X-RAY AFTERGLOW of SWIFT J1644+57: A Compton ECHO?

K. S. Cheng, D. O. Chernyshov, V. A. Dogiel, Albert K.H. Kong, C. M. Ko

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

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.

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文章編號L10
期刊Astrophysical Journal Letters
816
發行號1
DOIs
出版狀態已出版 - 1 1月 2016

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