Abstract
We study the spectral properties of ultraluminous X-ray (ULX) sources HOLMBERG IX X-1 and HOLMBERG II X-1 using the archival data of XMM-Newton (0.3–10.0 KeV) satellite. We use Two Component Advective Flow (TCAF) solution as an additive model in XSPEC for the spectral analysis. We extract parameters such as, Keplerian disk accretion rate (\(\dot {m}_d)\), sub-Keplerian accretion rate (\(\dot {m}_h)\), shock location (x s), compression ratio (R) and mass of the black hole (M bh). We fit the data from XMM-Newton satellite with TCAF model in the broadband energy coverage. From the spectral fit, we find that both sources contain an intermediate-mass black hole which accretes mass in sub-Eddington rate.
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Santra, P. (2018). Spectral Study of Ultraluminous X-ray Sources with XMM-Newton. In: Mukhopadhyay, B., Sasmal, S. (eds) Exploring the Universe: From Near Space to Extra-Galactic. Astrophysics and Space Science Proceedings, vol 53. Springer, Cham. https://doi.org/10.1007/978-3-319-94607-8_26
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DOI: https://doi.org/10.1007/978-3-319-94607-8_26
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