Abstract
The Rossi X-ray Timing Explorer (RXTE) data of GRS 1915+105 from several observing periods were modelled with a thermal Comptonization model. In the model (Figure 1), seed soft photons from an optically thick cool disk are Comptonized in a hot spherical corona surrounding the inner disk. Although the coronal temperature and optical depth can not be determined simultaneously, a qualitative trend was observed: at high soft states the inner disk just touches the outer edge of the central corona, while during low hard states the corona is larger and denser and surrounds the inner disk.
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Vilhu, O., Nikula, P., Poutanen, J., Nevalainen, J. (2001). Thermal Comptonization in GRS 1915+105. In: Castro-Tirado, A.J., Greiner, J., Paredes, J.M. (eds) Microquasars. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0700-9_48
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DOI: https://doi.org/10.1007/978-94-010-0700-9_48
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