X-Ray Studies of HESS J1809-193 with Suzaku - Astrophysics > High Energy Astrophysical PhenomenaReport as inadecuate




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Abstract: Suzaku observed the region including HESS J1809-193, one of the TeVunidentified unID sources, and confirmed existence of the extended hard X-rayemission previously reported by ASCA, as well as hard X-ray emission from thepulsar PSR J1809-1917 in the region. One-dimensional profile of the diffuseemission is represented with a Gaussian model with the best-fit sigma of 7+-1arcmin. The diffuse emission extends for at least 21 pc at the 3sigma level,assuming the distance of 3.5 kpc, and has a hard spectrum with the photonindex of Gamma ~1.7. The hard spectrum suggests the pulsar wind nebula PWNorigin, which is also strengthened by the hard X-ray emission from PSRJ1809-1917 itself. Thanks to the low background of Suzaku XIS, we were able toinvestigate spatial variation of the energy spectrum, but no systematicspectral change in the extended emission is found. These results imply that theX-ray emitting pulsar wind electrons can travel up to 21 pc from the pulsarwithout noticeable energy loss via synchrotron emission.



Author: Takayasu Anada 1, Aya Bamba 2,1, Ken Ebisawa 1, Tadayasu Dotani 1 1 ISAS-JAXA, 2 DIAS

Source: https://arxiv.org/



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