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Suzaku Observations of Tycho's Supernova Remnant

Tycho's supernova remnant was observed by the XIS and HXD instruments onboard the Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keV was well fitted with a two-component model, consisting of a power-law with photon index of 2.7 and a thermal bremsstrahlung model with temperature of 4.7 keV. The former component can alternatively be modeled as synchrotron emission from a population of relativistic electrons with an estimated roll-off energy of around 1 keV. In the XIS spectra, in addition to the prominent Fe K_alpha line (6.445 keV), we observe for the first time significant K_alpha line emission 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 also seen. The ionization states of Cr and Mn, based on their line centroids, are estimated to be similar to that of Fe K_alpha (Fe XV or XVI).

preprint2008arXivOpen access
T. TamagawaA. HayatoS. NakamuraY. TeradaA. BambaJ. S. HiragaJ. P. HughesU. HwangJ. KataokaK. KinugasaH. KuniedaT. TanakaH. TsunemiM. UenoS. S. HoltM. KokubunE. MiyataA. SzymkowiakT. TakahashiK. TamuraD. UenoK. Makishima
astro-ph
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T. TamagawaA. HayatoS. NakamuraY. TeradaA. BambaJ. S. HiragaJ. P. HughesU. HwangJ. KataokaK. KinugasaH. KuniedaT. TanakaH. TsunemiM. UenoS. S. HoltM. KokubunE. MiyataA. SzymkowiakT. TakahashiK. TamuraD. UenoK. Makishima

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