31 citations · 111 across the 9 of their papers we have counts for
9 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…
Pulsars as candidates of LHAASO sources J2226+6057, J1908+0621 and J1825-1326
Zhe Chang, Xukun Zhang, Jing-Zhi Zhou
The LHAASO Collaboration has observed ultrahigh-energy photons up to PeV from -ray Galactic sources. In particular, the -ray spectra of the sources J2226+6057, J190…
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…
The cosmological vector modes from a monochromatic primordial power spectrum
Zhe Chang, Xukun Zhang, Jing-Zhi Zhou
The cosmological background of higher order vector modes can be generated by the first order scalar perturbations. We investigate the second order and the third order vector modes…
The Third Order Scalar Induced Gravitational Waves
Jing-Zhi Zhou, Xukun Zhang, Qing-Hua Zhu +1
Since the gravitational waves were detected by LIGO and Virgo, it has been promising that lots of information about the primordial Universe could be learned by further observations…