Principles of Gravitational-Wave Detection with Pulsar Timing Arrays by Michele Maiorano, Francesco De Paolis, Achille A. Nucita

“…In particular, pulsar timing arrays make use of a set of extremely well-timed pulsars and their time correlations as a challenging detector of gravitational waves. …”
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Overlap reduction function for pulsar timing arrays in an expanding Universe by Qing-Hua Zhu

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Pulsar timing array observations as possible hints for nonsingular cosmology by Mian Zhu, Gen Ye, Yong Cai

“…Abstract Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). …”
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Relic gravitons and pulsar timing arrays: a theoretical viewpoint by Massimo Giovannini

“…Abstract During the last 3 years the pulsar timing arrays reported a series of repeated evidences of gravitational radiation (with stochastically distributed Fourier amplitudes) at a benchmark frequency of the order of 30 nHz and characterized by spectral energy densities (in critical units) ranging between $$10^{-8}$$ 10 - 8 and $$10^{-9}$$ 10 - 9 . …”
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Wide-band Timing of the Parkes Pulsar Timing Array UWL Data by Małgorzata Curyło, Timothy T. Pennucci, Matthew Bailes, N. D. Ramesh Bhat, Andrew D. Cameron, Shi Dai, George Hobbs, Agastya Kapur, Richard N. Manchester, Rami Mandow, Matthew T. Miles, Christopher J. Russell, Daniel J. Reardon, Ryan M. Shannon, Renée Spiewak, Willem van Straten, Xing-Jiang Zhu, Andrew Zic

“…Here we present the analysis of a 3 yr data set of 35 ms pulsars observed with the UWL by the Parkes Pulsar Timing Array, using wide-band timing methods. The two key differences compared to typical narrowband methods are (1) generation of two-dimensional templates accounting for pulse shape evolution with frequency and (2) simultaneous measurements of the pulse time of arrival (TOA) and dispersion measure (DM). …”
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Search for an Isotropic Gravitational-wave Background with the Parkes Pulsar Timing Array by Daniel J. Reardon, Andrew Zic, Ryan M. Shannon, George B. Hobbs, Matthew Bailes, Valentina Di Marco, Agastya Kapur, Axl F. Rogers, Eric Thrane, Jacob Askew, N. D. Ramesh Bhat, Andrew Cameron, Małgorzata Curyło, William A. Coles, Shi Dai, Boris Goncharov, Matthew Kerr, Atharva Kulkarni, Yuri Levin, Marcus E. Lower, Richard N. Manchester, Rami Mandow, Matthew T. Miles, Rowina S. Nathan, Stefan Osłowski, Christopher J. Russell, Renée Spiewak, Songbo Zhang, Xing-Jiang Zhu

“…Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). …”
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Axionic domain walls at Pulsar Timing Arrays: QCD bias and particle friction by Simone Blasi, Alberto Mariotti, Aäron Rase, Alexander Sevrin

“…Abstract The recent results from the Pulsar Timing Array (PTA) collaborations show the first evidence for the detection of a stochastic background of gravitational waves at the nHz frequencies. …”
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Null energy condition violation during inflation and pulsar timing array observations by Gen Ye, Mian Zhu, Yong Cai

“…Abstract Recently, evidence of stochastic gravitational wave background (SGWB) signals observed by pulsar timing array (PTA) collaborations, has prompted investigations into their origins. …”
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Exploring Proxies for the Supermassive Black Hole Mass Function: Implications for Pulsar Timing Arrays by Joseph Simon

“…The population of binary SMBHs, which form following galaxy mergers, is expected to produce a gravitational-wave background (GWB) detectable by pulsar timing arrays (PTAs). PTAs are starting to see hints of what may be a GWB, and the amplitude of the emerging signal is toward the higher end of model predictions. …”
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Stochastic Wave Dark Matter with Fermi-LAT γ-Ray Pulsar Timing Array by Hoang Nhan Luu, Tao Liu, Jing Ren, Tom Broadhurst, Ruizhi Yang, Jie-Shuang Wang, Zhen Xie

“…Pulsar timing arrays (PTAs) can detect disturbances in the fabric of spacetime on a galactic scale by monitoring the arrival time of pulses from millisecond pulsars (MSPs). …”
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Pulsar timing arrays and primordial black holes from a supercooled phase transition by Alberto Salvio

