4 papers
Comprehensive analysis of dissipative effects in the induced gravitational waves
Yan-Heng Yu, Zhe Chang, Sai Wang
Dissipation is an intrinsic property of the cosmic fluid, leading to the damping of curvature perturbations at small scales. In this paper, we comprehensively study dissipative eff…
Can tensor-scalar induced GWs dominate PTA observations ?
Di Wu, Jing-Zhi Zhou, Yu-Ting Kuang +3
Observational constraints on small-scale primordial gravitational waves are considerably weaker than those on large scales. We focus on scenarios with significant primordial gravit…
Constraints on primordial black holes from : scalar induced gravitational waves as an extra radiation component
Jing-Zhi Zhou, Yu-Ting Kuang, Zhe Chang +1
In June 2023, multiple pulsar timing array collaborations provided evidence for the existence of a stochastic gravitational wave background. Scalar induced gravitational waves (SIG…
Scalar induced gravitational waves in f(R) gravity
Jing-Zhi Zhou, Yu-Ting Kuang, Di Wu +3
We investigate the first and second order cosmological perturbation equations in f(R) modified gravity theory and provide the equation of motion of second order scalar induced grav…