Exécution de notre outil de synthèse sur un nouvel article
Vérifiez l’article ci-dessous, puis lancez sa synthèse.
PSR J2150+3427: A Possible Double Neutron Star System
Q. D. Wu (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Na Wang (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), J. P. Yuan (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Di Li (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Pei Wang (Chinese Academy of Sciences, Beijing Normal University), Mengyao Xue (Chinese Academy of Sciences, National Astronomical Observatories), Weiwei Zhu (Chinese Academy of Sciences, Beijing Normal University), Chenchen Miao (Zhejiang Lab), W. M. Yan (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Jingbo Wang (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Jumei Yao (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Shuangqiang Wang (Chinese Academy of Sciences, Fudan University), S. N. Sun (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), F. F. Kou (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), D. Zhao (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Yifan Chen (Chinese Academy of Sciences, National Astronomical Observatories), S. J. Dang (Guizhou Normal University), Yi Feng (Zhejiang Lab), Z. J. Liu (Guizhou Normal University), X. L. Miao (Chinese Academy of Sciences, National Astronomical Observatories), Lingqi Meng (Chinese Academy of Sciences, National Astronomical Observatories), Mao Yuan (Chinese Academy of Sciences, National Astronomical Observatories), Chenhui Niu (Chinese Academy of Sciences, Central China Normal University), Jiarui Niu (Chinese Academy of Sciences, National Astronomical Observatories), Lei Qian (Chinese Academy of Sciences, National Astronomical Observatories), Shen Wang (Chinese Academy of Sciences, Fudan University), Xiaoyao Xie (Guizhou Normal University), Yue Xiao (Guizhou University), Youling Yue (Chinese Academy of Sciences, National Astronomical Observatories), S. P. You (Guizhou Normal University), Xiaohui Yu (Guizhou Normal University), Ru-Shuang Zhao (Guizhou Normal University), Rai Yuen (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Xia Zhou (Chinese Academy of Sciences, Xinjiang Astronomical Observatory), Lei Zhang (Chinese Academy of Sciences, National Astronomical Observatories)
Résumé : Abstract PSR J2150+3427 is a 0.654 s pulsar discovered by the Commensal Radio Astronomy FAST Survey. From the follow-up observations, we find that the pulsar is in a highly eccentric orbit (e = 0.601) with an orbital period of 10.592 days and a projected semimajor axis of 25.488 lt-s. Using 2.7 yr of timing data, we also measured the rate of periastron advance ω ̇ = 0.0115(4) deg yr−1. An estimate for the total mass of the system using the ω ̇ gives M tot = 2.59(13)M ⊙, which is consistent with most of the known double neutron star (DNS) systems and one neutron star (NS)–white dwarf (WD) system named B2303+46. Combining ω ̇ with the mass function of the system gives the masses of M p < 1.67 and M c > 0.98 M ⊙ for the pulsar and the companion star, respectively. This constraint, along with the spin period and orbital parameters, suggests that it is possibly a DNS system, and we cannot entirely rule out the possibility of an NS–WD system. Future timing observations will vastly improve the uncertainty in ω ̇ , and are likely to allow the detection of additional relativistic effects, which can be used to modify the values of M p and M c . With a spin-down luminosity of E ̇ = 5.07(6) × 1029 erg s−1, PSR J2150+3427 is a very low-luminosity pulsar, with only the binary pulsar J2208+4610 having a smaller E ̇ .