“…An explicit realistic model featuring a supercooled phase transition, which allows us to explain the background of gravitational waves recently detected by pulsar timing arrays, is constructed. In this model the phase transition corresponds to radiative symmetry breaking (and mass generation) in a dark sector featuring a dark photon associated with the broken symmetry. …”
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High-precision search for dark photon dark matter with the Parkes Pulsar Timing Array by Xiao Xue, Zi-Qing Xia, Xingjiang Zhu, Yue Zhao, Jing Shu, Qiang Yuan, N. D. Ramesh Bhat, Andrew D. Cameron, Shi Dai, Yi Feng, Boris Goncharov, George Hobbs, Eric Howard, Richard N. Manchester, Aditya Parthasarathy, Daniel J. Reardon, Christopher J. Russell, Ryan M. Shannon, Renée Spiewak, Nithyanandan Thyagarajan, Jingbo Wang, Lei Zhang, Songbo Zhang

“…In this study, we search for evidence of ultralight dark photon dark matter (DPDM) using 14-year high-precision observations of 26 pulsars collected with the Parkes Pulsar Timing Array. While no statistically significant signal is found, we place constraints on coupling constants for the U(1)_{B} and U(1)_{B−L} DPDM. …”
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Implementation of an Efficient Bayesian Search for Gravitational-wave Bursts with Memory in Pulsar Timing Array Data by Jerry Sun, Paul T. Baker, Aaron D. Johnson, Dustin R. Madison, Xavier Siemens

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Search for the Gravitational-wave Background from Cosmic Strings with the Parkes Pulsar Timing Array Second Data Release by 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 (PPTA) Data Release 2 (DR2). We find no evidence for such an SGWB, and therefore place a 95% confidence level upper limit on the cosmic string tension, G μ , as a function of the reconnection probability, p , which can be less than 1 in the string-theory-inspired models or pure Yang–Mills theory. …”
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Pulsar Timing Array Detections of Supermassive Binary Black Holes: Implications from the Detected Common Process Signal and Beyond by Yunfeng Chen, Qingjuan Yu, Youjun Lu

“…Pulsar timing arrays (PTAs) are anticipated to detect the stochastic gravitational-wave background (GWB) from supermassive binary black holes (BBHs) as well as the gravitational waves from individual BBHs. …”
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The Gravitational-wave Background Null Hypothesis: Characterizing Noise in Millisecond Pulsar Arrival Times with the Parkes Pulsar Timing Array by Daniel J. Reardon, Andrew Zic, Ryan M. Shannon, Valentina Di Marco, George B. Hobbs, Agastya Kapur, Marcus E. Lower, Rami Mandow, Hannah Middleton, Matthew T. Miles, Axl F. Rogers, Jacob Askew, Matthew Bailes, N. D. Ramesh Bhat, Andrew Cameron, Matthew Kerr, Atharva Kulkarni, Richard N. Manchester, Rowina S. Nathan, Christopher J. Russell, Stefan Osłowski, Xing-Jiang Zhu

“…Here we describe the noise models developed for each of the MSPs in the Parkes Pulsar Timing Array (PPTA) third data release, which have been used as the basis of a search for the isotropic stochastic GW background. …”
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Search for scalar induced gravitational waves in the international pulsar timing array data release 2 and NANOgrav 12.5 years datasets by Virgile Dandoy, Valerie Domcke, Fabrizio Rompineve

“…We perform a Bayesian search in the latest Pulsar Timing Array (PTA) datasets for a stochastic gravitational wave (GW) background sourced by curvature perturbations at scales $10^5$ Mpc$^{-1}\lesssim$ k$\lesssim 10^8$ Mpc$^{-1}$. …”
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Multi-messenger Approaches to Supermassive Black Hole Binary Detection and Parameter Estimation. II. Optimal Strategies for a Pulsar Timing Array by Tingting Liu, Tyler Cohen, Casey McGrath, Paul B. Demorest, Sarah J. Vigeland

“…Pulsar timing arrays (PTAs) are Galactic-scale gravitational wave (GW) detectors consisting of precisely timed pulsars distributed across the sky. …”
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Implications of pulsar timing array data for scalar-induced gravitational waves and primordial black holes: Primordial non-Gaussianity f_{NL} considered by Sai Wang, Zhi-Chao Zhao, Jun-Peng Li, Qing-Hua Zhu

“…Multiple pulsar-timing-array collaborations have reported strong evidence for the existence of a gravitational-wave background. …”
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Single field inflation in the light of Pulsar Timing Array Data: quintessential interpretation of blue tilted tensor spectrum through Non-Bunch Davies initial condition by Sayantan Choudhury

“…Abstract In this work, we present a quintessential interpretation of having a blue-tilted tensor power spectrum for canonical single-field slow-roll inflation to explain the recently observed Pulsar Timing Array (NANOGrav 15-year and EPTA) signal of Gravitational Waves (GW). …”
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