Populations of X-ray Binaries in the Galaxy

Computer Science

Scientific paper

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Scientific paper

We study populations of X-ray binaries in the Galaxy using data of orbital (INTEGRAL, RXTE, XMM-Newton) as well as ground-based (optical, radio) observatories. More than 340 sources are detected now in a hard X-ray energy band in the all sky. About two hundreds are located near the Galactic plane (|b |<5 deg), most of them have a galactic origin and belong to X-ray binaries, high (HMXB) and low mass (LMXB). The increased sensitivity of our survey allow us to significantly enlarge the sample of HMXBs, a large fraction of which are strongly absorbed. We investigated HMXB and LMXB distributions along the galactic plane and discussed them in a comparison with some model estimations of the density of different components of the Galaxy. The high quality broadband energy spectra for several dozens of new sources were also obtained and used, in line with optical and radio data, for the establishing of their nature.

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