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：

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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。