2024
DOI: 10.1051/0004-6361/202449483
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Beyond the Hellings–Downs curve: Non-Einsteinian gravitational waves in pulsar timing array correlations

Reginald Christian Bernardo,
Kin-Wang Ng

Abstract: Pulsar timing arrays (PTAs) have revealed galaxy-size gravitational waves (GWs) in the form of a stochastic gravitational wave background (SGWB), correlating the radio pulses emitted by millisecond pulsars. This discovery naturally leads to the question of the origin and the nature of the SGWB; the latter is synonymous to testing how quadrupolar the inter-pulsar spatial correlation is. In this paper, we investigate the nature of the SGWB by considering correlations beyond the Hellings-Downs (HD) curve of Einst… Show more

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Cited by 3 publications
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