TIC-320687387 B: a long-period eclipsing M-dwarf close to the hydrogen burning limit
Samuel Gill, Solene Ulmer-Moll, Peter J. Wheatley, Daniel Bayliss, Matthew R. Burleigh, Jack S. Acton, Sarah L. Casewell, Christopher A. Watson, Monika Lendl, H… 展开作者
Samuel Gill, Solene Ulmer-Moll, Peter J. Wheatley, Daniel Bayliss, Matthew R. Burleigh, Jack S. Acton, Sarah L. Casewell, Christopher A. Watson, Monika Lendl, Hannah L. Worters, Ramotholo R. Sefako, David R. Anderson, Douglas R. Alves, François Bouchy, Edward M. Bryant, Philipp Eigmüller, Edward Gillen, Michael R. Goad, Nolan Grieves, Maximilian N. Günther, Beth A. Henderson, James S. Jenkins, Lokesh Mishra, Maximiliano Moyano, Hugh P. Osborn, Rosanna H. Tilbrook, Stéphane Udry, Jose I. Vines, Richard G. West
We are using precise radial velocities from CORALIE together with precision photometry from the Next Generation Transit Survey (NGTS) to follow up stars with single-transit events detected with the Transiting Exoplanet Survey Satellite (TESS). As part of this survey we identified a single transit on the star TIC-320687387, a bright (T=11.6) G-dwarf observed by TESS in Sector 13 and 27. From subsequent monitoring of TIC-320687387 with CORALIE, NGTS, and Lesedi we determined that the companion, TIC-320687387 B,is a very low-mass star with a mass of $96.2 \pm _{2.0}^{1.9} M_J$ and radius of $1.14 \pm _{0.02}^{0.02} R_J$ placing it close to the hydrogen burning limit ($\sim 80 M_J$). TIC-320687387 B has a wide and eccentric orbit, with a period of 29.77381 days and an eccentricity of $0.366 \pm 0.003$. Eclipsing systems such as TIC-320687387 AB allow us to test stellar evolution models for low-mass stars, which in turn are needed to calculate accurate masses and radii for exoplanets orbiting single low-mass stars. The wide orbit of TIC-320687387 B makes it particularly valuable as its evolution can be assumed to be free from perturbations caused by tidal interactions with its G-type host star.
TIC 322208686: An Eclipsing System with $γ$ Doradus Pulsations and a Third Component on a Wider Orbit
Korea Astronomy and Space Science Institute（韩国天文与空间科学研究院）；National Astronomical Research Institute of Thailand（泰国国家天文研究所）；Department of Astronomy and Space Science, Chungbuk National University（忠北国立大学天文宇宙科学系）
TIC 295741342: A Triply-Eclipsing Triple Star System with a Giant Tertiary
NASA Goddard Space Flight Center（NASA戈达德太空飞行中心）；SETI Institute（地外文明研究所）；Department of Physics, Kavli Institute for Astrophysics and Space Research, M.I.T.（麻省理工学院物理系、卡弗里天体物理学与空间研究研究所）；Baja Astronomical Observatory of University of Szeged（塞格德大学巴亚天文台）；HUN-REN – SZTE Stellar Astrophysics Research Group（匈牙利研究与教育网络-塞格德大学恒星天体物理学研究组）；Konkoly Observatory, Research Centre for Astronomy and Earth Sciences（孔科利天文台，地球科学研究中心）
TIC 433545934: The first 2+2 type doubly eclipsing binary with extra, mutual eclipses
