75 citations · 505 across the 34 of their papers we have counts for
Showing 2026 · astro-ph.COShow all
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astro-ph.CO2026
Probing Graviton Mass with MeerKAT PTA and SKA-PTA Forecasts
Zhi-Chao Zhao, Sai Wang
In this study, we derive constraints on the graviton mass using the 4.5-year data release from the MeerKAT Pulsar Timing Array (MPTA) and provide forecasts for the upcoming Square…
astro-ph.CO2026
Constraints on the Sum of Neutrino Masses from ACT DR6 and DESI DR2 Considering Isocurvature Initial Conditions
Hongsheng Hou, Sai Wang, Zhi-Chao Zhao +1
We present a robust assessment of cosmological constraints on the sum of neutrino masses () when relaxing the standard assumption of purely adiabatic primordial initial c…
astro-ph.CO2026★ 1 cited
Reassessing the SIGW Interpretation of PTA Signal: The Role of Third-Order Gravitational Waves and Implications for the PBH Overproduction
Zhi-Chao Zhao, Sai Wang, Qing-Hua Zhu +1
In light of recent interpretations attributing pulsar timing array (PTA) signal to second-order gravitational waves induced by linear cosmological curvature perturbations in the ea…