2025/12/15 by Zhao, Yuetong, Abbas Askar, Askar, Abbas +15
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research #Stellar, planetary, and galactic studies
paper · pdf · doi:10.48550/arxiv.2512.13151
openalex publication_date 2025/12/15 · openalex created_date 2025/12/17 · openalex updated_date 2026/07/30
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±0.7, 11.6±2.0, 15.4±2.7, and 7.9±1.3 escaping sBBHs, respectively, over four years, while LT-AMIGO could detect 20.6±3.0 multiband sBBHs in the same period. LT and AMIGO can measure initial eccentricities with relative errors of approximately 10-6-2×10-4 and 10-3-0.7, respectively. Joint LT-AMIGO observations have a similar ability to estimate eccentricities as LT alone.