Scaling relations are very useful tools for estimating unknown stellar quantities. Within this framework, eclipsing binaries are ideal for this goal because their mass and radius are known with a very good level of accuracy, leading to improved constraints on the models. We aim to provide empirical relations for the mass and radius as function of luminosity, metallicity, and age. We investigate, in particular, the impact of metallicity and age on those relations. We used a multi-dimensional fit approach based on the data from DEBCat, an updated catalogue of eclipsing binary observations such as mass, radius, luminosity, effective temperature, gravity, and metallicity. We used the {PARAM web interface for the Bayesian estimation of stellar parameters, along with} the stellar evolutionary code MESA to estimate the binary age, assuming a coeval hypothesis for both members. We derived the mass and radius-luminosity-metallicity-age relations using 56 stars, {with metallicity and mass in the range -0.34<[Fe/H]<0.27 and 0.66<M/M{_\odot}<1.8}. With that, the observed mass and radius are reproduced with an accuracy of 3.5% and 5.9%, respectively, which is consistent with the other results in literature. We conclude that including the age in such relations increases the quality of the fit, particularly in terms of the mass, as compared to the radius. On the other hand, as other authors have noted, we observed an higher dispersion on the mass relation than in that of the radius. We propose that this is due to a stellar age effect.
Revisiting Ca II Activity Indices in FGK Stars: Systematic Biases in Infrared Triplet Measurements
National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);School of Astronomy and Space Science, University of Chinese Academy of Sciences(中国科学院大学天文与空间科学学院);Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);Institute of Astronomy, University of Cambridge(剑桥大学天文研究所)
Revisiting bright delta Scuti stars and their period-luminosity relation with TESS and Gaia DR3
University of Pennsylvania(宾夕法尼亚大学);Sydney Institute for Astronomy, School of Physics, University of Sydney(悉尼大学物理学院天体物理研究所);Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University(奥胡斯大学物理与天文系恒星天体物理中心);Centre for Astrophysics, University of Southern Queensland(昆士兰南部大学天体物理中心);Institute for Astronomy, University of Hawai‘i(夏威夷大学天体物理研究所)
BSN-VI: Multiband Light Curve Modeling of Four W UMa-Type Contact Binaries I. Revisiting Energy Transfer Mechanisms and Luminosity Behavior
BSN Project(BSN项目);Independent researcher(独立研究者);LUX, Observatoire de Paris, CNRS, PSL(巴黎天文台,法国国家科学研究中心,巴黎文理研究大学);Department of Astronomy, Raderon AI Lab(天文学系,拉德伦人工智能实验室);Instituto de Astronomía, UNAM(墨西哥国立自治大学天文学研究所);European Southern Observatory(欧洲南方天文台);Department of Astronomy and Space Science, Faculty of Science, Erciyes University(埃尔吉耶斯大学理学院天文学与空间科学系);Erciyes University, Astronomy and Space Science Observatory Application and Research Center(埃尔吉耶斯大学天文与空间科学观测应用与研究中心);Department of Physics, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University(恰纳卡莱18三月大学文理学院物理系);Astrophysics Research Center and Observatory, Çanakkale Onsekiz Mart University(恰纳卡莱18三月大学天体物理学研究中心和天文台);Variable Stars South (VSS), Congarinni Observatory(南变星组织(VSS),康加里尼天文台)
HADES RV Programme with HARPS-N at TNG. X. The non-saturated regime of the stellar activity-rotation relationship for M-Dwarfs
目的。我们的目标是扩展在主序星FGK中发现的X射线光度(Lx)和自转周期(Prot)之间的关系,并测试它是否也适用于早M矮星,特别是在对应于慢自转星的非饱和区(Lx α P_{rot} ^{-2})。方法.我们使用的光度日冕活动指标(LX)的78个早期M矮星的样本质量范围从0.3至0.75 Msun从HArps-N红矮星系外行星巡天(HADES)径向速度(RV)方案从ROSAT和XMM-牛顿收集。旋转周期(P_{rot})的确定是通过分析Ca ii H & K和Hα活性指标的高分辨率光谱的时间序列来完成的。我们的样本主要包括旋转周期从15到60天的慢旋转制度。结果我们的工作扩展到低质量制度的观察到的趋势,更大质量的恒星表现出一个连续的转变的Lx/Lbol与普罗特幂律对较长的旋转周期值,并包括确定,在一个更准确的方式,旋转周期的值在饱和发生(P_{sat})的M矮星。结论.我们的结论是,FGK恒星的日冕活动和恒星旋转之间的关系也适用于早期M矮星在非饱和制度,表明旋转周期是足够的,以确定比Lx/Lbol。
The AMBRE Project: Line-broadening and stellar rotation of ESO/FEROS archived spectra
Université Côte d’Azur(蔚蓝海岸大学);Observatoire de la Côte d’Azur(蔚蓝海岸天文台);CNRS(法国国家科学研究中心);Laboratoire Lagrange(拉格朗日实验室);Université Jospeh KI-ZERBO(约瑟夫·基泽尔博大学)
Revisiting the near infrared Calcium triplet as metallicity indicator
University of Surrey(萨里大学);INAF-Osservatorio di Astrofisica e Scienza dello Spazio(意大利国家天体物理研究所天文与空间科学观测站);Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所);Universidad de La Laguna(拉帕鲁纳大学);INAF – Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切特里天文台);Space Science Data Center – ASI(ASI空间数据中心);Universita degli Studi di Bologna(博洛尼亚大学)
Plato benchmark stars I. The initial benchmark sample
Royal Observatory of Belgium(比利时皇家天文台);Keele University(基尔大学);Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange(蔚蓝海岸大学,蔚蓝海岸天文台,法国国家科学研究中心,拉格朗日实验室);Uppsala University(乌普萨拉大学);Institut d’Astrophysique Spatiale (IAS), CNRS, Université Paris-Saclay(天体物理研究所,法国国家科学研究中心,巴黎萨克雷大学);Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences(尼古拉·哥白尼天文中心,波兰科学院);Instituto de Astrofísica, Pontificia Universidad Católica de Chile(智利天主教Pontificia大学天体物理研究所);Heidelberg Institute for Theoretical Studies(海德堡理论研究所);INAF – Astronomical Observatory of Abruzzo(意大利国家天体物理研究所 - 阿布鲁佐天文台);INFN, Sezione di Pisa(意大利国家核物理研究所,比萨分部);INAF – Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所 - 阿尔切特里天文台);Instituto de Estudios Astrofísicos, Universidad Diego Portales(迭戈·波特莱斯大学天体研究所以);LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université(空间与天体力学实验室,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)