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Overlap reduction functions for pulsar timing arrays and astrometry

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arxiv 2406.00096 v2 pith:72EG64Z3 submitted 2024-05-31 astro-ph.CO gr-qchep-ph

classification astro-ph.COgr-qchep-ph
keywords angularfunctionsarrivalgravitationaloverlappulsereductiontimes
verification ladder T0 review T1 audit T2 compute T3 formal
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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 sources. In the most general case, there are six auto- and cross-correlations for the pulse arrival times and the two components of the angular deflection. We provide results for spin-2 (i.e., general-relativistic) gravitational waves as well as the spin-1 modes that may arise in alternative-gravity theories. These calculations can be easily implemented for future analysis or study, and we provide code to do so.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Testing General Relativity with Individual Supermassive Black Hole Binaries

    gr-qc 2026-05 unverdicted novelty 6.0 of 10

    Beyond-GR polarization modes in a single supermassive black hole binary show up linearly (not quadratically) in pulsar-timing cross-correlations, massive-graviton dispersion shifts antenna patterns and pulsar-term pha...

  2. Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample

    astro-ph.CO 2025-12 accept novelty 6.0 of 10

    The parity-odd four-point correlation function measured in DESI DR1 LRGs is consistent with zero after correcting for survey-induced covariance mismatches.

  3. New test of modified gravity with gravitational wave experiments

    gr-qc 2025-09 conditional novelty 6.0 of 10

    For a stationary, isotropic gravitational wave background, three-point correlations are produced only by scalar polarizations, giving a new null test for modified gravity.

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