arxiv.org/



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