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Scientific objectives of the Hot Universe Baryon Surveyor(HUBS) mission

中国科学:物理学、力学、天文学英文版 2023年第9期66卷 134-178页

作者： Joel Bregman Renyue Cen Yang Chen Wei Cui Taotao Fang Fulai Guo Edmund Hodges-Kluck Rui Huang Luis C.Ho Li Ji Suoqing Ji Xi Kang Xiaoyu Lai Hui Li Jiangtao Li Miao Li Xiangdong Li Yuan Li Zhaosheng Li Guiyun Liang Helei Liu Wenhao Liu Fangjun Lu Junjie Mao Gabriele Ponti Zhijie Qu Chenxi Shan Lijing Shao Fangzheng Shi Xinwen Shu Lei Sun Mouyuan Sun Hao Tong Junfeng Wang Junxian Wang Q.Daniel Wang Song Wang Tinggui Wang Weiyang Wang Zhongxiang Wang Dandan Xu Haiguang Xu Heng Xu Renxin Xu Xiaojie Xu Yongquan Xue Hang Yang Feng Yuan Shuinai Zhang Yuning Zhang Zhongli Zhang Yuanyuan Zhao Enping Zhou Ping Zhou Department of Astronomy University of MichiganAnn Arbor MI 48109-1107USA Institute for Astronomy School of PhysicsZhejiang UniversityHangzhou 310027China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Modern Astronomy and Astrophysics Nanjing UniversityNanjing 210023China Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Astronomy Xiamen UniversityXiamen 361005China Astrophysics Division Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China NASA Goddard Space Flight Center Greenbelt MD 20771USA Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Department of Physics and Astronomy Hubei University of EducationWuhan 430205China Department of Physics University of North TexasDenton TX 76203USA Key Laboratory of Stars and Interstellar Medium Xiangtan UniversityXiangtan 411105China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Physical Science and Technology Xinjiang UniversityUrumuqi 830046China Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China INAF-Osservatorio Astronomico di Brera Merate(LC)I-23807Italy Department of Astronomy&Astrophysics the University of ChicagoChicago IL 60637USA School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics Anhui Normal UniversityWuhu 241002China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Department of Astronomy University of Science and Technology of ChinaHefei 230026China Depart

The Hot Universe Baryon Surveyor(HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spatially-resolved high-resolution spectroscopy and large field of view,the HUBS mission will be uniquely qualified to measure the physical and chemical properties of the hot gas in the interstellar medium, the circumgalactic medium, the intergalactic medium, and the intracluster medium. These measurements will be valuable for two key scientific goals of HUBS, namely to unravel the AGN and stellar feedback physics that governs the formation and evolution of galaxies, and to probe the baryon budget and multi-phase states from galactic to cosmological scales. In addition to these two goals, the HUBS mission will also help us solve some problems in the fields of galaxy clusters, AGNs, difuse X-ray backgrounds, supernova remnants, and compact objects. This paper discusses the perspective of advancing these fields using the HUBS telescope.

关键词： X-ray telescopes galactic halo X-ray sources

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Neutron-Capture Elements in the Double-Enhanced Star HE 1305-0007： a New s- and r-Process Paradigm

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Chinese Physics Letters 2007年第5期24卷 1417-1420页

作者：崔文元崔冬暖杜云霜张波 Department of Physics Hebei Normal University Shijiazhuang 050016 National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Graduate School of the Chinese Academy of Sciences Beijing 100049

The star HE 1305-0007 is a metal-poor double-enhanced star with metallicity [Fe/H] = -2.0, which is just at the upper limit of the metallicity for the observed double-enhanced stars. Using a parametric model, we find that almost all s-elements were made in a single neutron exposure. This star should be a member of a post-commonenvelope binary. After the s-process material has experienced only one neutron exposure in the nucleosynthesis region and is dredged-up to its envelope, the AGB evolution is terminated by the onset of common-envelope evolution. Based on the high radial-velocity of HE 1305-0007, we speculate that the star could be a runaway star from a binary system, in which the AIC event has occurred and produced the r-process elements.

关键词： ASYMPTOTIC GIANT BRANCH METAL-POOR STARS RICH STARS galactic halo CARBONSTARS DREDGE-UP EVOLUTION NUCLEOSYNTHESIS MODEL ORIGIN

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Low-α metal-rich stars with sausage kinematics in the LAMOST survey: Are they from the Gaia-Sausage-Enceladus galaxy?

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Science China(Physics,Mechanics & Astronomy) 2021年第3期64卷 14-26页

作者： Gang Zhao Yuqin Chen CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China

We search for metal-rich Sausage-kinematic(MRSK)stars with[Fe/H]>−0.8 and−100galactic *** the first... 详细信息

We search for metal-rich Sausage-kinematic(MRSK)stars with[Fe/H]>−0.8 and−100galactic *** the first time,we find a group of low-αMRSK stars,and classify it as a metal-rich tail of the GSE galaxy based on the chemical and kinematical *** group has slightly larger R_(apo),Z_(max) and Etot distributions than a previously-reported high-α*** low-αratio does not allow for an origin resulting from the splash process of the GSE merger event,as is proposed to explain the high-αgroup.A hydrodynamical simulation by Amarante et *** a promising solution,in which the GSE galaxy is a clumpy Milky-Way analogue that develops a bimodal disk *** scenario explains the existence of MRSK stars with both high-αand low-αratios found in this *** is further supported by another new feature that a clump of MRSK stars is located at Z_(max)=3-5 kpc,which corresponds to the widely adopted disk-halo transition at|Z|∼4 *** suggest that a pile-up of MRSK stars at Zmax contributes significantly to this disk-halo transition,an interesting imprint left by the GSE merger *** results also provide an important implication on the connection between the GSE and the Virgo Radial Merger.

关键词： galactic halo spiral arms and galactic disk chemical composition and chemical evolution kinematics and dynamics rotation

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