W Ursa Majoris (W UMa)-type contact binary systems (CBs) are useful statistical distance indicators because of their large numbers. Here, we establish (orbital) period-luminosity relations (PLRs) in 12 optical-to-mid-infrared bands (GBV RIJHKsW1W2W3W4) based on 183 nearby W UMa-type CBs with accurate Tycho-Gaia parallaxes. The 1σ dispersion of the PLRs decreases from optical to near- and mid-infrared wavelengths. The minimum scatter, 0.16 mag, implies that W UMa-type CBs can be used to recover distances to 7% precision. Applying our newly determined PLRs to 19 open clusters containing W UMa-type CBs demonstrates that the PLR and open cluster CB distance scales are mutually consistent to within 1%. Adopting our PLRs as secondary distance indicators, we compiled a catalog of 55,603 CBs candidates, of which 80% have distance estimates based on a combination of optical, near-, and mid-infrared photometry. Using Fourier decomposition, 27,318 high-probability W UMa-type CBs were selected. The resulting 8% distance accuracy implies that our sam- ple encompasses the largest number of objects with accurate distances within a local volume with a radius of 3 kpc available to date. The distribution of W UMa-type CBs in the Galaxy suggests that in different environments, the CB luminosity function may be different: larger numbers of brighter (longer-period) W UMa-type CBs are found in younger environments.
Hide and Seek with Gaia. Detectability of Predicted Thin-Disc Metal-Rich RR Lyrae Binaries in Gaia DR3 and DR4
Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona（巴塞罗那大学宇宙科学研究所）；Department of Astronomy, California Institute of Technology（加州理工学院天文学系）；School of Physics and Astronomy, Monash University（莫纳什大学物理与天文学院）；ARC Centre of Excellence for Gravitational Wave Discovery – OzGrav（ARC引力波发现卓越中心-OzGrav）；INAF – Osservatorio Astrofisico di Arcetri（意大利国家天体物理研究所阿切特里天文台）；Institute of Astronomy, University of Cambridge（剑桥大学天文学研究所）；Department of Physics, University of Rome Tor Vergata（罗马托维加塔大学物理系）；INAF Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Departamento de Astronomía, Instituto de Física, Universidad de la República（乌拉圭共和国大学天文学系、物理研究所）
W UMa-Type Contact Binaries in the Tidal Tails of Young Open Cluster COIN-Gaia 25 and Mamajek 4
Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences（中国科学院天体结构与演化重点实验室）；Center for Astronomical Mega-Science, Chinese Academy of Sciences（中国科学院天文大科学研究中心）；University of Chinese Academy of Sciences（中国科学院大学）
Speckle Interferometry of 25 Gaia Two-Parameter Potential Binaries
Colorado Mountain College（科罗拉多山学院）；Gila Community College（吉拉社区学院）；NASA Ames Research Center（美国国家航空航天局艾姆斯研究中心）；Mesa Community College（梅萨社区学院）；Orange County Astronomers（橙县天文学家协会）；Payson High School（佩森高中）；University of California, Berkeley（加州大学伯克利分校）；OurSky；Institute for Student Astronomical Research（学生天文研究所）；PlaneWave Instruments；Dark Ridge Observatory（暗岭天文台）；NASA Neil Amstrong Flight Test Center（美国国家航空航天局尼尔·阿姆斯特朗飞行测试中心）；Mt. Wilson Observatory（威尔逊山天文台）；Presidio Graduate School（普雷西迪奥研究生院）；Magdalena Transit Telescope Project（马格达莱纳凌星望远镜项目）
Detection of hot subdwarf binaries and sdB stars using machine learning methods and a large sample of Gaia XP spectra
Institute of Theoretical Physics and Astronomy, Vilnius University（维尔纽斯大学理论与天体物理研究所）；Centro de Astrobiología (CSIC-INTA)（天体生物学中心（CSIC-INTA））；Applied Physics Department, Universidade de Vigo（维戈大学应用物理系）；Centro de Investigación Mariña, Universidade de Vigo（维戈大学海洋研究中心）；Universidade da Coruña (UDC)（拉科鲁尼亚大学）；CIGUS CITIC - Department of Computer Science and Information Technologies, University of A Coruña（拉科鲁尼亚大学CIGUS CITIC计算机与信息技术系）；IES de Beade, Conseller ı́a de Educación e Ordenación Universitaria（贝德高中，加利西亚教育及大学统筹部）；Institute of Applied Mathematics, Vilnius University（维尔纽斯大学应用数学研究所）；CIGUS CITIC - Department of Nautical Sciences and Marine Engineering, University of A Coruña（拉科鲁尼亚大学CIGUS CITIC航海科学与海洋工程系）
21,864 Unresolved, Low-mass Binaries Identified via their Overluminosity in \textit{Gaia} DR3 and a Catalog of 347,440 Systems within 100 pc of the Sun
Georgia State University（佐治亚州立大学）；Planétarium de Montréal, Espace pour la Vie（蒙特利尔天文馆，生命空间）；Trottier Institute for Research on Exoplanets, Université de Montréal（特罗蒂尔系外行星研究所，蒙特利尔大学）；Vanderbilt University（范德堡大学）
Symbiotic binaries in the Gaia data. II. Symbiotic candidates from general variability classification in DR3
Charles University（查理大学）；Astronomical Institute, Faculty of Mathematics and Physics, Charles University（查理大学数学物理学院天文研究所）；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Universidad de La Laguna（拉古纳大学）；Southern Spectroscopic Project Observatory Team (2SPOT)（南方光谱计划观测团队（2SPOT））；Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences（波兰科学院尼古拉·哥白尼天文学中心）
Detection of single-degenerate massive binaries with Gaia: The impact of blue supergiants, triples, mass precision, and high-precision parallax requirements
David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto（大卫·A·邓普尔天文与天体物理系，多伦多大学）；McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University（麦克威廉斯宇宙学与天体物理中心，物理系，卡内基梅隆大学）；Institute of Astronomy, KU Leuven（天文学研究所，荷语鲁汶大学）；Leuven Gravity Institute, KU Leuven（鲁汶引力研究所，荷语鲁汶大学）；Center for Computational Astrophysics, Flatiron Institute（计算天体物理学中心，西蒙斯基金会平顿研究所）；Department of Astrophysical Sciences, Princeton University（天体物理科学系，普林斯顿大学）；Department of Astrophysics/IMAPP, Radboud University（天体物理系/IMAPP，拉德堡德大学）
paired: A Statistical Framework for Detecting Stellar Binarity with Gaia RVs. I. Sensitivity to Unresolved Binaries
University of Florida（佛罗里达大学）；Center for Computational Astrophysics, Flatiron Institute（纽约市立学院西蒙斯数据科学研究所计算天体物理中心）；School of Physics & Astronomy, Monash University（蒙纳士大学物理与天文学院）；Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)（三维天体物理学卓越中心）
