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- W2560614668 abstract "We use a model of the molecular gas distribution within ∼100 pc from the centre of the Milky Way (Kruijssen, Dale & Longmore) to simulate time evolution and polarization properties of the reflected X-ray emission, associated with the past outbursts from Sgr A*. While this model is too simple to describe the complexity of the true gas distribution, it illustrates the importance and power of long-term observations of the reflected emission. We show that the variable part of X-ray emission observed by Chandra and XMM–Newton from prominent molecular clouds is well described by a pure reflection model, providing strong support of the reflection scenario. While the identification of Sgr A* as a primary source for this reflected emission is already a very appealing hypothesis, a decisive test of this model can be provided by future X-ray polarimetric observations, which will allow placing constraints on the location of the primary source. In addition, X-ray polarimeters (like, e.g. XIPE) have sufficient sensitivity to constrain the line-of-sight positions of molecular complexes, removing major uncertainty in the model." @default.
- W2560614668 created "2016-12-16" @default.
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- W2560614668 date "2017-02-22" @default.
- W2560614668 modified "2023-10-18" @default.
- W2560614668 title "Polarization and long-term variability of Sgr A* X-ray echo" @default.
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- W2560614668 doi "https://doi.org/10.1093/mnras/stx443" @default.
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