76 citations · 523 across the 22 of their papers we have counts for
22 papers
Pulsar Timing Response and Spatial Correlations of Shear Modes in Torsionless Palatini Spacetime
Tian-Shi Li, Yu-Mei Wu, Chang Liu
In the nanohertz band, spatial correlations between pulsar timing residuals provide a key observable for characterizing stochastic gravitational-wave backgrounds and probing their…
Constraints on the Primordial Black Hole Abundance using Pulsar Parameter Drifts
Yan-Chen Bi, Yu-Mei Wu, Qing-Guo Huang
Primordial black holes (PBHs) provide a compelling interpretation for the binary black holes (BBHs) observed by ground-based gravitational-wave (GW) detectors, especially for those…
Harmonic Analysis on Correlation for Gravitational-Wave Backgrounds of Arbitrary Polarization from Interfering Sources in Generic Dispersion Relation
Yan-Chen Bi, Yu-Mei Wu, Qing-Guo Huang
The Hellings-Downs (HD) correlation serves as the fundamental benchmark for detecting the gravitational-wave background (GWB) in pulsar timing arrays (PTAs) within General Relativi…
Targeted search for an individual SMBHB in NANOGrav 15-year and EPTA DR2 data sets
Li-Wen Tian, Yan-Chen Bi, Yu-Mei Wu +1
While pulsar timing array (PTA) collaborations have reported evidence for a stochastic gravitational wave background (GWB), the detection of continuous gravitational waves (GWs) fr…
Spatial Correlation between Pulsars from Interfering Gravitational-Wave Sources in Massive Gravity
Yu-Mei Wu, Yan-Chen Bi, Qing-Guo Huang
In the nanohertz band, the spatial correlations in pulsar timing arrays (PTAs) produced by interfering gravitational waves (GWs) from multiple sources likely deviate from the tradi…
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…
Constraining ultralight scalar dark matter couplings with the European Pulsar Timing Array second data release
Yu-Mei Wu, Qing-Guo Huang
Pulsar Timing Arrays (PTAs) offer an independent method for searching for ultralight dark matter (ULDM), whose wavelike nature induces periodic oscillations in the arrival times of…
The spatial correlations between pulsars for interfering sources in Pulsar Timing Array and evidence for gravitational-wave background in NANOGrav 15-year data set
Yu-Mei Wu, Yan-Chen Bi, Qing-Guo Huang
Pulsar timing arrays (PTAs), aimed at detecting gravitational waves (GWs) in the nHz range, have recently made significant strides. Compelling evidence has emerged for…
GWnext 2024: Meeting Summary
Alejandro Torres-Orjuela, Veronica Vazquez-Aceves, Rui Xu +19
GWnext 2024 was a meeting held in the Kavli Institute for Astronomy and Astrophysics at Peking University in March , 2024. In the meeting researchers at…
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…
Prospects for Taiji to detect a gravitational-wave background from cosmic strings
Zu-Cheng Chen, Qing-Guo Huang, Chang Liu +6
Recently, multiple pulsar timing array collaborations have presented compelling evidence for a stochastic signal at nanohertz frequencies, potentially originating from cosmic strin…
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…
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…
Pulsar timing residual induced by ultralight tensor dark matter
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang
Ultralight boson fields, with a mass around , are promising candidates for the elusive cosmological dark matter. These fields induce a periodic oscillation of th…
Search for Stochastic Gravitational-Wave Background from Massive Gravity in the NANOGrav 12.5-Year Data Set
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang
Gravitational waves offer a new window to probe the nature of gravity, including answering if the mediating particle, graviton, has a non-zero mass or not. Pulsar timing arrays mea…
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…
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…
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…
Parameterized second post-Newtonian framework with conservation Laws
Yu-Mei Wu, Qing-Guo Huang
We parameterize the second post-Newtonian (2PN) metric for a gravitating system of fluids in the generalized harmonic gauge, and find that there are only three independent 2PN para…