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The origin of B-type runaway stars based on kinematics

文献类型：期刊论文

作者Guo YJ(郭彦君)4,5; Liu, Chao3; Liu, ZhiCun2; Li, Chunyan1; Li, Qida6; Chen K(陈琨)4,5; Han ZW(韩占文)4,5; Chen XF(陈雪飞)4,5
刊名ASTRONOMY & ASTROPHYSICS
出版日期2026-01-16
卷号705
关键词methods: data analysis methods: statistical catalogs surveys stars: early-type stars: kinematics and dynamics
ISSN号0004-6361
DOI10.1051/0004-6361/202557420
产权排序第1完成单位
文献子类Article
英文摘要Context. Runaway stars depart their birthplaces with high peculiar velocities. Two mechanisms are commonly invoked to explain their origin, the binary supernova scenario and the dynamical ejection scenario. Investigating the kinematic properties of runaway stars is key to understanding their origins.Aims. We investigated the origins of 39 B-type runaway stars from LAMOST using orbital traceback analysis.Methods. From the LAMOST catalog, we selected 39 B-type runaway stars and determined their spectral subtypes from key absorption lines. We then derived atmospheric parameters for each star using the Stellar Label Machine, which is trained on TLUSTY synthetic spectra computed under the nonlocal thermodynamic equilibrium assumption. Using the derived atmospheric parameters as input, we estimated stellar masses and ages with a machine learning model trained on PARSEC evolutionary tracks. We finally performed orbital traceback with GALPY to analyze their origins.Results. Through orbital traceback, we find that 29 stars have trajectories entirely within the Galactic disk, whereas 10are disk-passing yet still trace back to the disk. Two stars have trajectories that intersect those of known clusters. Their orbits show similar morphologies in both the X - Y and R - Z planes, and their [M/H] values are comparable, suggesting possible cluster origins. However, definitive confirmation will require additional evidence. In addition, the VSp - v sin i plane shows that runaway stars with low peculiar space velocities but high v sin i remain on the Galactic disk, whereas those with high peculiar space velocities but low v sin ipass through the disk, possibly reflecting two distinct origins.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词HORIZONTAL-BRANCH STARS ; OPEN CLUSTERS ; OB STARS ; GAIA DR2 ; LAMOST ; CATALOG ; MASS ; EVOLUTION ; VELOCITIES ; HALO
资助项目National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12125303]; National Natural Science Foundation of China[12090040/3]; National Natural Science Foundation of China[12103064]; National Natural Science Foundation of China[12403039]; National Natural Science Foundation of China[12373036]; National Key R&D Program of China[2021YFA1600403/1]; National Key R&D Program of China[2021YFA1600400]; Natural Science Foundation of Yunnan Province[202201BC070003]; Natural Science Foundation of Yunnan Province[202001AW070007]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; Yunnan Revitalization Talent Support Program-Science, Technology Champion Project[202305AB350003]; Yunnan Fundamental Research Projects[202501CF070018]; New Cornerstone Science Foundation through the XPLORER Prize
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001663324000014
出版者EDP SCIENCES S A
资助机构National Natural Science Foundation of China[12288102, 12125303, 12090040/3, 12103064, 12403039, 12373036] ; National Key R&D Program of China[2021YFA1600403/1, 2021YFA1600400] ; Natural Science Foundation of Yunnan Province[202201BC070003, 202001AW070007] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Yunnan Revitalization Talent Support Program-Science, Technology Champion Project[202305AB350003] ; Yunnan Fundamental Research Projects[202501CF070018] ; New Cornerstone Science Foundation through the XPLORER Prize
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28846]  
专题云南天文台_大样本恒星演化研究组
通讯作者Guo YJ(郭彦君); Chen XF(陈雪飞)
作者单位1.Shanghai NanHui High School Shanghai 200135, People’s Republic of China;
2.Department of Physics, Hebei Normal University Shijiazhuang 050024, People’s Republic of China;
3.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences Beijing 100101, People’s Republic of China;
4.International Centre of Supernovae, Yunnan Key Laboratory Kunming 650216, China;
5.Yunnan observatories, Chinese Academy of Sciences P.O. Box 110 Kunming 650011, China;
6.Department of Astronomy, China West Normal University Nanchong 637002, People’s Republic of China
推荐引用方式
GB/T 7714		 Guo YJ,Liu, Chao,Liu, ZhiCun,et al. The origin of B-type runaway stars based on kinematics[J]. ASTRONOMY & ASTROPHYSICS,2026,705.
APA 郭彦君.,Liu, Chao.,Liu, ZhiCun.,Li, Chunyan.,Li, Qida.,...&陈雪飞.(2026).The origin of B-type runaway stars based on kinematics.ASTRONOMY & ASTROPHYSICS,705.
MLA 郭彦君,et al."The origin of B-type runaway stars based on kinematics".ASTRONOMY & ASTROPHYSICS 705(2026).

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