Searching for Gravitational-Wave Bursts from Cosmic String Cusps with the Parkes Pulsar Timing Array’s Third Data Release

Pulsar timing arrays (PTAs) are designed to detect nanohertz-frequency gravitational waves (GWs). Since GWs are anticipated from cosmic strings, PTAs offer a viable approach to testing their existence. We present the results of the first Bayesian search for gravitational-wave bursts from cosmic string cusps (GWCSs) using the third PPTA data release for 30 ms pulsars. In this data collection, we find no evidence for GWCS signals. We compare a model with a GWCS signal to one with only noise, including a common spatially uncorrelated red noise (CURN), and find that our data are more consistent with the noise-only model. We then establish upper limits on the strain amplitude of GWCSs at the pulsar term, based on the analysis of 30 ms pulsars, after finding no compelling evidence. We find the addition of a CURN with different spectral indices into the noise model has a negligible impact on the upper limits. And the upper limit range of the amplitude of the pulsar-term GWCSs is concentrated between 10−12 and 10−11. Finally, we set upper limits on the amplitude of GWCS events, parametrized by width and event epoch, for a single-pulsar PSR J1857 + 0943. Moreover, we derive the upper limit on the cosmic string tension as a function of burst width and compare it with previous results.

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Journal
Universe
Published
2025-03-01
DOI
https://doi.org/10.3390/universe11030081
Citations
1
Primary Topic
Pulsars and Gravitational Waves Research
Type
article
Field-Weighted Citation Impact
1.15

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article

Searching for Gravitational-Wave Bursts from Cosmic String Cusps with the Parkes Pulsar Timing Array’s Third Data Release

Saurav Mishra, Sachiko Kuroyanagi, Craig Russell, Valentina Di Marco et al.
1 citations
Universe
Pulsars and Gravitational Waves Research
1.15
article

Searching for Gravitational-Wave Bursts from Cosmic String Cusps with the Parkes Pulsar Timing Array’s Third Data Release

Saurav Mishra, Sachiko Kuroyanagi, Craig Russell, Valentina Di Marco, Jing Zou, X. J. Zhu, Yi Feng, Degang Zhao, W. M. Yan, Agastya Kapur, Jingbo Wang, Yong Xia, Shuangqiang Wang, Yirong Wen
article en
1 citations

Abstract

Pulsar timing arrays (PTAs) are designed to detect nanohertz-frequency gravitational waves (GWs). Since GWs are anticipated from cosmic strings, PTAs offer a viable approach to testing their existence. We present the results of the first Bayesian search for gravitational-wave bursts from cosmic string cusps (GWCSs) using the third PPTA data release for 30 ms pulsars. In this data collection, we find no evidence for GWCS signals. We compare a model with a GWCS signal to one with only noise, including a common spatially uncorrelated red noise (CURN), and find that our data are more consistent with the noise-only model. We then establish upper limits on the strain amplitude of GWCSs at the pulsar term, based on the analysis of 30 ms pulsars, after finding no compelling evidence. We find the addition of a CURN with different spectral indices into the noise model has a negligible impact on the upper limits. And the upper limit range of the amplitude of the pulsar-term GWCSs is concentrated between 10−12 and 10−11. Finally, we set upper limits on the amplitude of GWCS events, parametrized by width and event epoch, for a single-pulsar PSR J1857 + 0943. Moreover, we derive the upper limit on the cosmic string tension as a function of burst width and compare it with previous results.

UniverseVol. 11(3)
Commonwealth Scientific and Industrial Research Organisation (AU), Australia Telescope National Facility (AU), Australian Research Council (AU), Chinese Academy of Sciences (CN), Beijing Normal University (CN), Xinjiang Astronomical Observatory (CN), Lishui University (CN), Zhejiang Lab (CN), ARC Centre of Excellence for Gravitational Wave Discovery (AU), University of Chinese Academy of Sciences (CN), Monash University (AU), Swinburne University of Technology (AU), Nagoya University (JP), Universidad Autónoma de Madrid (ES), Zhejiang University (CN), Macquarie University (AU)
National Natural Science Foundation of China, West Light Foundation of the Chinese Academy of Sciences, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 21%
Pulsars and Gravitational Waves Research
1.15
DOIOpen Access PDFOpenAlex
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