179 citations · 2k across the 114 of their papers we have counts for
114 papers
Primordial black holes and scalar induced density perturbations: the effects of probability density functions
Jing-Zhi Zhou, Yu-Ting Kuang, Zhe Chang +2
We investigate the second order energy density perturbation induced by small-scale Gaussian and local-type non-Gaussian primordial curvature perturbations. The relative a…
Pulsars as candidates of LHAASO sources J2226+6057, J1908+0621 and J1825-1326: The leptonic origin
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
Recently, from 12 -ray Galactic sources, the LHAASO has detected ultrahigh-energy photons up to 1.4PeV. The -ray spectra of the sources J2226+6057, J1908+0621, J1825-1326 and…
Primordial gravitational waves and curvature perturbations induced energy density perturbation
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
We study the second order scalar and density perturbations generated by the Gaussian curvature perturbations and primordial gravitational waves in the radiation-dominated era. Afte…
Primordial black holes and third order scalar induced gravitational waves
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
The process of \acp{PBH} formation would be inevitably accompanied by \acp{SIGW}. This strong correlation between \acp{PBH} and \acp{SIGW} signals could be a promising approach to…
Gravitational waves from primordial scalar and tensor perturbations
Zhe Chang, Xukun Zhang, Jing-Zhi Zhou
We investigate the second order gravitational waves induced by the primordial scalar and tensor perturbations during radiation-dominated era. The explicit expressions of the power…
Impact of the free-streaming neutrinos to the second order induced gravitational waves
Xukun Zhang, Jing-Zhi Zhou, Zhe Chang
The damping effect of the free-streaming neutrinos on the second order gravitational waves is investigated in detail. We solve the Boltzmann equation and give the anisotropic stres…