IOP Publishing Ltd.;United States: The American Astronomical Society
摘要:
摘要： ABSTRACT Swift, Chandra, and XMM have found a weak but nearly constant X-ray component from Swift J1644+57 that appeared at ∼500 days and was visible at least until ∼1400 days after the stellar capture, which cannot be explained by standard tidal disruption theories. We suggest that this X-ray afterglow component may result from the Thomson scattering between the primary X-rays and its surrounding plasma, i.e., a Compton echo effect. Similar phenomena have also been observed from molecular clouds in our Galactic Center, which were caused by the past activity of Srg A*. If this interpretation of Swift J1644+57 afterglow is correct, this is the first Compton Echo effect observed in the cosmological distances. 其他題名： APJL 其他題名： Astrophys. J. Lett 出版者： United States: The American Astronomical Society 出版日期： 2016-01-01 出處： Astrophysical journal. Letters, 2016-01, Vol.816 (1), p.L10--5 資源來源： Institute of Physics Journals 版權： 2016. The American Astronomical Society. All rights reserved. 識別號： ISSN: 2041-8205 識別號： EISSN: 2041-8213 識別號： DOI: 10.3847/2041-8205/816/1/L10
