129 citations · 430 across the 23 of their papers we have counts for
23 papers
Gravitational wave cosmology
Ligong Bian, Rong-Gen Cai, Yu-Qi Dong +18
Gravitational waves (GWs) originating from cosmological sources offer direct insights into the physics of the primordial Universe, the fundamental nature of gravity, and the cosmic…
Generic effective sources for first-order in mass-ratio gravitational self-force calculations in Schwarzschild spacetime
Chao Zhang, Rong-gen Cai, Guoyang Fu +3
The numerical calculation of gravitational self-force in extreme mass ratio inspiral systems is fundamentally challenging due to the singular nature of point-particle sources. To o…
Unveiling the existence of nontensorial gravitational-wave polarizations from individual supermassive black hole binaries with pulsar timing arrays
Dicong Liang, Siyuan Chen, Chao Zhang +1
With the strong evidence for a gravitational wave (GW) background in the nanohertz frequency band from pulsar timing arrays, the detection of continuous GWs from individual superma…
Detecting new fundamental fields with Pulsar Timing Arrays
Chao Zhang, Ning Dai, Qing Gao +3
Strong evidence of the existence of the Stochastic Gravitational-Wave Background (SGWB) has been reported by the NANOGrav, PPTA, EPTA and CPTA collaborations. The Bayesian posterio…
Importance of including higher signal harmonics in the modeling of extreme mass-ratio inspirals
Chao Zhang, Ning Dai, Dicong Liang
Extreme mass-ratio inspirals (EMRIs) are the most potential sources detectable by the Laser Interferometer Space Antenna (LISA). To analyze the influence of higher harmonics on par…
Probing the equation of state of neutron stars with captured primordial black holes
Qing Gao, Ning Dai, Yungui Gong +3
Gravitational waves (GWs) from primordial black holes (PBHs) inspiraling within neutron stars (NSs) -- should they exist -- are detectable by ground-based detectors and offer a uni…
Detecting the secondary spin with extreme mass ratio inspirals in Scalar-Tensor theory
Hong Guo, Chao Zhang, Yunqi Liu +3
In this paper, we investigate the detectability of secondary spin in the extreme mass ratio inspirals system within a modified gravity model coupled with a scalar field. The centra…
Detecting vector charge with extreme mass ratio inspirals onto Kerr black holes
Chao Zhang, Hong Guo, Yungui Gong +1
Extreme mass ratio inspirals (EMRIs) are excellent sources for space-based observatories to explore the properties of black holes and test no-hair theorems. We consider EMRIs with…
Testing alternative theories of gravity with space-based gravitational wave detectors
Qing Gao, Yujie You, Yungui Gong +2
We use gravitational waves (GWs) from binary black holes (BBHs) and neutron stars inspiraling into intermediate-mass black holes to evaluate how accurately the future space-based G…
Gravitational waves from eccentric extreme mass-ratio inspirals as probes of scalar fields
Chao Zhang, Yungui Gong, Dicong Liang +1
We study eccentric orbits of the Schwarzschild spacetime for extreme mass ratio system (EMRI) in modified gravity theories with additional scalar fields. Due to the additional ener…
Detecting electric charge with Extreme Mass Ratio Inspirals
Chao Zhang, Yungui Gong
We consider extreme mass ratio inspirals during which an electrically charged compact object with mass and the charge to mass ratio inspirals around a Schwarzschild black…
Detection of scalar fields by Extreme Mass Ratio Inspirals with a Kerr black hole
Hong Guo, Yunqi Liu, Chao Zhang +3
We study extreme mass ratio inspirals occurring in modified gravity, for which the system is modeled by a small compact object with scalar charge spiraling into a supermassive Kerr…
Source localizations with the network of space-based gravitational wave detectors
Chunyu Zhang, Yungui Gong, Chao Zhang
The sky localization of the gravitational wave (GW) source is an important scientific objective for GW observations. A network of space-based GW detectors dramatically improves the…
Constraint on Brans-Dicke theory from intermediate/extreme mass ratio inspirals
Tong Jiang, Ning Dai, Yungui Gong +2
Intermediate/Extreme mass ratio inspiral (I/EMRI) system provides a good tool to test the nature of gravity in strong field. Based on the method of osculating orbits, we compute th…
Parameter estimation for space-based gravitational wave detectors with ringdown signals
Chunyu Zhang, Yungui Gong, Chao Zhang
Unlike ground-based gravitational wave detectors, space-based gravitational wave detectors can detect the ringdown signals from massive black hole mergers with large signal-to-nois…
Detection of gravitational wave mixed polarization with single space-based detectors
Chao Zhang, Yungui Gong, Dicong Liang +1
General Relativity predicts only two tensor polarization modes for gravitational waves while at most six possible polarization modes are allowed in general metric theory of gravity…
Accuracy of estimation of parameters with space-borne gravitational wave observatory
Chao Zhang, Yungui Gong, Bin Wang +1
Employing the Fisher information matrix analysis, we estimate parameter errors of TianQin and LISA for monochromatic gravitational waves. With the long-wavelength approximation we…
Sky localization of space-based gravitational wave detectors
Chao Zhang, Yungui Gong, Hang Liu +2
Localizing the sky position of the gravitational wave source is a key scientific goal for gravitational wave observations. Employing the Fisher information matrix approximation, we…
Full analytical formulas for frequency response of space-based gravitational wave detectors
Chunyu Zhang, Qing Gao, Yungui Gong +3
The discovery of gravitational waves, which are ripples of space-time itself, opened a new window to test general relativity, because it predicts that there are only plus and cross…
Exploring non-singular black holes in gravitational perturbations
Hang Liu, Chao Zhang, Yungui Gong +2
We calculate gravitational perturbation quasinormal modes (QNMs) of non-singular Bardeen black holes (BHs) and singularity-free BHs in conformal gravity and examine their spectra i…
Primordial black holes and secondary gravitational waves from k/G inflation
Jiong Lin, Qing Gao, Yungui Gong +3
The possibility that in the mass range around most of dark matter constitutes of primordial black holes (PBHs) is a very interesting topic. To produce PBHs with…
Frequency response of time-delay interferometry for space-based gravitational wave antennas
Chunyu Zhang, Qing Gao, Yungui Gong +3
Space-based gravitational wave detectors cannot keep rigid structures and precise arm length equality, so the precise equality of detector arms which is required in a ground-based…
Frequency response of space-based interferometric gravitational-wave detectors
Dicong Liang, Yungui Gong, Alan J. Weinstein +2
Gravitational waves are perturbations of the metric of space-time. Six polarizations are possible, although general relativity predicts that only two such polarizations, tensor plu…