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An Asymmetric Galactic Stellar Disk Traced by OB-type Stars from LAMOST DR7: 《Research in Astronomy and Astrophysics》2024年第6期38-51,共14页Xiaopeng Liu Hao Tian Wenyuan Cui Linlin Li Jiaming Liu Zhenyan Huo Yawei Gao; supported by the National Natural Science Foundation of China(NSFC,grant Nos.12173013,12103062,12003045,and 11903012);the National Key Basic R&D Program of China via 2019YFA0405500;supported by the Natural Science Foundation of Hebei Province under grant A2021205006 and A2019205166;by the project of the Hebei provincial department of science and technology under grant number 226Z7604G;the science research grants from the China Manned Space Project。; Using 9943 OB-type stars from LAMOST DR7 in the solar neighborhood,we fit the vertical stellar density profile with the model including a single exponential distribution at different positions(R,Φ).The distributions ...; 关键词：Galaxy:disk galaxies:spiral stars:early-type stars:massive

Formation of a Rapidly Rotating Classical Be-star in a Massive Close Binary System: 《Research in Astronomy and Astrophysics》2024年第1期44-50,共7页Evgeny Staritsin; supported by the Ministry of Science and Education;FEUZ-2023-0019。; This paper investigates the spin-up of a mass-accreting star in a close binary system passing through the first stage of mass exchange in the Hertzsprung gap. Inside an accreting star, angular momentum is carried by m...; 关键词：(stars:)binaries(including multiple):close stars:emission-line BE stars:early-type stars:rotation

Analysis of X-Ray Emission from OB Stars. IV. About X-Ray Emission from Inhomogeneous Winds of OB Stars: 《Research in Astronomy and Astrophysics》2023年第10期387-405,共19页Elizaveta Ryspaeva Alexander Kholtygin; the support by the Russian Science Foundation grant 23-22-00090。; We study the origin of X-ray emission from OB stars due to collisions of stellar winds and/or inhomogeneities in the winds. The low-resolution X-ray spectra of a big sample of OB stars were fitted by both the stationa...; 关键词：stars:early-type stars:statistics X-rays:stars

A Catalog and Statistical Analysis for Magnetic Stars: 《Research in Astronomy and Astrophysics》2023年第9期264-308,共45页Abdurepqet Rustem Guo-Liang Lü Jin-Zhong Liu Chun-Hua Zhu Yu Zhang Dong-Xiang Shen Yu-Hao Zhang Xiao-Long He; the generous support of the National Natural Science Foundation of China(NSFC,Grant Nos.U2031204,12163005 and 12288102);the Natural Science Foundation of Xinjiang Nos.2021D01C075,2022D01D85,2022TSYCLJ0006 and 2022D01E86;the science research grants from the China Manned Space Project with Nos.CMSCSST-2021-A10 and CMS-CSST-2021-A08;the Chinese Academy of Sciences(CAS)“Light of West China”Program,No.2022-XBQNXZ-013。; Magnetic fields are significant in the structure and evolution of stars. We present a comprehensive catalog of 1784known magnetic stars, detailing their identifications, HD numbers, precise locations, spectral types a...; 关键词：STARS early-type-stars chemically peculiar-stars magnetic field-catalogs

Physical Parameters of W UMa Type Contact Binaries and Their Stability of Mass Transfer: 《Research in Astronomy and Astrophysics》2023年第4期15-25,共11页Berikol Tekeste Gebreyesus Seblu Humne Negu; the Space Science and Geospatial Institute (SSGI) -Entoto Observatory and Research Center (EORC)Astronomy and Astrophysics Department for supporting this research。; In this study,we determined the physical parameters of W UMa type contact binaries and their stability of mass transfer with different stellar mass ranges over a broad space by applying the basic dynamical evolution e...; 关键词：(stars:)binaries(including multiple) close-(stars:)binaries general-stars evolution-stars damental parameters-stars early-type-stars late-type-stars low-mass-stars luminosity function-mass ction-stars MASS-LOSS

