The Second APOKASC Catalog: The Empirical Approach
Marc H. Pinsonneault, Yvonne P. Elsworth, Jamie Tayar, Aldo Serenelli, Dennis Stello, Joel Zinn, Savita Mathur, Rafael A. García, Jennifer A. Johnson, Saskia He… 展开作者
Marc H. Pinsonneault, Yvonne P. Elsworth, Jamie Tayar, Aldo Serenelli, Dennis Stello, Joel Zinn, Savita Mathur, Rafael A. García, Jennifer A. Johnson, Saskia Hekker, Daniel Huber, Thomas Kallinger, Szabolcs Mészáros, Benoit Mosser, Keivan Stassun, Léo Girardi, Thaíse S. Rodrigues, Victor Silva Aguirre, Deokkeun An, Sarbani Basu, William J. Chaplin, Enrico Corsaro, Katia Cunha, D. A. García-Hernández, Jon Holtzman, Henrik Jönsson, Matthew Shetrone, Verne V. Smith, Jennifer S. Sobeck, Guy S. Stringfellow, Olga Zamora, Timothy C. Beers, J. G. Fernández-Trincado, Peter M. Frinchaboy, Fred R. Hearty, Christian Nitschelm
We present a catalog of stellar properties for a large sample of 6676 evolved stars with APOGEE spectroscopic parameters and \textit{Kepler} asteroseismic data analyzed using five independent techniques. Our data includes evolutionary state, surface gravity, mean density, mass, radius, age, and the spectroscopic and asteroseismic measurements used to derive them. We employ a new empirical approach for combining asteroseismic measurements from different methods, calibrating the inferred stellar parameters, and estimating uncertainties. With high statistical significance, we find that asteroseismic parameters inferred from the different pipelines have systematic offsets that are not removed by accounting for differences in their solar reference values. We include theoretically motivated corrections to the large frequency spacing ($Δν$) scaling relation, and we calibrate the zero point of the frequency of maximum power ($ν_{\rm max}$) relation to be consistent with masses and radii for members of star clusters. For most targets, the parameters returned by different pipelines are in much better agreement than would be expected from the pipeline-predicted random errors, but 22\% of them had at least one method not return a result and a much larger measurement dispersion. This supports the usage of multiple analysis techniques for asteroseismic stellar population studies. The measured dispersion in mass estimates for fundamental calibrators is consistent with our error model, which yields median random and systematic mass uncertainties for RGB stars of order 4\%. Median random and systematic mass uncertainties are at the 9\% and 8\% level respectively for RC stars.
Spectroscopic identification of rapidly rotating red giant stars in APOKASC-3 and APOGEE DR16
快速旋转的红巨星在天体物理学上很有趣，但很罕见。在本文中，我们提出了一个目录的3217个活跃的红巨星候选人在APOGEE DR 16调查。我们使用一个控制样本中的开普勒领域的充分研究，以证明一个强大的旋转和异常之间的关系，在光谱解决方案相对于典型的巨人。在整个调查中具有类似解决方案的明星被确定为候选人。我们使用vsin \textiti测量来确认50+/- 1.2%的候选者是确定的快速旋转者，而开普勒控制样本为4.9+/-0.2%。在开普勒控制样本和来自DR 16的控制样本中，我们发现有3-4倍于5 < vsini < 10 km s $^{-1}$ compared to vsini >10 km s $^{-1}$的巨星旋转，这是红巨星异常旋转的传统阈值。绝大多数的中间旋光子在光谱上并不是反常的。我们使用来自APOGEE和\textit{Gaia}的二元诊断来推断二元分数为73+/-2.4%。我们确定了一个显着的偏差，在报告的金属丰度的候选人与完整的光谱解决方案，与中位偏移量为0.37德克斯在[M/H]从对照样品。因此，高达10%的[M/H]<-1的恒星并不是真正的贫金属恒星。最后，我们使用盖亚数据来确定一个子人口的主序列光度双星错误地归类为巨人。
A catalogue of asteroseismically calibrated ages for APOGEE DR17. The predictions of a CatBoost machine learning model based on the [Mg/Ce] chemical clock and other stellar parameters
The SLoWPoKES Catalog of Low-mass Ultra-wide Binaries: A Cool Stars Resource for Testing Fundamental Properties and for Constraining Binary Formation Theory
Tales of stellar and binary co-evolution, told by stellar oscillations -- Binary demographics and their impact on stellar mass, orbits, and age estimates in main-sequence and red-giant stars
Instituto de Astrofísica de Canarias（加那利天体物理研究所）；Universidad de La Laguna（拉古纳大学）
A catalog of new blue stragglers in open clusters with Gaia DR3
Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；University of Chinese Academy of Sciences（中国科学院大学）；Universitat de Barcelona（巴塞罗那大学）；Institut d'Estudis Espacials de Catalunya（加泰罗尼亚空间研究所）；Xinjiang Astronomical Observatory, Chinese Academy of Sciences（中国科学院新疆天文台）
Emission line star catalogues post-Gaia DR3: A validation of Gaia DR3 data using LAMOST OBA emission catalogue
盖亚DR 3和进一步的释放有可能识别和分类银河系中的新发射线恒星。利用LAMOST OBA发射星表中的发射线恒星参数，对Gaia DR 3的天体物理参数进行了全面的验证。我们比较不同的天体物理参数提供的盖亚DR 3与LAMOST光谱估计。通过使用更大的发射线恒星样本，我们执行全局多项式和分段线性拟合来更新经验关系，以将Gaia DR 3伪等效宽度转换为观测到的等效宽度，然后从分析中去除弱发射体。我们发现DR 3给出的发射线源分类与LAMOST OBA发射目录的分类是一致的。与gspphot和gspspec相比，Gaia DR 3的esphs模块估计的天体物理参数提供了更好的估计。提供了二次多项式关系以及用于等效宽度转换的分段线性拟合参数。我们注意到，具有弱Hα发射的LAMOST星在BP/RP谱中没有被识别为处于发射状态。这表明盖亚DR 3识别的发射线源是不完整的。此外，盖亚DR 3提供了关于发射线恒星样本的二元和可变性质的宝贵信息。
A Catalog of Homogeneously Derived Stellar Parameters for Spectroscopic Survey Stars
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences（保加利亚科学院天文学研究所和国立天文台）；Weizmann Institute of Science（魏茨曼科学研究所）；Ariel University（阿里埃勒大学）
Asteroseismic modelling of main-sequence solar-like stars and Kepler exoplanet host stars with the FICO procedure I. Catalogue of fundamental stellar properties
Uppsala University（乌普萨拉大学）；Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CY Cergy Paris Université, CNRS（巴黎天文台，巴黎文理研究大学，索邦大学，巴黎西岱大学，CY塞吉-蓬图瓦兹大学，法国国家科学研究中心）；STAR Institute, Université de Liège（列日大学天体物理、恒星和系外行星研究所）；Istituto Nazionale di Astrofisica – Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP（波尔图大学空间科学与天体物理研究所）
Ongoing and Post-Mass-Transfer Binaries: A Living Catalog and Unified Review of Binary Mass Transfer Products
Radboud University Nijmegen（拉德堡德大学）；California Institute of Technology（加州理工学院）；Tel Aviv University（特拉维夫大学）；University of Arizona（亚利桑那大学）；University of Toronto（多伦多大学）
