论文标题
TOI-3884 b：一种罕见的6-r $ _ {\ oplus} $ Planet，它以巨大的且可能的极性斑点跨越低质量的恒星
TOI-3884 b: A rare 6-R$_{\oplus}$ planet that transits a low-mass star with a giant and likely polar spot
论文作者
论文摘要
过渡系外行星调查卫星任务确定了一个深层且非对称的类似的信号，周期性为4.5天，绕M4矮星TOI-3884。通过额外的设施和LAS Cumbres天文台全球望远镜收集的随访观察结果证实了该信号，这些望远镜揭示了传输是色的。光曲线是由一个主机恒星很好地建模的，该恒星具有由6-R $ _ {\ oplus} $ Planet Trans trans的大极点。我们通过观看限制的光度法，高分辨率成像和径向速度来验证行星。 TOI-3884 b，半径为$ 6.00 \ pm 0.18 $ r $ _ {\ oplus} $，是第一个经销Mid-M矮人的亚星期行星。由于宿主恒星的亮度和小尺寸，它具有该行星大小最大的传输光谱指标之一，并成为James Webb太空望远镜和地面望远镜的大气表征的最佳目标。
The Transiting Exoplanet Survey Satellite mission identified a deep and asymmetric transit-like signal with a periodicity of 4.5 days orbiting the M4 dwarf star TOI-3884. The signal has been confirmed by follow-up observations collected by the ExTrA facility and Las Cumbres Observatory Global Telescope, which reveal that the transit is chromatic. The light curves are well modelled by a host star having a large polar spot transited by a 6-R$_{\oplus}$ planet. We validate the planet with seeing-limited photometry, high-resolution imaging, and radial velocities. TOI-3884 b, with a radius of $6.00 \pm 0.18$ R$_{\oplus}$, is the first sub-Saturn planet transiting a mid-M dwarf. Owing to the host star's brightness and small size, it has one of the largest transmission spectroscopy metrics for this planet size and becomes a top target for atmospheric characterisation with the James Webb Space Telescope and ground-based telescopes.
