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Detection of Coherent Pulsation Modes in the Strongly Magnetic Of?p Star NGC 1624-2 using TESS Observation
Research Notes of the AAS Pub Date : 2020-09-20 , DOI: 10.3847/2515-5172/abb9a2
D. W. Kurtz 1, 2 , S. Hubrig 3 , S. P. Jrvinen 3 , M. Schller 4
Affiliation  

High-cadence Transiting Exoplanet Survey Satellite (TESS) observations are promising for studies of short-term pulsational variability in magnetic O stars, which usually have long rotation periods of the order of months or years. The Of?p star NGC 1624-2 is of special interest as it possesses the strongest magnetic field measured among O stars, together with a giant magnetosphere. We detect three significant low-frequency peaks in TESS 2 minute cadence data, probably corresponding to coherent g mode pulsations. At present, this is the only magnetic O star for which pulsational variability is detected.

中文翻译:

利用TESS观测技术检测强磁Of星NGC 1624-2中的相干脉动模式

高速度过境行星外行星调查卫星(TESS)的观测有望用于研究磁性O恒星的短期脉动变异性,这些O恒星通常具有数月或数年的长旋转周期。Of?p恒星NGC 1624-2具有O恒星中测得的最强磁场以及巨大的磁层,因此特别受关注。我们在TESS 2分钟的节奏数据中检测到三个重要的低频峰,可能对应于相干的g模式脉动。目前,这是唯一一个检测到脉动变化的磁性O星。
更新日期:2020-09-22
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