Large-scale CO(J=1-0)Observations toward the M120.1+3.0 Molecular Cloud:A Filament with a Chain of Starburst Clusters: 《Research in Astronomy and Astrophysics》2023年第1期217-241,共25页Li Sun Xuepeng Chen Jiancheng Feng Min Fang Shiyu Zhang Weihua Guo Yan Sun Yang Su Shaobo Zhang Miaomiao Zhang Xiao-Long Wang Qing-Zeng Yan Xin Zhou Ji Yang; supported by the National Key R&D Program of China(grant No.2017YFA0402702);the National Natural Science Foundation of China(NSFC,Grant Nos.12041305,12173090 and 12073079);the CAS International Cooperation Program(grant No.114332KYSB20190009);sponsored by the National Key R&D Program of China with grant 2017YFA0402701;the CAS Key Research Program of Frontier Sciences with grant QYZDJ-SSW-SLH047。; We present large-scale(2°×2°)observations toward the molecular cloud M120.1+3.0,using ^(12)CO,^(13)CO and C^(18)O(J=1-0)data from the Purple Mountain Observatory 13.7 m millimeter telescope.The distance of the clou...; 关键词：ISM clouds-ISM jets and outflows-ISM kinematics and dynamics-ISM structure-stars EARLY-TYPE

Photometric Properties and Stellar Parameters of the Rapidly Rotating Magnetic Early-B Star HD 345439: 《Research in Astronomy and Astrophysics》2023年第1期18-31,共14页Dong-Xiang Shen Jin-Zhong Liu Chun-Hua Zhu Guo-Liang Lü Yu Zhang Cheng-Long Lü Hao-Zhi Wang Lei Li Xi-Zhen Lu Jin-Long Yu Abdurepqet Rustem; the generous support of the Natural Science Foundation of Xinjiang No.2021D01C075;the National Natural Science Foundation of China under grants U2031204,12163005 and 11863005;the science research grants from the China Manned Space Project with Nos.CMS-CSST-2021-A08 and CMS-CSST-2021-A10;the science research grants from National Key R&D Program of China(2022YFE0126200);National Major Scientific Project built by the Chinese Academy of Sciences;provided by the National Development and Reform Commission;provided by the NASA Explorer Program;operated by the Association of Universities for Research in Astronomy,Inc.,under NASA contract NAS 526555。; We first present the multicolor photometry results of the rapidly rotating magnetic star HD 345439 using the Nanshan One-meter Wide-field Telescope.From the photometric observations,we derive a rotational period of 0....; 关键词：STARS chemically peculiar-stars early-type-stars fundamental parameters-stars magnetic field

The Spin-up of a Star Gaining Mass in a Close Binary System on the Thermal Time Scale: 《Research in Astronomy and Astrophysics》2022年第10期158-164,共7页Evgeny Staritsin; supported by the Ministry of Science and Education,FEUZ-2020-0030。; We investigate the exchange of mass in a binary system as a channel through which a Be star can receive a rapid rotation.The mass-transfer phase in a massive close binary system in the Hertzsprung-gap is accompanied b...; 关键词：(stars:)binaries(including multiple) close-stars emission-line Be-stars rotation-stars EARLY-TYPE

New Massive Contact Twin Binary in a Radio-quiet HⅡRegion Associated with the M17 Complex: 《Research in Astronomy and Astrophysics》2022年第3期205-220,共16页Jia Yin Zhiwei Chen Yongqiang Yao Jian Chen Bin Li Zhibo Jiang; supported by National Key Research&Development Program of China(2017YFA0402702);the science research grants from the China Manned Space Project with No.CMS-CSST-2021-B06;support from the general grants U2031202,11903083 and 11973004 of the National Natural Science Foundation of China;Funding for the DPAC has been provided by national institutions,in particular the institutions participating in the Gaia Multilateral Agreement。; Early-B stars,much less energetic than O stars,may create an HⅡregion that appears as radio-quiet.We report the identification of new early-B stars associated with the radio-quiet HⅡregion G014.645–00.606 in the M1...; 关键词：stars:massive stars:early-type (stars:)binaries:eclipsing stars:fundamental parameters

Application of Random Forest Regressions on Stellar Parameters of A-type Stars and Feature Extraction被引量：1: 《Research in Astronomy and Astrophysics》2022年第2期189-194,共6页Shu-Xin Chen Wei-Min Sun Ying He; Supported by the National Science Foundation for Young Scientists of China Grant No.11800313;the Joint Research Fund in Astronomy(U2031142)under cooperative agreement between the National Natural Science Foundation of China(NSFC)and Chinese Academy of Sciences(CAS);Technology Innovation Center of Agricultural Multi-Dimensional Sensor Information Perception,Heilongjiang Province。; Measuring the stellar parameters of A-type stars is more difficult than FGK stars because of the sparse features in their spectra and the degeneracy between effective temperature(T_(eff))and gravity(log g).Modeling th...; 关键词：methods:data analysis surveys stars:early-type stars:abundances

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