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arXiv · 2501.03912

Pulsar timing in the Galactic Center

Riccardo Della Monica·Ivan de Martino
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Abstract

We propose a novel approach which implements the relativistic calculations of the photon travel time into a robust timing model for pulsars orbiting supermassive black holes. We demonstrate that timing models relying on the lowest-order (1PN) post-Newtonian approximation can produce significant discrepancies in strong-field configurations, affecting the predicted relativistic times of arrival at an Earth-based observatory. We also show how a misestimation of the pulsar parameters can lead to the appearance of phase-dependent residual, which hints at a tremendous constraining power of the binary and intrinsic parameters for timing observations of potential pulsars at the Galactic Center.

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Riccardo Della Monica, Ivan de Martino. 2025-01-07. Pulsar timing in the Galactic Center. https://arxiv.org/abs/2501.03912

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