A Framework for Prioritizing the TESS Planetary Candidates Most Amenable to Atmospheric Characterization
A Framework for Prioritizing the TESS Planetary Candidates Most Amenable to Atmospheric Characterization
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DOI：
10.1088/1538-3873/aadf6f
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发表时间：
2018-05
影响因子：
3.5
通讯作者：
E. Kempton;J. Bean;D. Louie;D. Deming;D. Koll;M. Mansfield;J. Christiansen;M. López-Morales;M. Swain;R. Zellem;S. Ballard;T. Barclay;J. Barstow;N. Batalha;T. Beatty;Z. Berta-Thompson;J. Birkby;L. Buchhave;D. Charbonneau;N. Cowan;I. Crossfield;Miguel de Val-Borro;R. Doyon;D. Dragomir;E. Gaidos;K. Heng;R. Hu;S. Kane;L. Kreidberg;M. Mallonn;C. Morley;N. Narita;V. Nascimbeni;E. Pallé;E. Quintana;E. Rauscher;S. Seager;E. Shkolnik;D. Sing;A. Sozzetti;K. Stassun;J. Valenti;C. V. Essen
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文献类型：
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作者：
E. Kempton;J. Bean;D. Louie;D. Deming;D. Koll;M. Mansfield;J. Christiansen;M. López-Morales;M. Swain;R. Zellem;S. Ballard;T. Barclay;J. Barstow;N. Batalha;T. Beatty;Z. Berta-Thompson;J. Birkby;L. Buchhave;D. Charbonneau;N. Cowan;I. Crossfield;Miguel de Val-Borro;R. Doyon;D. Dragomir;E. Gaidos;K. Heng;R. Hu;S. Kane;L. Kreidberg;M. Mallonn;C. Morley;N. Narita;V. Nascimbeni;E. Pallé;E. Quintana;E. Rauscher;S. Seager;E. Shkolnik;D. Sing;A. Sozzetti;K. Stassun;J. Valenti;C. V. Essen
最近发射的凌日系外行星勘测卫星（TESS）使命的一个关键遗产将是为天文学界提供许多最佳的凌日系外行星目标，以进行大气特征描述。然而，要充分利用这一机会，时间至关重要。詹姆斯·韦伯太空望远镜（JWST）虽然被推迟，但仍将在时间轴上完成其名义上的五年使命，这将促使TESS对顶级大气特征目标进行快速识别、确认和质量测量。除了JWST之外，未来的大气研究专门任务，如大气遥感红外系外行星大型巡天（ARIEL），需要发现和确认数百个额外的亚木星大小的行星（Rp < 10 R），这些行星围绕明亮的恒星运行，而不是今天已知的行星，以确保成功的系外行星大气统计普查。地面超大望远镜（ELT）也将有助于测量TESS发现的凌日行星的大气层。在这里，我们提出了一组两个简单的分析指标，量化预期的信号噪声传输和热发射光谱为一个给定的行星，这将使顶级大气表征目标之间的TESS行星候选人很容易确定。满足我们提出的这些指标阈值的目标将被鼓励通过径向速度质量测量进行快速跟踪和确认。基于Sullivan等人的模拟TESS检测目录，我们确定了度量的适当截止值，使得TESS使命最终将在一系列行星大小的箱中产生1000个高质量大气表征目标的样本，这些箱向下延伸到地球大小的潜在可居住世界。
A key legacy of the recently launched the Transiting Exoplanet Survey Satellite (TESS) mission will be to provide the astronomical community with many of the best transiting exoplanet targets for atmospheric characterization. However, time is of the essence to take full advantage of this opportunity. The James Webb Space Telescope (JWST), although delayed, will still complete its nominal five year mission on a timeline that motivates rapid identification, confirmation, and mass measurement of the top atmospheric characterization targets from TESS. Beyond JWST, future dedicated missions for atmospheric studies such as the Atmospheric Remote-sensing Infrared Exoplanet Large-survey (ARIEL) require the discovery and confirmation of several hundred additional sub-Jovian size planets (Rp < 10 R⊕) orbiting bright stars, beyond those known today, to ensure a successful statistical census of exoplanet atmospheres. Ground-based extremely large telescopes (ELTs) will also contribute to surveying the atmospheres of the transiting planets discovered by TESS. Here we present a set of two straightforward analytic metrics, quantifying the expected signal-to-noise in transmission and thermal emission spectroscopy for a given planet, that will allow the top atmospheric characterization targets to be readily identified among the TESS planet candidates. Targets that meet our proposed threshold values for these metrics would be encouraged for rapid follow-up and confirmation via radial velocity mass measurements. Based on the catalog of simulated TESS detections by Sullivan et al., we determine appropriate cutoff values of the metrics, such that the TESS mission will ultimately yield a sample of ∼300 high-quality atmospheric characterization targets across a range of planet size bins, extending down to Earth-size, potentially habitable worlds.