3 papers
astro-ph.CO2025
Accelerated Bayesian Inference for Pulsar Timing Arrays: Normalizing Flows for Rapid Model Comparison Across Stochastic Gravitational-Wave Background Sources
Junrong Lai, Changhong Li
The recent detection of nanohertz stochastic gravitational-wave backgrounds (SGWBs) by pulsar timing arrays (PTAs) promises unique insights into astrophysical and cosmological orig…
astro-ph.CO2025
Probing the Bounce Energy Scale in Bouncing Cosmologies with Pulsar Timing Arrays
Junrong Lai, Changhong Li
In this work we constrain the bounce energy scale in a generic framework of bouncing cosmologies using the nanohertz stochastic gravitational-wave backgrou…
astro-ph.CO2024
Dual Inflation and Bounce Cosmologies Interpretation of Pulsar Timing Array Data
Changhong Li, Junrong Lai, Jinjie Xiang +1
We explore a dual scenario of generalized inflation and bounce cosmologies, producing a scale-invariant curvature perturbation spectrum. Bayesian analysis with pulsar timing array…