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  X-ray binaries in external galaxies

Gilfanov, M., Fabbiano, G., Lehmer, B., & Zezas, A. (2022). X-ray binaries in external galaxies. In A. Santangelo, & C. Bambi (Eds.), Handbook of X-ray and Gamma-ray Astrophysics. Singapore: Springer Singapore. doi:10.1007/978-981-16-4544-0_108-1.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-3BF5-D Version Permalink: https://hdl.handle.net/21.11116/0000-000D-3BF6-C
Genre: Book Chapter

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X-Ray Binaries in External Galaxies.pdf (Any fulltext), 2MB
 
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 Creators:
Gilfanov, Marat1, Author           
Fabbiano, Giuseppina, Author
Lehmer, Bret, Author
Zezas, Andreas, Author
Affiliations:
1High Energy Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159881              

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 Abstract: X-ray appearance of normal galaxies is mainly determined by X-ray binaries powered by accretion onto a neutron star or a stellar mass black hole. Their populations scale with the star-formation rate and stellar mass of the host galaxy, and their X-ray luminosity distributions show a significant split between star-forming and passive galaxies, both facts being consequences of the dichotomy between high- and low-mass X-ray binaries. Metallicity, IMF and stellar age dependencies, and dynamical formation channels add complexity to this picture. The numbers of high-mass X-ray binaries observed in star-forming galaxies indicate quite high probability for a massive star to become an accretion-powered X-ray source once upon its lifetime. This explains the unexpectedly high contribution of X-ray binaries to the cosmic X-ray background, of the order of ∼10%, mostly via X-ray emission of faint star-forming galaxies located at moderate redshifts which may account for the unresolved part of the CXB. Cosmological evolution of the LX −SFR relation can make high-mass X-ray binaries a potentially significant factor in (pre)heating of intergalactic medium in the early Universe.

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Language(s): eng - English
 Dates: 2022-12-012022
 Publication Status: Issued
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 Identifiers: DOI: 10.1007/978-981-16-4544-0_108-1
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Title: Handbook of X-ray and Gamma-ray Astrophysics
Source Genre: Book
 Creator(s):
Santangelo, Andrea , Editor
Bambi, Cosimo , Editor
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Publ. Info: Singapore : Springer Singapore
Pages: XX, 5000 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 978-981-19-6959-1
ISBN: 978-981-16-4544-0