Up to date planet ephemerides are becoming increasingly important as exoplanet science moves from detecting exoplanets to characterising their architectures and atmospheres in depth. In this work ephemerides are updated for 22 Kepler planets and 4 Kepler planet candidates, constituting all Kepler planets and candidates with sufficient signal to noise in the TESS 2min dataset. A purely photometric method is utilised here to allow ephemeris updates for planets even when they do not posses significant radial velocity data. The obtained ephemerides are of very high precision and at least seven years 'fresher' than archival ephemerides. In particular, significantly reduced period uncertainties for Kepler-411d, Kepler-538b and the candidates K00075.01/K00076.01 are reported. O-C diagrams were generated for all objects, with the most interesting ones discussed here. Updated TTV fits of five known multiplanet systems with significant TTVs were also attempted (Kepler-18, Kepler-25, Kepler-51, Kepler-89, and Kepler-396), however these suffered from the comparative scarcity and dimness of these systems in TESS. Despite these difficulties, TESS has once again shown itself to be an incredibly powerful follow-up instrument as well as a planet-finder in its own right. Extension of the methods used in this paper to the 30min-cadence TESS data and TESS extended mission has the potential to yield updated ephemerides of hundreds more systems in the future.
V1298 Tau with TESS: Updated Ephemerides, Radii, and Period Constraints from a Second Transit of V1298 Tau e
金牛座V1298是一颗年轻的K型恒星,拥有四颗大小介于0.5 - 0.9 $R_J$之间的凌日系外行星。考虑到该系统的年轻,它提供了一个独特的机会来了解行星半径在同一恒星环境中不同距离的演变。V1298 Tau最初于6年前在K2 Campaign 4期间被观测到。现在,V1298 Tau在美国宇航局的凌日系外行星调查卫星(TESS)的延长任务中被重新观察到。在这里,我们从10分钟的TESS全帧图像中对V1298 Tau进行了新的光度观测。我们使用TESS数据更新V1298 Tau bcd的星历表,并将新观察到的半径与从K2光变曲线测量的半径进行比较,在$1-2σ$水平上,在更红的TESS带通中发现V1298 Tau bcd的较浅的凌日。我们怀疑半径上的差异是由于星点交叉事件或来自附近与V1298 Tau相同像素的暗淡恒星的污染。此外,我们赶上了第二次过境V1298头e,并提出了一种新的方法来推导一个行星的周期从两个过境观察年的边缘后验概率。我们发现V1298 Tau e的最高概率周期与V1298 Tau b处于近2:1的平均运动共振,如果得到证实,可能使V1298 Tau bcde成为4行星共振链。V1298 Tau是几个正在进行和未来观测的目标。这些更新的星历表对于安排未来的过境观测和解释未来的多普勒层析成像或透射光谱信号至关重要。
Revisiting TOI-4438 and TOI-442 planetary systems with new observations from SPIRou and TESS
Instituto de Ciencias Físicas (ICIFI-CONICET), ECyT-UNSAM(物理科学研究所(ICIFI-CONICET),萨米森理工学院);Instituto Tecnológico de Buenos Aires (ITBA)(布宜诺斯艾利斯理工大学);Institut d’astrophysique de Paris, CNRS, UMR 7095, Sorbonne Université(巴黎天体物理学研究所,法国国家科学研究中心,索邦大学);Observatoire de Haute-Provence(上普罗旺斯天文台);Laboratório Nacional de Astrofisica(国家天体物理学实验室);SOAR Telescope/NSF’s NOIRLab(南方自动望远镜/美国国家光学红外天文研究实验室);Institute for Particle Physics and Astrophysics, ETH Zurich(苏黎世联邦理工学院粒子物理与天体物理研究所);Canada France Hawaii Telescope (CFHT) Corporation(加拿大-法国-夏威夷望远镜公司);Trottier Institute for Research on Exoplanets and Department of Physics, Université de Montréal(蒙特利尔大学系外行星研究特罗蒂耶研究所和物理系);Aix Marseille Univ, CNRS, CNES, LAM(艾克斯-马赛大学,法国国家科学研究中心,法国国家太空研究中心);Univ. Grenoble Alpes, CNRS, IPAG(格勒诺布尔阿尔卑斯大学,法国国家科学研究中心);Université de Toulouse, CNRS, IRAP(图卢兹大学,法国国家科学研究中心);Department of Physics, McGill University(麦吉尔大学物理系)
Ephemeris Refinement for Qatar-4 b, HAT-P-18 b, and CoRoT-1 b with Small Telescope and TESS Observations
Arizona State University(亚利桑那州立大学);NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory (Code 667)(NASA戈达德太空飞行中心系外行星与恒星天体物理学实验室)
RV and TTV Measurements of Two Transiting Long-Period Giants around TOI-4600