HUN–REN–SZTE Stellar Astrophysics Research Group（匈牙利科学院-罗兰大学恒星天体物理学研究组）；Baja Astronomical Observatory of University of Szeged（塞格德大学巴亚天文台）；Konkoly Observatory, Research Centre for Astronomy and Earth Sciences（孔科利天文台，地球与天文学研究中心）；Department of Physics, Kavli Institute for Astrophysics and Space Research, M.I.T.（麻省理工学院物理系，卡弗里天体物理学与空间研究研究所）；Astronomical Institute, Faculty of Mathematics and Physics, Charles University（查理大学数学与物理学院天文研究所）；FZU - Institute of Physics of the Czech Academy of Sciences（捷克科学院物理研究所（FZU））；Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava（奥帕瓦西里西亚大学物理研究所理论物理与天体物理学研究中心）；Astronomical Institute, Academy of Sciences（科学院天文研究所）；Department of Experimental Physics, University of Szeged（塞格德大学实验物理系）
Diversity in Evolutionary Status and Magnetic Activity among Solar-Type Twin Detached Eclipsing Binaries
Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；University of Chinese Academy of Sciences（中国科学院大学）；Department of Astronomy, School of Physics and Astronomy, Yunnan University（云南大学物理与天文学院天文学系）；National Astronomical Research Institute of Thailand（泰国国家天文研究所）；Department of Astronomy and Space Sciences, Atatürk University, Faculty of Science（阿塔图尔克大学理学院天文学与空间科学系）；Türkiye National Observatories, DAG（土耳其国家天文台）
Searching for GEMS: Discovery of the Nearby Post-Common-Envelope Binary System TIC-460388167
University of Wyoming（怀俄明大学）；NASA Goddard Space Flight Center（美国国家航空航天局戈达德太空飞行中心）；Carnegie Institution for Science（卡内基科学机构）；The University of Arizona（亚利桑那大学）；The University of Texas at Austin（得克萨斯大学奥斯汀分校）；The Pennsylvania State University（宾夕法尼亚州立大学）
Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
我们报告了一个大规模的，紧凑的，分层的三重系统（TIC 470710327）的发现和分析，最初由公民科学家在美国宇航局的凌日系外行星调查卫星（TESS）获得的数据中确定。用HERMES摄谱仪获得的光谱跟踪观测，结合日食定时变化（ETVs），证实该系统由三颗OB星组成，其中一颗是紧凑的1.10 d食双星，另一颗是在52.04 d轨道上的非食三级星。该系统的动力学模型（来自径向速度和ETVs）揭示了一种罕见的配置，其中第三恒星（O9.5-B0.5V; 14-17 M $_{\odot}$）的质量比内部双星（10.9-13.2 M $_{\odot}$）的质量更大。考虑到第三纪的高质量，我们预测这个系统在未来将经历多个阶段的质量转移，并可能最终成为双中子星引力波的祖先或一个异国情调的索恩-Zytkow对象。进一步的观测特性，这个系统的承诺约束的大质量恒星的形成方案，以及他们的异国情调的进化的最终产品。
Ten new, ultracompact triply eclipsing triple star systems
HUN--REN--SZTE Stellar Astrophysics Research Group（匈牙利科学院-塞格德大学恒星天体物理学研究组）；Baja Astronomical Observatory of University of Szeged（塞格德大学巴亚天文台）；Konkoly Observatory, Research Centre for Astronomy and Earth Sciences（科科尼天文台，地球与天文学研究中心）；Department of Physics, Kavli Institute for Astrophysics and Space Research, M.I.T.（麻省理工学院卡弗里天体物理学与空间研究系物理系）；Department of Experimental Physics, University of Szeged（塞格德大学实验物理系）；NASA Goddard Space Flight Center（美国国家航空航天局戈达德太空飞行中心）；SETI Institute（搜寻地外文明研究所）；University of Oxford（牛津大学）；Brorfelde Observatory（布罗费尔德天文台）；National Space Institute, Technical University of Denmark（丹麦技术国立航天研究所）；Astronomical Institute, Slovak Academy of Sciences（斯洛伐克科学院天文研究所）；ELTE Gothard Astrophysical Observatory（厄特沃什·洛兰德大学戈塔德天体物理天文台）
A Low-mass, Pre-main-sequence Eclipsing Binary in the 40 Myr Columba Association -- Fundamental Stellar Parameters and Modeling the Effect of Star Spots
