TOI-1696 and TOI-2136: Constraining the Masses of Two Mini-Neptunes with the Habitable-Zone Planet Finder-猫眼课题宝

DOI：

10.3847/1538-3881/ac69ec

发表时间：

2022-04

期刊：

The Astronomical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

C. Beard;Paul Robertson;S. Kanodia;J. Libby-Roberts;C. Cañas;Arvind F. Gupta;R. Holcomb;Sinclaire Jones;H. Kobulnicky;Andrea S. J. Lin;J. Lubin;M. Maney;B. Parker;G. Stefansson;W. Cochran;M. Endl;L. Hebb;S. Mahadevan;J. Wisniewski;C. Bender;S. Diddams;M. Everett;C. Fredrick;S. Halverson;F. Hearty;A. Metcalf;A. Monson;J. Ninan;Arpita Roy;Mary C. Schutte;C. Schwab;R. Terrien

我们给出了两颗围绕M矮星运行的行星TOI-1696b和TOI-2136b的验证结果。这两颗行星都是围绕附近恒星运行的微型海王星，这使得它们在詹姆斯·韦伯太空望远镜(JWST)的大气表征方面前景看好。我们使用高对比度成像、地面测光和近红外线径向速度验证了两个候选者的行星性质。自适应光学图像是使用3米谢恩望远镜上的ShARCS相机拍摄的。散斑图像是使用WIYN 3.5米望远镜上的NN-Explore系外行星恒星散斑成像仪拍摄的。利用凌日系外行星勘测卫星、阿帕奇点天文台3.5米ARC望远镜上的漫射器辅助天体物理研究联盟(ARC)望远镜成像相机(北极)成像器和Red Buttes天文台0.6米望远镜的组合，精炼了半径和轨道星历。我们使用10米霍比-埃伯利望远镜上的宜居区行星探测器获得了径向速度，这使我们能够对两颗凌日行星的质量设定上限。TOI-1696b(P=2.5d；Rp=3.24R⊕；Mp&lt；56.6M⊕)在参数空间中属于稀疏区域，考虑到其主星的温度(Tef=3168K，M4.5)，因为像它这样大小的行星在M型中晚期矮星附近是相当罕见的。另一方面，TOI-2136b(P=7.85d；Rp=2.09R⊕；Mp&lt；15.0M⊕)是一个很好的大气跟踪候选方案。

We present the validation of two planets orbiting M dwarfs, TOI-1696b and TOI-2136b. Both planets are mini-Neptunes orbiting nearby stars, making them promising prospects for atmospheric characterization with the James Webb Space Telescope (JWST). We validated the planetary nature of both candidates using high-contrast imaging, ground-based photometry, and near-infrared radial velocities. Adaptive optics images were taken using the ShARCS camera on the 3 m Shane Telescope. Speckle images were taken using the NN-Explore Exoplanet Stellar Speckle Imager on the WIYN 3.5 m telescope. Radii and orbital ephemerides were refined using a combination of the Transiting Exoplanet Survey Satellite, the diffuser-assisted Astrophysical Research Consortium (ARC) Telescope Imaging Camera (ARCTIC) imager on the 3.5 m ARC telescope at Apache Point Observatory, and the 0.6 m telescope at Red Buttes Observatory. We obtained radial velocities using the Habitable-Zone Planet Finder on the 10 m Hobby–Eberly Telescope, which enabled us to place upper limits on the masses of both transiting planets. TOI-1696b (P = 2.5 days; R p = 3.24 R ⊕; M p < 56.6 M ⊕) falls into a sparsely populated region of parameter space considering its host star’s temperature (T eff = 3168 K, M4.5), as planets of its size are quite rare around mid- to late-M dwarfs. On the other hand, TOI-2136b (P = 7.85 days; R p = 2.09 R ⊕; M p < 15.0 M ⊕) is an excellent candidate for atmospheric follow-up with the JWST.

TOI-1696 and TOI-2136: Constraining the Masses of Two Mini-Neptunes with the Habitable-Zone Planet Finder

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