An advanced approach for definition of the "Milky Way galaxies-analogues"
Iryna B. Vavilova, Petr M. Fedorov, Daria V. Dobrycheva, Olga Sergijenko, Anatolii A. Vasylenko, Artem M. Dmytrenko, Vlad P. Khramtsov, Olena V. Kompaniiets
我们的星系——银河系——具有特定的结构与演化特征。在搜寻银河系类似星系(Milky Way galaxies-analogues,简称MWAs)时,通常会考虑形态、光度、运动学以及化学动力学性质。若能以更多同步选择参数、且对各参数设置更严格的约束来发现MWA星系,得到的MWA星系样本其性质会更接近银河系的真实性质。因此总体而言,人们会将银河系的各类参数(如形态类型、光度、色指数、结构参数(尺度、棒、核球、薄盘与厚盘、内环、晕)、核球占总质量比、恒星质量、恒星形成率、金属丰度以及旋转速度)以不同组合形式,用于与其他星系进行比较。然而,银河系的部分特征在MWAs特征的多参数空间中应当存在显著偏移。本文旨在简要概述该问题的研究现状,并介绍我们用于研究银河系与MWAs匹配特征的方法(本项目由乌克兰国家研究基金资助)。我们提出要尽可能扩充银河系特征的数量,并在我们的共动宇宙学体积内构建不同的MWAs样本,以便后续对样本进行优化。这类特征可包括特定区域内恒星运动的三维运动学、外围低氧含量、低核活动,以及过去100亿年(10 Gyrs)内未发生显著并合(孤立判据)。该方法将能够广泛地明确探测MWA星系的充要条件,同时揭示银河系的其他多波段特征。
英文摘要:
Our Galaxy - the Milky Way - has certain features of the structure and evolution. The morphological, photometric, kinematic, and chemodynamical properties are usually considered in the search for the Milky Way galaxies-analogues (MWAs). The discovery of MWA galaxies with a larger number of simultaneous selection parameters and more stringent constraints on a given parameter yields a sample of MWA galaxies with properties closer to the true properties of the Milky Way. So, in general, such MW parameters as the morphological type, luminosity, color indices, structural parameters (size, bar, bulge, thin and thick disks, inner ring, halo), bulge to total ratio, stellar mass, star formation rate, metallicity, and rotation velocity were used in various combinations for comparison with other galaxies. However, the offset of some MW features in the multiparameter space of MWAs features should be significant. The paper aims to give a brief overview of the problematics and to present our approach for studying Milky Way and MWAs matching characteristics (this project is supported by the National Research Fund of Ukraine). We propose to enlarge as much as possible the number of Milky Way features and compile various samples of MWAs in our comoving cosmological volume for their further optimization. Such features can include 3Dkinematics of star's movement in certain regions, low oxygen content on the periphery, low nuclear activity, and the lack of significant merging over the past 10 Gyrs (isolation criterion). This approach will make it possible to widely formulate the necessary and sufficient conditions for the detection of MWA galaxies as well as to reveal other MW multiwavelength features.
Molecular Gas Morphological Analogues for the Milky Way
The University of Texas at Austin(德克萨斯大学奥斯汀分校);INAF-IAPS(意大利国家天体物理研究所国际天体物理中心);INAF, Sezione di Lecce(意大利国家天体物理研究所莱切分部);National Astronomical Observatory of Japan(日本国立天文台);Max Planck Institute for Radio Astronomy(马克斯·普朗克射电天文研究所);University of Kentucky(肯塔基大学)
Bulgeless Evolution And the Rise of Discs (BEARD) II. The role of mergers in shaping the Milky Way analogues in TNG50
Donostia International Physics Centre (DIPC)(多诺西亚国际物理中心);Universidad de Córdoba(科尔多瓦大学);Universidad de La Laguna(拉帕尔马大学);Instituto de Astrofísica de Canarias(加那利群岛天体物理学研究所)
Environmental Dependence of Satellite Planarity and Orbital-Pole Coherence around Milky Way Analogues in a Hydrodynamical Cosmological Simulation
Shanghai Astronomical Observatory, Chinese Academy of Sciences(中国科学院上海天文台);Department of Physics, School of Physics and Electronics, Hunan Normal University(湖南师范大学物理科学与电子学院);Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);Institute of Astronomy, School of physics, Zhejiang University(浙江大学物理学院天体物理研究所);Institute of Astronomy and Physics, Inner Mongolia University(内蒙古大学天文与物理学院);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台)
The chemodynamical memory of a major merger in a NIHAO-UHD Milky Way analogue -- I. A golden thread through time and space
Australian National University(澳大利亚国立大学);Universität Heidelberg(海德堡大学);Universitá degli Studi di Firenze(佛罗伦萨大学);The Observatories of the Carnegie Institution for Science(卡内基科学研究所天文台);Northwestern University(西北大学);New Mexico State University(新墨西哥州立大学);University of Cambridge(剑桥大学)
The chemodynamical memory of a major merger in a NIHAO-UHD Milky Way analogue -- II. Were Splash stars heated or already born hot?
Research School of Astronomy and Astrophysics, Australian National University(澳大利亚国立大学天文与天体物理研究学院);Universität Heidelberg, Interdisziplinäres Zentrum für Wissenschaftliches Rechnen(海德堡大学跨学科科学计算中心);Universität Heidelberg, Zentrum für Astronomie, Institut für Theoretische Astrophysik(海德堡大学天文学中心理论天体物理研究所);Dipartimento di Fisica e Astronomia, Universitá degli Studi di Firenze(佛罗伦萨大学物理与天文学系);The Observatories of the Carnegie Institution for Science(卡内基科学机构天文台);Institute of Astronomy, University of Cambridge(剑桥大学天文学研究所);Department of Astronomy, New Mexico State University(新墨西哥州立大学天文学系)
The Diffuse Gamma-ray Sky of a Milky Way Analogue: Local Diversity and Global Constraints
Universität Heidelberg(海德堡大学);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Leibniz-Institut für Astrophysik Potsdam (AIP)(波茨坦莱布尼茨天体物理研究所);University of Vienna(维也纳大学);Max-Planck-Institut für Kernphysik(马克斯·普朗克核物理研究所);Université Paris-Saclay(巴黎萨克雷大学);Université Paris-Cité(巴黎西岱大学);CEA(法国原子能和替代能源委员会);CNRS(法国国家科学研究中心);AIM(天体物理学与宇宙学研究所);Université Lyon 1(里昂第一大学);ENS de Lyon(里昂高等师范学院);CRAL(里昂天体物理研究中心)
Bulgeless Evolution And the Rise of Discs (BEARD) III. A numerical simulation view of satellites around Milky-Way analogues
Universidad de La Laguna(拉各拉大学);Instituto de Astrofísica de Canarias(加那利天体物理研究所);Donostia International Physics Centre (DIPC)(多诺斯蒂亚国际物理中心);Universidad de Córdoba(科尔多瓦大学)
NGC3521 as the Milky Way analogue: spectral energy distributon from UV to Radio and photometric variability
Main Astronomical Observatory of the National Academy of Sciences of Ukraine(乌克兰国家科学院主天文台);Faculty of Physics, Taras Shevchenko National University of Kyiv(基辅塔拉斯舍甫琴科国立大学物理学院);International Center for Astronomical, Medical and Ecological Research(国际天文、医学与生态研究中心)