Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample
May G. Pedersen, Sowgata Chowdhury, Cole Johnston, Dominic Bowman, Conny Aerts, Gerald Handler, Peter De Cat, Coralie Neiner, Alexandre David-Uraz, Derek Buzasi… 展开作者
May G. Pedersen, Sowgata Chowdhury, Cole Johnston, Dominic Bowman, Conny Aerts, Gerald Handler, Peter De Cat, Coralie Neiner, Alexandre David-Uraz, Derek Buzasi, Andrew Tkachenko, Sergio Simon-Diaz, Ehsan Moravveji, James Sikora, Giovanni M. Mirouh, Catherine C. Lovekin, Matteo Cantiello, Jadwiga Daszynska-Daszkiewicz, Andrzej Pigulski, Roland K. Vanderspek, George R. Ricker
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16 pages, 4 figures, 1 Table, Accepted for publication in ApJL
Uncertainties in stellar structure and evolution theory are largest for stars undergoing core convection on the main sequence. A powerful way to calibrate the free parameters used in the theory of stellar interiors is asteroseismology, which provides direct measurements of angular momentum and element transport. We report the detection and classification of new variable O and B stars using high-precision short-cadence (2-min) photometric observations assembled by the Transiting Exoplanet Survey Satellite (TESS). In our sample of 154 O and B stars, we detect a high percentage (90%) of variability. Among these we find 23 multiperiodic pulsators, 6 eclipsing binaries, 21 rotational variables, and 25 stars with stochastic low-frequency variability. Several additional variables overlap between these categories. Our study of O and B stars not only demonstrates the high data quality achieved by TESS for optimal studies of the variability of the most massive stars in the Universe, but also represents the first step towards the selection and composition of a large sample of O and B pulsators with high potential for joint asteroseismic and spectroscopic modeling of their interior structure with unprecedented precision.
Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed $δ$ Scuti stars
Xinjiang Astronomical Observatory, Chinese Academy of Sciences（中国科学院新疆天文台）；School of Astronomy and Space Science, University of Chinese Academy of Sciences（中国科学院大学天文学与空间科学学院）；Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick（华威大学物理学院聚变、太空与天体物理学中心）；Institute of Geophysics, University of Tehran（德黑兰大学地球物理学研究所）；Department of Physics, Faculty of Science, University of Qom（库姆大学理学院物理系）；Instituto de Astrofísica de Andalucía - CSIC（安达卢西亚天体物理研究所-西班牙国家科研委员会）；Departamento de Física Teórica y del Cosmos, Universidad de Granada（格拉纳达大学理论与宇宙物理学系）；Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences（乌兹别克斯坦科学院乌鲁格别克天文研究所）
Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS I. Asteroseismic distances to 12,500 red-giant stars
Calibration of the [C/N] and [Y/Mg] chemical clocks with asteroseismic ages from the TESS space mission
Institute of Theoretical Physics and Astronomy, Vilnius University（维尔纽斯大学理论与天体物理研究所）；Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University（奥胡斯大学物理学与天文学系恒星天体物理学中心）
Pushing the Limit of Asteroseismic Detection for Cool Dwarfs using TESS and Deep Learning
University of Rochester（罗切斯特大学）；California Institute of Technology（加州理工学院）；University of Chicago（芝加哥大学）；Center for Astrophysics — Harvard & Smithsonian（哈佛与史密森尼天体物理中心）；Harvard University（哈佛大学）；Anton Pannekoek Institute, University of Amsterdam（阿姆斯特丹大学安东·潘内克研究所）；SRON（荷兰空间天文研究所）；Université de Moncton（蒙克顿大学）
Luminaries in the Sky: The TESS Legacy Sample of Bright Stars. I. Asteroseismic detections in naked-eye main-sequence and sub-giant solar-like oscillators
Fast-Cadence TESS Photometry and Doppler Tomography of the Asynchronous Polar CD Ind: A Revised Accretion Geometry from Newly Proposed Spin and Orbital Periods
Large-scale variability in macroturbulence driven by pulsations in the rapidly rotating massive star Zeta Oph from high-cadence ESPRESSO spectroscopy and TESS photometry
Rapidly oscillating Ap stars observed with TESS. The LAMOST Ap sample and 49 Cam
Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto（波尔图大学空间与天体物理研究所）；Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto（波尔图大学理学院物理与天文学系）；South African Astronomical Observatory（南非天文台）；School of Physics, Engineering and Technology, University of York（约克大学物理、工程与技术学院）；DTU Space, Technical University of Denmark（丹麦技术大学空间中心）；Centre for Space Research, North-West University（西北大学太空研究中心）；Jeremiah Horrocks Institute, University of Lancashire（兰开夏大学杰里米亚·霍罗克斯研究所）；Department of Astronomy, Cornell University（康奈尔大学天文学系）；Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM（巴黎萨克雷大学、巴黎西岱大学、法国原子能与替代能源委员会、法国国家科学研究中心、天体物理学与信息分子研究所）
Global asteroseismology of 19,000 red giants in the TESS Continuous Viewing Zones
University of Sydney（悉尼大学）；University of Hawai‘i（夏威夷大学）；University of New South Wales（新南威尔士大学）；Massachusetts Institute of Technology（麻省理工学院）；National University of Singapore（新加坡国立大学）；Australian National University（澳大利亚国立大学）
Scalable, Advanced Machine Learning-based Approaches for Stellar Flare Identification: Application to TESS short-cadence Data and Analysis of a New Flare Catalogue
Asteroseismology and interferometry of the F7V spectroscopic binary $χ$ Draconis A in the TESS CVZ
Aarhus University（奥胡斯大学）；University of Sydney（悉尼大学）；Macquarie University（麦考瑞大学）；Institute of Space Sciences (ICE, CSIC)（空间科学研究所（ICE，CSIC））；Institut d’Estudis Espacials de Catalunya (IEEC)（加泰罗尼亚空间研究学院）
Asteroseismic ages for 17,000 stars in Kepler, K2 and TESS
University of Birmingham（伯明翰大学）；Università degli Studi di Bologna（博洛尼亚大学）；INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna（意大利国家天体物理研究所博洛尼亚天文与空间科学观测站）；École Polytechnique Fédérale de Lausanne (EPFL)（洛桑联邦理工学院）；Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Cité, CY Cergy Paris Université（巴黎天文台、巴黎文理研究大学、法国国家科学研究中心、索邦大学、巴黎西岱大学、塞吉-蓬图瓦兹大学）；Stellar Astrophysics Centre, Department of Physics & Astronomy, Aarhus University（奥胡斯大学天体物理学中心）
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS VI. Asteroseismology of the GW Vir-type central star of the Planetary Nebula NGC 246
