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- W4320719718 endingPage "83" @default.
- W4320719718 startingPage "83" @default.
- W4320719718 abstract "In the Galaxy, close binaries with compact objects are important low-frequency gravitational wave (GW) sources. As potential low-frequency GW sources, neutron star/white dwarf (WD) ultra-compact X-ray binaries (UCXBs) have been investigated extensively. Using the MESA code, we systematically explored the evolution of black hole (BH)-main sequence star (MS) binaries to diagnose whether their descendants can be detected by space-borne GW detectors. Our simulations show that BH-MS binaries with an initial orbital period less than the bifurcation period can evolve into BH UCXBs that can be detected by LISA. Such an evolutionary channel would form compact mass-transferring BH-WD systems rather than detached BH-WD systems. The calculated X-ray luminosities of BH UCXBs detected by LISA at a distance $d=1$ kpc are $sim10^{33}-10^{35}~rm erg,s^{-1}$ ($sim10^{34}-10^{35}~rm erg,s^{-1}$ for $d=10$ kpc), hence it is possible to detect their electromagnetic counterparts. It is worth emphasizing only some BH-MS systems with an initial orbital period very close to the bifurcation period can evolve toward low-frequency GW sources whose chirp masses can be measured. The maximum GW frequency of BH UCXBs forming by BH-MS pathway is about 3 mHz, which is smaller than the minimum GW frequency (6.4 mHz) of mass-transferring BH-WD originating from a dynamic process. Furthermore, we obtain an initial parameter space (donor-star masses and orbital periods) of progenitors of BH UCXB-GW sources, which can be applied to future population synthesis simulations. By a rough estimation, we predict that LISA could detect only a few BH UCXB-GW sources forming by the BH-MS channel." @default.
- W4320719718 created "2023-02-15" @default.
- W4320719718 creator A5016854610 @default.
- W4320719718 creator A5031430391 @default.
- W4320719718 creator A5089386194 @default.
- W4320719718 date "2023-02-01" @default.
- W4320719718 modified "2023-09-26" @default.
- W4320719718 title "Black Hole Ultracompact X-Ray Binaries: Galactic Low-frequency Gravitational Wave Sources" @default.
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