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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.03079 |
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| _version_ | 1866917244365176832 |
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| author | Luo, Yu-Feng Weng, Shan-Shan Liu, Qing-Zhong Ge, Ming-Yu Peng, Han-Long Zhou, Shi-Qi Gao, Shi-Jie Zheng, Yu-Jia Zhang, Yan |
| author_facet | Luo, Yu-Feng Weng, Shan-Shan Liu, Qing-Zhong Ge, Ming-Yu Peng, Han-Long Zhou, Shi-Qi Gao, Shi-Jie Zheng, Yu-Jia Zhang, Yan |
| contents | PSR~J2032+4127 is the only one of gamma-ray binary, that exhibits pulsations in gamma-ray. Previous research has indicated that the pulsar and the Be star MT91 213 orbit each other in a highly eccentric orbit with an extremely long period, with the pulsar reaching its periastron on November 13, 2017. Since its launch, the \fermi{} satellite has been monitoring this pulsar for 16 years, covering the 8 years before and the 8 years after the pulsar passed its periastron. Using these data, we present an analysis of pulse arrival times, and precisely determine the orbital parameters for the first time: the orbital period of $P_{\rm orb} \sim 52.3$ yr, the eccentricity of $e \sim 0.98$, the semimajor axis of $a$sin$i \sim 25.3$ AU, and the orbital inclination of $\sim$ 47.1$^\circ$ -- 55.1$^\circ$. We also reveal another small glitch occurred in 2021, MJD $\sim$ 59500. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_03079 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The orbital parameters of gamma-ray binary PSR~J2032+4127 Luo, Yu-Feng Weng, Shan-Shan Liu, Qing-Zhong Ge, Ming-Yu Peng, Han-Long Zhou, Shi-Qi Gao, Shi-Jie Zheng, Yu-Jia Zhang, Yan High Energy Astrophysical Phenomena PSR~J2032+4127 is the only one of gamma-ray binary, that exhibits pulsations in gamma-ray. Previous research has indicated that the pulsar and the Be star MT91 213 orbit each other in a highly eccentric orbit with an extremely long period, with the pulsar reaching its periastron on November 13, 2017. Since its launch, the \fermi{} satellite has been monitoring this pulsar for 16 years, covering the 8 years before and the 8 years after the pulsar passed its periastron. Using these data, we present an analysis of pulse arrival times, and precisely determine the orbital parameters for the first time: the orbital period of $P_{\rm orb} \sim 52.3$ yr, the eccentricity of $e \sim 0.98$, the semimajor axis of $a$sin$i \sim 25.3$ AU, and the orbital inclination of $\sim$ 47.1$^\circ$ -- 55.1$^\circ$. We also reveal another small glitch occurred in 2021, MJD $\sim$ 59500. |
| title | The orbital parameters of gamma-ray binary PSR~J2032+4127 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2602.03079 |