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±0.0014 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 angleβand the rotational inclination angle i so that they satisfy the approximate relationβ+i≈105°.The color excess,extinction,and luminosity are determined to be E_((B-V))=0.745±0.016 mag,A_(V)=2.31±0.05 mag,and log(L/L_(⊙))=3.82±0.1 dex,respectively.Furthermore,we derive the effective temperature as T_(eff)=22±1 kK and the surface gravity as log g=4.00±0.22.The mass M=-7.24_(-1.24)^(+1.75)M_(⊙),radius R=4.44_(-1.93)^(+2.68)R_(⊙),and age τ_(age)=23.62_(-21.97)^(+4.24) Myr are estimated from the Hertzsprung-Russell diagram.
基金
the generous support of the Natural Science Foundation of Xinjiang No.2021D01C075
the National Natural Science Foundation of China under grants U2031204,12163005 and 11863005
the science research grants from the China Manned Space Project with Nos.CMS-CSST-2021-A08 and CMS-CSST-2021-A10
the science research grants from National Key R&D Program of China(2022YFE0126200)
National Major Scientific Project built by the Chinese Academy of Sciences
provided by the National Development and Reform Commission
provided by the NASA Explorer Program
operated by the Association of Universities for Research in Astronomy,Inc.,under NASA contract NAS 526555。
