216 citations · 2.3k across the 36 of their papers we have counts for
15 papers · 1 filter
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…
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…
The Parkes Pulsar Timing Array Third Data Release
Andrew Zic, Daniel J. Reardon, Agastya Kapur +31
We present the third data release from the Parkes Pulsar Timing Array (PPTA) project. The release contains observations of 32 pulsars obtained using the 64-m Parkes "Murriyang" rad…
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…
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…
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…