Multiband gravitational wave observations of eccentric escaping binary black holes from globular clusters
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912764930293760 |
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| author | Zhao, Yuetong Askar, Abbas Lu, Youjun Cao, Zhoujian Giersz, Mirek Wiktorowicz, Grzegorz Hypki, Arkadiusz Hellstrom, Lucas Ali, Sohaib Ni, Wei-Tou |
| author_facet | Zhao, Yuetong Askar, Abbas Lu, Youjun Cao, Zhoujian Giersz, Mirek Wiktorowicz, Grzegorz Hypki, Arkadiusz Hellstrom, Lucas Ali, Sohaib Ni, Wei-Tou |
| contents | Stellar-mass binary black holes (sBBHs) formed in globular clusters (GCs) are promising sources for multiband gravitational wave (GW) observations, particularly with low- and middle-frequency detectors. These sBBHs can retain detectable eccentricities when they enter the sensitivity bands of low-frequency GW observatories. We study multiband GW observations of eccentric sBBHs that escape from GC models simulated with the MOCCA code, focusing on how low- and middle-frequency detectors can constrain their eccentricities and other parameters. Using Monte Carlo simulations, we generate ten realizations of cosmic sBBHs by combining the MOCCA sample with a cosmological model for GC formation and evolution. We then assess their detectability and the precision of parameter estimation. Our results show that LISA, Taiji, the LISA-Taiji network (LT), and AMIGO could detect $0.8\pm0.7$, $11.6\pm2.0$, $15.4\pm2.7$, and $7.9\pm1.3$ escaping sBBHs, respectively, over four years, while LT-AMIGO could detect $20.6\pm3.0$ multiband sBBHs in the same period. LT and AMIGO can measure initial eccentricities with relative errors of approximately $10^{-6}-2\times10^{-4}$ and $10^{-3}-0.7$, respectively. Joint LT-AMIGO observations have a similar ability to estimate eccentricities as LT alone. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_13151 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multiband gravitational wave observations of eccentric escaping binary black holes from globular clusters Zhao, Yuetong Askar, Abbas Lu, Youjun Cao, Zhoujian Giersz, Mirek Wiktorowicz, Grzegorz Hypki, Arkadiusz Hellstrom, Lucas Ali, Sohaib Ni, Wei-Tou High Energy Astrophysical Phenomena Stellar-mass binary black holes (sBBHs) formed in globular clusters (GCs) are promising sources for multiband gravitational wave (GW) observations, particularly with low- and middle-frequency detectors. These sBBHs can retain detectable eccentricities when they enter the sensitivity bands of low-frequency GW observatories. We study multiband GW observations of eccentric sBBHs that escape from GC models simulated with the MOCCA code, focusing on how low- and middle-frequency detectors can constrain their eccentricities and other parameters. Using Monte Carlo simulations, we generate ten realizations of cosmic sBBHs by combining the MOCCA sample with a cosmological model for GC formation and evolution. We then assess their detectability and the precision of parameter estimation. Our results show that LISA, Taiji, the LISA-Taiji network (LT), and AMIGO could detect $0.8\pm0.7$, $11.6\pm2.0$, $15.4\pm2.7$, and $7.9\pm1.3$ escaping sBBHs, respectively, over four years, while LT-AMIGO could detect $20.6\pm3.0$ multiband sBBHs in the same period. LT and AMIGO can measure initial eccentricities with relative errors of approximately $10^{-6}-2\times10^{-4}$ and $10^{-3}-0.7$, respectively. Joint LT-AMIGO observations have a similar ability to estimate eccentricities as LT alone. |
| title | Multiband gravitational wave observations of eccentric escaping binary black holes from globular clusters |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.13151 |