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astro-ph.HE2025
Hierarchical Black Hole Mergers in Nuclear Star Clusters: A Combined Dynamical-Secular Channel for GW231123-like Events
Bin Liu, Dieran Wang, Dong Lai
The recent binary black hole (BH) merger GW231123, with both components likely in the high-mass gap and with high spins, challenges standard BH binary formation models. It is usual…
astro-ph.EP2025
Spin and Obliquity Distributions of Low-mass Planets Shaped by Dynamical Instability
Dieran Wang, Jiaru Li, Dong Lai
Exoplanetary systems hosting multiple low-mass planets are thought to have experienced dynamical instability, during which planet-planet collisions and mergers occur; these collisi…
astro-ph.HE2025★ 2 cited
Hubble constant measurement from QPEs as electromagnetic counterparts to extreme mass ratio inspirals
Yejing Zhan, Di Wang, Shuang-Xi Yi +1
Gravitational waves (GWs) accompanied by electromagnetic (EM) counterparts provide a novel methodology to measure the Hubble constant (), known as bright sirens. However, the…