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Abstract: Tycho-s supernova remnant was observed by the XIS and HXD instruments onboardthe Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keVwas well fitted with a two-component model, consisting of a power-law withphoton index of 2.7 and a thermal bremsstrahlung model with temperature of 4.7keV. The former component can alternatively be modeled as synchrotron emissionfrom a population of relativistic electrons with an estimated roll-off energyof around 1 keV. In the XIS spectra, in addition to the prominent Fe K alphaline 6.445 keV, we observe for the first time significant K alpha lineemission from the trace species Cr and Mn at energies of 5.48 keV and 5.95 keV,respectively. Faint K beta lines from Ca 4.56 keV and Fe 7.11 keV are alsoseen. The ionization states of Cr and Mn, based on their line centroids, areestimated to be similar to that of Fe K alpha Fe XV or XVI.

Autor: T. Tamagawa, A. Hayato, S. Nakamura, Y. Terada, A. Bamba, J. S. Hiraga, J. P. Hughes, U. Hwang, J. Kataoka, K. Kinugasa, H. Kunie


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