Close Binary Interactions of Intermediate‐Mass Black Holes: Possible Ultraluminous X‐Ray Sources? | Zendy

Laura Blecha | Zendy; Natalia Ivanova | Zendy; V. Kalogera | Zendy; Krzysztof Belczyński | Zendy; John M. Fregeau | Zendy; Frederic A. Rasio | Zendy

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Close Binary Interactions of Intermediate‐Mass Black Holes: Possible Ultraluminous X‐Ray Sources?

Author(s) -

Laura Blecha,

Natalia Ivanova,

V. Kalogera,

Krzysztof Belczyński,

John M. Fregeau,

Frederic A. Rasio

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/500727

Subject(s) - astrophysics , physics , black hole (networking) , intermediate mass black hole , luminosity , x ray binary , binary number , stellar black hole , binary black hole , astronomy , neutron star , galaxy , gravitational wave , computer network , routing protocol , routing (electronic design automation) , arithmetic , mathematics , computer science , link state routing protocol

While many observed ultra-luminous X-ray sources (ULXs, Lx > 10^39 erg s^-1)could be extragalactic X-ray binaries (XRBs) emitting close to the Eddingtonlimit, the highest-luminosity ULXs (Lx > 3x10^39 erg s^-1) exceed the isotropicEddington luminosity for even high-stellar-mass accreting black hole XRBs. Ithas been suggested that these highest-luminosity ULXs may contain accretingintermediate-mass black hole (IMBH) binaries. We consider this hypothesis fordense, young (about 100 Myr) stellar clusters where we assume that a 50-500solar mass central IMBH has formed through runaway growth of a massive star.Using numerical simulations of the dynamics and evolution of the central blackhole's captured companions, we obtain estimates of the incidence of masstransfer phases and possible ULX activity throughout the IMBH's evolutionaryhistory. We find that, although it is common for the central black hole toacquire binary companions, there is a very low probability that theseinteracting binaries will become observable ULX sources.Comment: 11 pages, 8 figures, submitted to Ap

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