2020/06/30 by Haruka Suzuki, Priti Gupta, H. Okawa +2
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astronomy #Astrophysics #Binary number #Binary pulsar #Geophysics and Gravity Measurements #Geophysics and Sensor Technology #Mechanism (biology) #Millisecond pulsar #Physics #Pulsar #Pulsars and Gravitational Waves Research #Quantum mechanics #gr-qc
paper · pdf · doi:10.1093/mnras/staa3081
published as Monthly Notices of the Royal Astronomical Society, Volume 500, Issue 2, p.1645-1665 January 2021 · 22 pages, 24 figures, published by MNRAS
openalex publication_date 2020/10/07 · arxiv created 2020/11/05 · arxiv updated 2020/12/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
ABSTRACT We study the Kozai–Lidov mechanism in a hierarchical triple system in detail by the direct integration of the first-order post-Newtonian equations of motion. We analyse a variety of models with a pulsar to evaluate the cumulative shift of the periastron time of a binary pulsar caused by the gravitational wave emission in a hierarchical triple system with Kozai–Lidov mechanism. We compare our results with those by the double-averaging method. The deviation in the eccentricity, even if small, is important in the evaluation of the emission of the gravitational waves. We also calculate the cumulative shift of the periastron time by using obtained osculating orbital elements. If Kozai–Lidov oscillations occur, the cumulative shift curve will bend differently from that of the isolated binary. If such a bending is detected through the radio observation, it will be the first indirect observation of gravitational waves from a triple system.