12 papers
Aligned Hierarchical Black Hole Mergers in Active-Galactic-Nuclei Disks Revealed by GWTC-4
Yin-Jie Li, Yuan-Zhu Wang, Shao-Peng Tang +1
The authors analyze GWTC‑4 binary black hole events with a flexible population model and identify a subpopulation of high‑spin, massive black holes whose spins are preferentially a…
Smoking-gun evidence for hierarchical black-hole mergers
Yin-Jie Li, Yuan-Zhu Wang, Shao-Peng Tang +1
How stellar-mass black holes grow after their birth is a central open question in astrophysics. Gravitational-wave observations have revealed a subpopulation of coalescing black ho…
Neutron Star Observations Challenge a Large Colour-Superconducting Gap in Dense Quark Matter
Shao-Peng Tang, Yong-Jia Huang, Yi-Zhong Fan
At asymptotically high density, quantum chromodynamics (QCD) predicts that quark matter becomes a colour superconductor in the colour-flavour-locked (CFL) phase, yet, away from the…
The Non-parametric Equation of State Realizes a Generalized Quark-Hadron Crossover
Yong-Jia Huang, Shao-Peng Tang, Yi-Zhong Fan
We propose a non-parametric approach to construct the statistical equation of state (EOS) continuously from the nuclear crust to the asymptotic-freedom regime. The combined require…
A new group of low-spin Black Holes and the high pair-instability mass cutoff
Yuan-Zhu Wang, Yin-Jie Li, Shi-Jie Gao +2
Pair-instability supernovae (PISN) will not leave compact remnants and hence yield a mass gap of the black holes. Though a transition point at , separating low-…
Secondary-Mass Features improve Spectral-Siren Constraints
Yin-Jie Li, Yi-Ying Wang, Yuan-Zhu Wang +2
Gravitational-wave (GW) signals from compact binary coalescences (CBCs) enable independent measurements of the Hubble constant \(H_0\) via the spectral siren method, which critical…