The rotation-activity relation of M dwarfs: From K2 to TESS and PLATO
St. Raetz, B. Stelzer, A. Scholz
备注:
Accepted for publication in Astronomical Notes (AN). 28 pages 11 figures, 4 tables. The tables are available in ascii format at http://straetz.stiller-berg.de/7.html
Studies of the rotation-activity relation of late-type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation-activity relation with K2 for M dwarfs where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. For a sample of 430 M dwarfs observed in campaigns C0-C19 in long cadence mode we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation-activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ~10d. Our more than three times larger sample increases the statistical significance of this finding.
Luminaries in the Sky: The TESS LEGACY sample of bright stars. II. In-depth seismic characterisation of 32 naked-eye stars in the PLATO LOP fields
Université Paris Cité, Université Paris-Saclay, CEA, CNRS, AIM(巴黎西岱大学、巴黎萨克雷大学、法国原子能和替代能源委员会、法国国家科学研究中心);School of Physics and Astronomy, University of Birmingham(伯明翰大学物理与天文学学院);INAF – Osservatorio Astrofisico di Catania(意大利国家天体物理研究所卡塔尼亚天文台);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);IMT Atlantique(大西洋高等理工学院);Institut Villebon - Georges Charpak , Université Paris-Saclay(巴黎萨克雷大学维尔邦-乔治·夏帕克研究所)
Observing bright pulsating white dwarfs with PLATO: A new window into the late stages of stellar evolution
KU Leuven(荷语鲁汶大学);Universidad Nacional de La Plata(拉普拉塔国立大学);CONICET-UNLP(阿根廷国家科学研究委员会-拉普拉塔国立大学联合中心);Isaac Newton Group of Telescopes(艾萨克·牛顿望远镜组);University of Oklahoma(俄克拉荷马大学);Université de Montréal(蒙特利尔大学);Boston University(波士顿大学);University of Warwick(华威大学);CUNY Queens College(纽约市立大学皇后学院)
Bolometric corrections of stellar oscillation mode amplitudes as observed by the PLATO mission. I. Planck-spectrum estimates
Aarhus University(奥胡斯大学);Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, CNES(天体物理学与行星学研究所以、图卢兹大学、法国国家科学研究中心、法国国家空间研究中心);University of Birmingham(伯明翰大学)
Magnetic geometry of M dwarfs in the southern PLATO field
Université de Montpellier(蒙彼利埃大学);CNRS(法国国家科学研究中心);Leiden University(莱顿大学);Institut de Recherche en Astrophysique et Planétologie(天体物理学与行星学研究所在);Université de Toulouse(图卢兹大学);Univ. Grenoble Alpes(格勒诺布尔阿尔卑斯大学);IPAG(天文与行星学研究所);University of Tartu(塔尔图大学);Tartu Observatory(塔尔图天文台);European Space Research and Technology Centre (ESA/ESTEC)(欧洲空间研究与技术中心);INAF-Catania Astrophysical Observatory(意大利国家天体物理学院卡塔尼亚天文台)
Variability classification of TESS targets in LOPS2, the first long-term pointing field of PLATO. Version 1 of the public variability catalogue
KU Leuven(荷语鲁汶大学);MIT Kavli Institute for Astrophysics & Space Research, Massachusetts Institute of Technology(麻省理工学院卡弗里天体物理与空间研究所);Astronomical Institute of the Czech Academy of Sciences(捷克科学院天文研究所);Newcastle University(纽卡斯尔大学);University of Southern Queensland(南昆士兰大学)
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS -- IV. Discovery of two new GW Vir stars: TIC0403800675 and TIC1989122424
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
Pulsating H-deficient WDs and pre-WDs observed with TESS: V. Discovery of two new DBV pulsators, WD J152738.4-450207.4 and WD 1708-871, and asteroseismology of the already known DBV stars PG 1351+489, EC 20058-5234, and EC 04207-4748
Unveiling the properties of pulsating low-mass helium-core white dwarfs through TESS asteroseismology I. First results
Universidad Nacional de La Plata(拉普拉塔国立大学);CONICET-UNLP(阿根廷国家科学研究委员会-拉普拉塔国立大学);City University of New York Graduate Center(纽约市立大学研究生院);KU Leuven(荷语鲁汶大学);Queens College, City University of New York(纽约市立大学皇后学院);Universitat Politècnica de Catalunya(加泰罗尼亚理工大学);Boston University(波士顿大学)
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)
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS: I. Asteroseismology of the GW Vir stars RX J2117+3412, HS 2324+3944, NGC 6905, NGC 1501, NGC 2371, and K 1-16
A very rapidly rotating white dwarf in nova YZ Reticuli
Universidad Nacional de Hurlingham (UNAHUR)(乌尔哈林国立大学);Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)(国家科学研究委员会);South African Astronomical Observatory(南非天文台);International Gemini Observatory/NSF NOIRLab(国际双子座天文台/美国国家光学红外天文实验室);INAF-Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);Department of Astronomy, University of Wisconsin(威斯康星大学天文学系);Centre for Extragalactic Astronomy, Department of Physics, Durham University(达勒姆大学物理学系河外天文中心);INAF – Osservatorio Astronomico di Capodimonte(意大利国家天体物理研究所卡波迪蒙特天文台);Advanced Technologies Research Institute, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava(布拉迪斯拉发斯洛伐克技术大学特尔纳瓦材料科学与技术学院先进技术研究所)
A Previously Underexplored Regime in TESS: Minute-Scale Eclipses Reveal Ten White Dwarf-Cool M-Dwarf Binaries
Massachusetts Institute of Technology(麻省理工学院);Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO)(法国高等航空航天学院);University of Birmingham(伯明翰大学);Université de Liège(列日大学);Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology(麻省理工学院卡弗里天体物理与空间研究研究所);University of Florida(佛罗里达大学);Instituto de Astrofísica de Canarias (IAC)(加那利天体物理学研究所)
Time-resolved spectroscopy and photometry of an M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in H$α$ line during the non-white light flare
在本文中,我们提出的光谱和光度观测的M-型耀斑星YZ CMi的框架内的光学和红外协同望远镜的教育和研究(OISTER)的合作在过境系外行星调查卫星(TESS)的观测期间的结果。我们从TESS光变曲线中检测到145个白光耀斑,并从2019-01-16和2019-01-18之间进行的OISTER观测中检测到4个H $α$耀斑。其中,3 H $α$耀斑与白光耀斑有关。然而,其中一个没有表现出明显的连续增亮,在这次耀斑期间,H $α$线表现出蓝不对称,持续了$\sim 60$ min。蓝移分量的视线速度为$-80$ - $-100$ km s $^{-1}$。这表明,即使没有可检测到的红色/近红外连续增亮,色球层冷等离子体也可以向上流动。假设H $α$线的蓝色不对称是由YZ CMi上的日珥爆发引起的,我们估计了向上运动的物质的质量和动能分别为$10^{16}$ - $10^{18}$ g和$10^{29.5}$ - $10^{31.5}$ erg。估计的质量是可比的预期从耀斑X射线能量和质量的恒星耀斑和太阳日冕物质抛射的向上移动的材料之间的经验关系。相比之下,YZ CMi上的非白光耀斑的估计动能大致是$2$数量级小于耀斑X射线能量和太阳CME动能之间的关系所预期的。这可以通过日冕物质抛射和日珥爆发之间速度的差异来理解。