Pulsar Timing Arrays - challenges and current status
Sign Up to like & getrecommendations! Published in 2025 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ae19c2
Abstract: This review summarises recent progress in pulsar timing array research and the current status of nanohertz gravitational wave astronomy. I outline the techniques enabling decade-long, sub-microsecond-precision timing, present results from PTA collaborations between 2023–2025, and… read more here.
Keywords: timing arrays; pulsar timing; current status; arrays challenges ... See more keywords
Searching for bispectrum of stochastic gravitational waves with pulsar timing arrays
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/03/032
Abstract: We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries… read more here.
Keywords: gravitational waves; stochastic gravitational; timing arrays; waves pulsar ... See more keywords
Testing No slip model with pulsar timing arrays: NANOGrav and IPTA
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2024/12/045
Abstract: We perform an observational study of modified gravity considering a potential inflationary interpretation of pulsar timing arrays (PTA). We use a motivated model known as no slip in which the gravitational wave propagation is modified.… read more here.
Keywords: pulsar timing; testing slip; model; timing arrays ... See more keywords
Overlap reduction functions for pulsar timing arrays and astrometry
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.110.063547
Abstract: We present an efficient technique for calculating the angular two-point correlation functions (or ``overlap reduction functions'') induced by gravitational waves in both the pulse arrival times of pulsars and in the angular deflections of distant… read more here.
Keywords: functions pulsar; pulsar timing; overlap reduction; timing arrays ... See more keywords
Orthonormal bases for reconstructing pairwise interpulsar correlations in pulsar timing arrays
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.110.104066
Abstract: For pulsar timing arrays (PTAs), the telltale signature of an isotropic stochastic background of gravitational waves is a pattern of pairwise interpulsar timing correlations approximately following the Hellings&Downs (HD) curve. Certain systematic errors and new… read more here.
Keywords: interpulsar correlations; timing arrays; pulsar timing; pairwise interpulsar ... See more keywords
Noise-marginalized optimal statistic: A robust hybrid frequentist-Bayesian statistic for the stochastic gravitational-wave background in pulsar timing arrays
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.044003
Abstract: Observations have revealed that nearly all galaxies contain supermassive black holes (SMBHs) at their centers. When galaxies merge, these SMBHs form SMBH binaries (SMBHBs) that emit low-frequency gravitational waves (GWs). The incoherent superposition of these… read more here.
Keywords: optimal statistic; marginalized optimal; timing arrays; background ... See more keywords