Zu-Cheng Chen

activity

20232026

most citedSimultaneously probing the sound speed and equation of state of the early Universe with pulsar timing arrays

46 citations · 127 across the 13 of their papers we have counts for

collaborators

Showing 2025Show all

3 papers · 1 filter

astro-ph.CO2025

GW231123 Mass Gap Event and the Primordial Black Hole Scenario

Chen Yuan, Zu-Cheng Chen, Lang Liu

We investigate the possibility that the recently reported GW231123 event, with component masses $M_{1} = 13 7_{- 17}^{+ 22} M_{⊙}$ , $M_{2} = 10 3_{- 52}^{+ 20} M_{⊙}$ and a local merger ra…

astro-ph.CO2025

Polynomial Potential Inflation in the ACT Era: From CMB to Primordial Black Holes

Zhi-Zhang Peng, Zu-Cheng Chen, Lang Liu

The recent measurements from the Atacama Cosmology Telescope (ACT) favor a higher value of the scalar spectral index $n_{s}$ compared to the Planck data, challenging many well-establ…

astro-ph.CO2025★ 4 cited

On the Gauge Invariance of Secondary Gravitational Waves

Chen Yuan, Yizhou Lu, Zu-Cheng Chen +1

Second-order tensor perturbations induced by primordial fluctuations play a crucial role in probing small-scale physics, but gauge dependence of their energy density has remained a…