216 citations · 2.3k across the 36 of their papers we have counts for
28 papers · 1 filter
Probing Ultralight Axion-like Dark Matter: A Pulsar Timing Arrays-Pulsar Polarization Arrays Synergy
Ximeng Li, Yonghao Liu, Zu-Cheng Chen +9
Ultralight axionlike dark matter (ALDM) is a leading candidate in the dark matter realm, characterized by its prominent wave properties on astronomical scales. Pulsar timing arrays…
Confronting primordial black holes with LIGO-Virgo-KAGRA and the Einstein Telescope
Zu-Cheng Chen, Alex Hall
The detection of gravitational waves (GWs) from binary black hole (BBH) coalescences by the LIGO-Virgo-KAGRA (LVK) Collaboration has raised fundamental questions about the genesis…
Constraints on the velocity of gravitational waves from NANOGrav 15-year data set
Yan-Chen Bi, Yu-Mei Wu, Zu-Cheng Chen +1
General relativity predicts that gravitational waves propagate at the speed of light. Although ground-based gravitational-wave detectors have successfully constrained the velocity…
Constraining the Graviton Mass with the NANOGrav 15-Year Data Set
Yu-Mei Wu, Zu-Cheng Chen, Yan-Chen Bi +1
The recently detected stochastic signal by several pulsar timing array collaborations, offers an opportunity to scrutinize the fundamental properties of gravity, including the pote…
Search for Non-Tensorial Gravitational-Wave Backgrounds in the NANOGrav 15-Year Data Set
Zu-Cheng Chen, Yu-Mei Wu, Yan-Chen Bi +1
The recent detection of a stochastic signal in the NANOGrav 15-year data set has aroused great interest in uncovering its origin. However, the evidence for the Hellings-Downs corre…
Exploring the NANOGrav Signal and Planet-mass Primordial Black Holes through Higgs Inflation
Zhu Yi, Zhi-Qiang You, You Wu +2
The data recently released by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) provides compelling evidence supporting the existence of a stochastic sign…
Cosmological Interpretation for the Stochastic Signal in Pulsar Timing Arrays
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang
The pulsar timing array (PTA) collaborations have recently reported compelling evidence for the presence of a stochastic signal consistent with a gravitational-wave background. In…
Probing the equation of state of the early Universe with pulsar timing arrays
Lang Liu, Zu-Cheng Chen, Qing-Guo Huang
The recently released data by pulsar timing array (PTA) collaborations have amassed substantial evidence corroborating the existence of a stochastic signal consistent with a gravit…
Confronting sound speed resonance with pulsar timing arrays
Jia-Heng Jin, Zu-Cheng Chen, Zhu Yi +3
The stochastic signal detected by pulsar timing arrays (PTAs) has raised great interest in understanding its physical origin. Assuming the signal is a cosmological gravitational-wa…
Implications for the non-Gaussianity of curvature perturbation from pulsar timing arrays
Lang Liu, Zu-Cheng Chen, Qing-Guo Huang
The recently released data by pulsar timing array (PTA) collaborations present strong evidence for a stochastic signal consistent with a gravitational-wave background. Assuming thi…
Implications for the Supermassive Black Hole Binaries from the NANOGrav 15-year Data Set
Yan-Chen Bi, Yu-Mei Wu, Zu-Cheng Chen +1
NANOGrav, EPTA, PPTA, and CPTA have announced the evidence for a stochastic signal from their latest data sets. Supermassive black hole binaries (SMBHBs) are supposed to be the mos…
Constraints on peculiar velocity distribution of binary black holes using gravitational waves with GWTC-3
Zhi-Qiang You, Zu-Cheng Chen, Lang Liu +4
Peculiar velocity encodes rich information about the formation, dynamics, evolution, and merging history of binary black holes. In this work, we employ a hierarchical Bayesian mode…
Towards a reliable reconstruction of the power spectrum of primordial curvature perturbation on small scales from GWTC-3
Li-Ming Zheng, Zhengxiang Li, Zu-Cheng Chen +2
Primordial black holes (PBHs) can be both candidates of dark matter and progenitors of binary black holes (BBHs) detected by the LIGO-Virgo-KAGRA collaboration. Since PBHs could fo…
Constraining ultralight vector dark matter with the Parkes Pulsar Timing Array second data release
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang +7
Composed of ultralight bosons, fuzzy dark matter provides an intriguing solution to challenges that the standard cold dark matter model encounters on sub-galactic scales. The ultra…
Search for the Gravitational-wave Background from Cosmic Strings with the Parkes Pulsar Timing Array Second Data Release
Zu-Cheng Chen, Yu-Mei Wu, Qing-Guo Huang
We perform a direct search for an isotropic stochastic gravitational-wave background (SGWB) produced by cosmic strings in the Parkes Pulsar Timing Array second data release. We fin…
Constraints on Primordial-black-hole Population and Cosmic Expansion History from GWTC-3
Zu-Cheng Chen, Shen-Shi Du, Qing-Guo Huang +1
Gravitational waves (GWs) from compact binary coalescences provide an independent probe of the cosmic expansion history other than electromagnetic waves. In this work, we assume th…
Searching for Isotropic Stochastic Gravitational-Wave Background in the International Pulsar Timing Array Second Data Release
Zu-Cheng Chen, Yu-Mei Wu, Qing-Guo Huang
We search for isotropic stochastic gravitational-wave background (SGWB) in the International Pulsar Timing Array second data release. By modeling the SGWB as a power-law, we find v…
Confronting the primordial black hole scenario with the gravitational-wave events detected by LIGO-Virgo
Zu-Cheng Chen, Chen Yuan, Qing-Guo Huang
Adopting a binned method, we model-independently reconstruct the mass function of primordial black holes (PBHs) from GWTC-3 and find that such a PBH mass function can be explained…
Constraining the Polarization of Gravitational Waves with the Parkes Pulsar Timing Array Second Data Release
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang
We search for the isotropic stochastic gravitational-wave background, including the nontensorial polarizations that are allowed in general metric theories of gravity, in the Parkes…
Non-tensorial Gravitational Wave Background in NANOGrav 12.5-Year Data Set
Zu-Cheng Chen, Chen Yuan, Qing-Guo Huang
We perform the first search for an isotropic non-tensorial gravitational-wave background (GWB) allowed in general metric theories of gravity in the North American Nanohertz Observa…
Scalar Induced Gravitational Waves in Different Gauges
Chen Yuan, Zu-Cheng Chen, Qing-Guo Huang
In this letter we calculate the scalar induced gravitational waves (SIGWs) accompanying the formation of primordial black hole during the radiation dominated era in three different…
Pulsar Timing Array Constraints on Primordial Black Holes with NANOGrav 11-Year Data Set
Zu-Cheng Chen, Chen Yuan, Qing-Guo Huang
The detection of binary black hole coalescences by LIGO/Virgo has aroused the interest in primordial black holes (PBHs), because they could be both the progenitors of these black h…
Log-dependent slope of scalar induced gravitational waves in the infrared regions
Chen Yuan, Zu-Cheng Chen, Qing-Guo Huang
We analytically calculate the scalar induced gravitational waves (SIGWs) and find a log-dependent slope of SIGW in the infrared regions , namely $n_{\mathrm{GW}}(f)=3-2/\l…
Probing Primordial-Black-Hole Dark Matter with Scalar Induced Gravitational Waves
Chen Yuan, Zu-Cheng Chen, Qing-Guo Huang
The possibility that primordial black holes (PBHs) represent all of the dark matter (DM) in the Universe and explain the coalescences of binary black holes detected by LIGO/Virgo h…