The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 day Orbit with the Automated Planet Finder Telescope
Paul A. Dalba, Stephen R. Kane, Diana Dragomir, Steven Villanueva, Karen A. Collins, Thomas Lee Jacobs, Daryll M. Lacourse, Robert Gagliano, Martti H. Kristians… 展开作者
Paul A. Dalba, Stephen R. Kane, Diana Dragomir, Steven Villanueva, Karen A. Collins, Thomas Lee Jacobs, Daryll M. Lacourse, Robert Gagliano, Martti H. Kristiansen, Mark Omohundro, Hans M. Schwengeler, Ivan A. Terentev, Andrew Vanderburg, Benjamin Fulton, Howard Isaacson, Judah Van Zandt, Andrew W. Howard, Daniel P. Thorngren, Steve B. Howell, Natalie M. Batalha, Ashley Chontos, Ian J. M. Crossfield, Courtney D. Dressing, Daniel Huber, Erik A. Petigura, Paul Robertson, Arpita Roy, Lauren M. Weiss, Aida Behmard, Corey Beard, Casey L. Brinkman, Steven Giacalone, Michelle L. Hill, Jack Lubin, Andrew W. Mayo, Teo Močnik, Joseph M. Akana Murphy, Alex S. Polanski, Malena Rice, Lee J. Rosenthal, Ryan A. Rubenzahl, Nicholas Scarsdale, Emma V. Turtelboom, Dakotah Tyler, Paul Benni, Pat Boyce, Thomas M. Esposito, E. Girardin, Didier Laloum, Pablo Lewin, Christopher R. Mann, Franck Marchis, Richard P. Schwarz, Gregor Srdoc, Jana Steuer, Thirupathi Sivarani, Athira Unni, Nora L. Eisner, Tara Fetherolf, Zhexing Li, Xinyu Yao, Joshua Pepper, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins, Christopher J. Burke, Jason D. Eastman, Michael B. Lund, David R. Rodriguez, Pamela Rowden, Eric B. Ting, Jesus Noel Villaseñor
We report the discovery of TOI-2180 b, a 2.8 $M_{\rm J}$ giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24 hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180 b to be 260.8$\pm$0.6 days, revealed an orbital eccentricity of 0.368$\pm$0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180 b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180 b. When considered alongside other giant planets with orbital periods over 100 days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180 b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method.
Retired A Stars and Their Companions VIII: 15 New Planetary Signals Around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts
我们在亚巨星周围发现了7颗新行星和8颗候选行星，作为对已知的“退休A星”周围行星样本的补充（Johnson et al. 2006）。其中可能是第一个围绕次巨星的三行星系统，HD 163607和HD 4917。此外，我们还计算了所有已知行星围绕亚巨星（3 < log g < 4）恒星的可能过境时间、持续时间、深度和概率，重点是TESS任务期间可能的过境。虽然大多数行星的过境概率为1- 2%，但我们发现有3颗行星的过境概率> 9%。
The Habitable-zone Planet Finder Detects a Terrestrial-mass Planet Candidate Closely Orbiting Gliese 1151: The Likely Source of Coherent Low-frequency Radio Emission from an Inactive Star
由LOFAR探测到的来自Gliese 1151（一颗静止的M4.5矮星）的相干低频无线电发射，其无线电发射特性与理论预期的地球大小的行星在1-5天轨道上的恒星-行星相互作用一致。来自麦克唐纳天文台10米霍比-埃伯利望远镜上的宜居带行星X（HPF）光谱仪的新的近红外径向速度，与HARPS-N以前的速度相结合，揭示了一个周期性的多普勒特征，与一颗轨道为2.02天的$m\sin i = 2.5 \pm 0.5 M_\oplus$系外行星一致。凌日系外行星勘测卫星（TESS）的精确测光显示没有耀斑或活动特征，与静止的M矮星一致。虽然在TESS数据中没有检测到行星凌日，但在$\sim2$日周期的测光中可以检测到弱的光度调制。这种用多普勒径向速度技术对候选行星信号的独立探测进一步增加了在无线电波长上首次探测到恒星-系外行星相互作用的权利，并有助于验证这种用于探测系外行星的新兴技术。
RV$\times$TESS I: Modeling Asteroseismic Signals with Simultaneous Photometry and RVs
Tsinghua University（清华大学）；University of Hawai‘i（夏威夷大学）；University of Sydney（悉尼大学）；Shanghai Jiao Tong University（上海交通大学）；Australian National University（澳大利亚国立大学）；King’s College London（伦敦国王学院）；California Institute of Technology（加州理工学院）；Carnegie Institution for Science（卡内基科学研究所）；University of Southern Queensland（南昆士兰大学）
TOI-2147 b and TOI-6019 b: Two eccentric warm Jupiters detected and characterized with TESS and MaHPS
Ludwig-Maximilians-Universität München（慕尼黑大学）；Max-Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；European Southern Observatory (ESO)（欧洲南方天文台）；Lund University（隆德大学）
TOI-6692b: An eccentric 130 day period giant planet with a single transit from TESS
Center for Astrophysics | Harvard & Smithsonian（天体物理中心 | 哈佛-史密森尼）；University of Southern Queensland, Centre for Astrophysics（昆士兰大学南方分校，天体物理中心）；Department of Astronomy and Astrophysics, University of California, Santa Cruz（加州大学圣克鲁兹分校天文与天体物理学系）；Amateur Astronomer（业余天文学家）；Brorfelde Observatory（布罗费尔德天文台）；Citizen scientist, c/o Zooniverse, Department of Physics, University of Oxford（公民科学家，通过Zooniverse，牛津大学物理系）
An Earth-Sized Planet in a 5.4h Orbit Around a Nearby K dwarf
University of Amsterdam（阿姆斯特丹大学）；Pontificia Universidad Católica de Chile（智利天主教 Pontificia 大学）；Millennium Institute for Astrophysics（天体物理千年研究所）；Jet Propulsion Laboratory（喷气推进实验室）
Searching for GEMS: TOI-5916 b & TOI-6158 b are two Saturn-density planets orbiting M2 dwarfs
University of California, Irvine（加州大学尔湾分校）；Carnegie Institution for Science（卡内基科学研究所）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；U.S. National Science Foundation, National Optical-Infrared Astronomy Research Laboratory（美国国家科学基金会，国家光学-红外天文研究实验室）；University of Wyoming（怀俄明大学）；Las Campanas Observatory, Carnegie Observatories（拉斯坎帕纳斯天文台，卡内基观测站）
Spin-Orbit Alignment of Two Neptune-size Planets Younger than 500 Myr: TOI-560 b and TOI-5082 b
Institute for Astronomy, University of Hawaii（夏威夷大学天文研究所）；Department of Astronomy, California Institute of Technology（加州理工学院天文学系）；Jet Propulsion Laboratory, California Institute of Technology（加州理工学院喷气推进实验室）；Department of Astronomy, University of California Berkeley（加州大学伯克利分校天文学系）；Center for Computational Astrophysics, Flatiron Institute（西蒙斯基金会平顿研究所计算天体物理中心）；Korea Astronomy and Space Science Institute（韩国天文与空间科学研究院）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Department of Astronomy, Indiana University（印第安纳大学天文学系）
Searching for GEMS: Three warm Saturns and a super-Jupiter orbiting four early M-dwarfs
University of California, Irvine（加州大学尔湾分校）；Carnegie Institution for Science（卡内基科学机构）；Southeastern Universities Research Association（东南大学研究协会）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）
