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arXiv · 1903.00287

Cumulative Shift of Periastron Time of Binary Pulsar with Kozai-Lidov Oscillation

Haruka Suzuki·Priti Gupta·Hirotada Okawa·Kei-ichi Maeda
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Abstract

We study a hierarchical triple system with the Kozai-Lidov mechanism, and analyse the cumulative shift of periastron time of a binary pulsar by the emission of gravitational waves. Time evolution of the osculating orbital elements of the triple system is calculated by directly integrating the first-order post-Newtonian equations of motion. The Kozai-Lidov mechanism will bend the evolution curve of the cumulative shift when the eccentricity becomes large. We also investigate the parameter range of mass and semi-major axis of the third companion with which the bending of the cumulative-shift curve could occur within 100 years.

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Haruka Suzuki, Priti Gupta, Hirotada Okawa, Kei-ichi Maeda. 2019-04-26. Cumulative Shift of Periastron Time of Binary Pulsar with Kozai-Lidov Oscillation. https://doi.org/10.1093/mnrasl%2Fslz058

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