分类： 天文学 >> 天文学 提交时间： 2023-02-19
Dong-Xiang Shen
Jin-Zhong Liu
Chun-Hua Zhu
Guo-Liang Lv
Yu Zhang
Cheng-Long Lv
Hao-Zhi Wang
Lei Li
Xi-Zhen Lu
Jin-Long Yu
Abdurepqet Rustem
摘要： We first present the multicolor photometry results of the rapidly rotating magnetic star HD 345439 using the Nanshan One-meter Wide-field Telescope. From the photometric observations, we derive a rotational period of 0.7699\pm0.0014 day. The light curves of HD 345439 are dominated by the double asymmetric S-wave feature that arises from the magnetic clouds. Pulsating behaviors are not observed in Sector 41 of the Transiting Exoplanet Survey Satellite. No evidence is found of the occurrence of centrifugal breakout events neither in the residual flux nor in the systematic variations at the extremum of the light curve. Based on the hypothesis of the Rigidly Rotating Magnetosphere model, we restrict the magnetic obliquity angle {\beta} and the rotational inclination angle i so that they satisfy the approximate relation {\beta + i \approx 105^{\circ}}. The colour excess, extinction, and luminosity are determined to be E_{(B-V)}=0.745\pm0.016\,mag, A_{V}=2.31\pm0.05\,mag, and \rm log\,(L/L_{\odot})=3.82\pm0.1 dex, respectively. Furthermore, we derive the effective temperature as T\rm _{eff}=22\pm1 kK and the surface gravity as logg=4.00\pm0.22. The mass M=7.24_{-1.24}^{+1.75}\rm M_{\odot}, radius R=4.44_{-1.93}^{+2.68}\rm R_{\odot}, and age\rm \tau_{age}=23.62\,_{-21.97}^{+4.24} Myr are estimated from the Hertzsprung--Russell Diagram
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Dong-Xiang Shen
Jin-Zhong Liu
Chun-Hua Zhu
Guo-Liang Lv
Yu Zhang
Cheng-Long Lv
Hao-Zhi Wang
Lei Li
Xi-Zhen Lu
Jin-Long Yu
Abdurepqet Rustem
摘要： We first present the multicolor photometry results of the rapidly rotating magnetic star HD 345439 using the Nanshan One-meter Wide-field Telescope. From the photometric observations, we derive a rotational period of 0.7699\pm0.0014 day. The light curves of HD 345439 are dominated by the double asymmetric S-wave feature that arises from the magnetic clouds. Pulsating behaviors are not observed in Sector 41 of the Transiting Exoplanet Survey Satellite. No evidence is found of the occurrence of centrifugal breakout events neither in the residual flux nor in the systematic variations at the extremum of the light curve. Based on the hypothesis of the Rigidly Rotating Magnetosphere model, we restrict the magnetic obliquity angle {\beta} and the rotational inclination angle i so that they satisfy the approximate relation {\beta + i \approx 105^{\circ}}. The colour excess, extinction, and luminosity are determined to be E_{(B-V)}=0.745\pm0.016\,mag, A_{V}=2.31\pm0.05\,mag, and \rm log\,(L/L_{\odot})=3.82\pm0.1 dex, respectively. Furthermore, we derive the effective temperature as T\rm _{eff}=22\pm1 kK and the surface gravity as logg=4.00\pm0.22. The mass M=7.24_{-1.24}^{+1.75}\rm M_{\odot}, radius R=4.44_{-1.93}^{+2.68}\rm R_{\odot}, and age\rm \tau_{age}=23.62\,_{-21.97}^{+4.24} Myr are estimated from the Hertzsprung--Russell Diagram
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