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- W1679773085 abstract "We have analyzed archival Ginga data of a number of Soft X-ray Transient sources and modelled them in an attempt to constrain the geometry and physical properties of accretion. Our models include a self-consistent description of X-ray reprocessing, linking the properties of the reflected continuum and those of the iron fluorescence Kalpha line, and allowing for relativistic smearing of spectral features. We derive constraints on the inner extent of the disk and its ionization, assuming a generic geometry of a central X-ray source and an external accretion disk. Fitting our models to the data we have found that in some sources - GS 1124-68 (Nova Muscae 1991) and GS 2000+25 - the evolution during decline proceeded in qualitative agreement with recent theoretical models based on advection-dominated solutions of accretion flow. These models link the high/soft-low/hard transition with a change of geometry, most importantly, the inner radius of the optically thick disk. Quantitatively, our analysis requires serious revision of the model assumptions. A remarkably exceptional case is that of GS 2023+338, where the source behavior both during outburst and decline was quite different than the other, more ``standard'' ones. However, we found that the source did go into the high/soft state, contrary to claims in literature." @default.
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- W1679773085 date "1998-11-26" @default.
- W1679773085 modified "2023-09-25" @default.
- W1679773085 title "On accretion flow in Soft X-ray Transients" @default.
- W1679773085 hasPublicationYear "1998" @default.
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