Tsinghua University(清华大学);Nanjing University(南京大学);The University of New Mexico(新墨西哥大学);University of Chicago(芝加哥大学);University of Arizona(亚利桑那大学);Peking University(北京大学);Westlake University(西湖大学)
The TESS Ten Thousand Catalog: 10,001 uniformly-vetted and -validated Eclipsing Binary Stars detected in Full-Frame Image data by machine learning and analyzed by citizen scientists
NASA Goddard Space Flight Center(美国国家航空航天局戈达德空间飞行中心);SETI Institute(搜寻地外文明计划研究所);Department of Astronomy, University of Virginia(弗吉尼亚大学天文系);Department of Astronomy, San Diego State University(圣地亚哥州立大学天文系);Department of Physics, Kavli Institute for Astrophysics and Space Research, M.I.T.(麻省理工学院物理系、Kavli天体物理与空间研究所);Department of Computer Science, Princeton University(普林斯顿大学计算机科学系);Institute of Plant Physiology and Genetics, Bulgaria(保加利亚植物生理与遗传学研究所)
Revisiting the Exo-Mercury Candidate GJ 367 b with ESPRESSO and a Self-Consistent Tidal Distortion Model
Institute for Astronomy, University of Hawai‘i(夏威夷大学天体物理研究所);Department of Astronomy, California Institute of Technology(加州理工学院天文学系);Department of Astronomy, University of Chicago(芝加哥大学天文学系);Department of Physics & Astronomy, The University of California, Irvine(加州大学尔湾分校物理与天文学系);Dipartimento di Fisica, Università degli Studi di Torino(都灵大学物理系);Institut für Astrophysik und Geophysik, Georg-August-Universität Göttingen(哥廷根大学天文与地球物理研究所);Anton Pannekoek Institute for Astronomy, University of Amsterdam(阿姆斯特丹大学安东·范佩内克天体物理研究所);Department of Astronomy, University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校天文学系);Center for Astrophysical Surveys, National Center for Supercomputing Applications(国家超级计算应用中心天体物理调查中心);Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University(奥胡斯大学物理与天文学系恒星天体物理中心)
Demonstrating Exoplanet Transit Photometry from Space with a 15-mm Aperture Optical Navigation Camera on Hayabusa2
Observatoire de Paris(巴黎天文台);CNRS(法国国家科学研究中心);Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(日本宇宙航空研究开发机构太空科学研究所);Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology(产业技术综合研究所人工智能研究中心);Planetary Exploration Research Center (PERC), Chiba Institute of Technology(千叶工业大学行星探索研究中心);The University of Tokyo(东京大学);Institute of Science Tokyo(东京科学大学);Instituto de Astrofísica de Canarias (IAC)(加那利天体物理研究所);University of La Laguna(拉古纳大学);Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology(产业技术综合研究所日本地质调查所);Rikkyo University(立教大学)
Alleviating the Transit Timing Variations bias in transit surveys. II. RIVERS: Twin resonant Earth-sized planets around Kepler-1972 recovered from Kepler's false positive
Université de Genève(日内瓦大学);Monash University(莫纳什大学);Disaitek;Universität Bern(伯尔尼大学)
Refined parameters, formation, and dynamical stability of the wild exoplanet system K2-312=HD 80653
INAF - Osservatorio Astrofisico di Torino(意大利国家天体物理研究所都灵天文台);INAF - Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);Fundación Galileo Galilei-INAF(伽利略-意大利国家天体物理研究所基金会);Centre for Planetary Sciences, The University of Edinburgh(爱丁堡大学行星科学中心);SUPA, Institute for Astronomy, University of Edinburgh, The Royal Observatory(爱丁堡大学天文学研究所超级物理联盟皇家天文台);Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova(帕多瓦大学伽利莱物理学与天文学系);Space sciences, technologies and astrophysics research Institute, Université de Liège(列日大学空间科学与技术及天体物理研究所);Astrobiology Research Unit, Université de Liège(列日大学天体生物学研究组);Center for Astrophysics | Harvard & Smithsonian(哈佛史密森尼天体物理中心);Department of Physics, Engineering and Astronomy, Stephen F. Austin State University(斯蒂芬·F·奥斯汀州立大学物理、工程与天文学系);Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo(意大利国家天体物理研究所巴勒莫天文台)