119 citations · 623 across the 15 of their papers we have counts for
15 papers
Periodic Gravitational Lensing with Oscillating Boson Stars
Xing-Yu Yang, Tan Chen, Rong-Gen Cai
We show that oscillating (real-scalar) boson stars generically host an \emph{oscillating radial caustic}. Sources near this caustic cross it every half period, thereby producing pe…
Detecting the dark sector through scalar-induced gravitational waves
Xiao-Bin Sui, Jing Liu, Xing-Yu Yang +1
We investigate the evolution of cosmological scalar perturbations in the case that the background radiation is weakly coupled to a light scalar field . The light scalar is a…
Explaining Pulsar Timing Array Observations with Primordial Gravitational Waves in Parity-Violating Gravity
Chengjie Fu, Jing Liu, Xing-Yu Yang +2
The pulsar timing array (PTA) collaborations have recently suggested the presence of a gravitational wave background at nano-Hertz frequencies. In this paper, we explore potential…
Gravitational wave sources for Pulsar Timing Arrays
Ligong Bian, Shuailiang Ge, Jing Shu +3
Very recently, several pulsar timing array collaborations, including CPTA, EPTA, and NANOGrav, reported their results from searches for an isotropic stochastic gravitational wave b…
Gravitational wave probes on self-interacting dark matter surrounding an intermediate mass black hole
Kenji Kadota, Jeong Han Kim, Pyungwon Ko +1
The presence of dark matter overdensities surrounding a black hole can influence the evolution of a binary system. The gravitational wave signals emitted by a black hole binary off…
Gravitational microlensing by dressed primordial black holes
Rong-Gen Cai, Tan Chen, Shao-Jiang Wang +1
The accretion of dark matter around the primordial black holes (PBHs) could lead to the formation of surrounding minihalos, whose mass can be several orders of magnitude higher tha…
Pulsar Timing Residual induced by Wideband Ultralight Dark Matter with Spin 0, 1, 2
Sichun Sun, Xing-Yu Yang, Yun-Long Zhang
The coherent oscillation of ultralight dark matter in the mass regime around eV induces changes in gravitational potential with the frequency in the nanohertz range. Thi…
Testing primordial black hole and measuring the Hubble constant with multiband gravitational-wave observations
Lang Liu, Xing-Yu Yang, Zong-Kuan Guo +1
There exist two kinds of stochastic gravitational-wave backgrounds associated with the primordial curvature perturbations. One is called induced gravitational wave due to the nonli…
Energy spectrum of gravitational waves
Rong-Gen Cai, Xing-Yu Yang, Long Zhao
The energy spectrum of gravitational waves (GWs), which depicts the energy of GWs per unit volume of space per logarithmic frequency interval normalized to the critical density of…
On the energy of gravitational waves
Rong-Gen Cai, Xing-Yu Yang, Long Zhao
The energy of gravitational waves is a fundamental problem in gravity theory. The existing descriptions for the energy of gravitational waves, such as the well-known Isaacson energ…
The Gravitational-Wave Physics II: Progress
Ligong Bian, Rong-Gen Cai, Shuo Cao +15
It has been a half-decade since the first direct detection of gravitational waves, which signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave…
Constraints on a mixed model of dark matter particles and primordial black holes from the Galactic 511 keV line
Rong-Gen Cai, Yu-Chen Ding, Xing-Yu Yang +1
The galactic 511 keV gamma-ray line has been observed since 1970's, and was identified as the result of electron-positron annihilation, but the origin of such positrons is still no…
Primordial black holes and gravitational waves from parametric amplification of curvature perturbations
Rong-Gen Cai, Zong-Kuan Guo, Jing Liu +2
We investigate a new mechanism to create large curvature perturbations on small scales due to parameter resonance in a single-field inflationary model with a small periodic structu…
Pulsar Timing Array Constraints on the Induced Gravitational Waves
Rong-Gen Cai, Shi Pi, Shao-Jiang Wang +1
If the black holes detected by LIGO/VIRGO are primordial black holes (PBHs) sourcing from a large primordial curvature perturbation on small scales, the corresponding induced gravi…
Resonant multiple peaks in the induced gravitational waves
Rong-Gen Cai, Shi Pi, Shao-Jiang Wang +1
We identify analytically a multiple-peak structure in the energy-density spectrum of induced gravitational waves (GWs) generated at second-order from a primordial scalar perturbati…