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Search for age pattern across spiral arms of the Milky Way
He, Zhi-Hong1,2; Xu, Ye1; Hou, Li-Gang3,4
2021
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume21Issue:1Pages:10
AbstractThe age pattern across spiral arms is one of the key observational features utilised to study the dynamic nature of the Galaxy's spiral structure. With the most updated samples of high-mass star formation region (HMSFR) masers, O stars and open clusters, we investigated their distributions and kinematic properties in the vicinity of the Sun. We found that the Sagittarius-Carina Arm traced by HMSFRs, O stars (less than or similar to 10 Myr) and young open clusters (<30 Myr) seem to deviate gradually towards the Galactic Anticenter (GAC) direction. The Local Arm traced by HMSFRs, O stars, young clusters and also medium-young clusters (30-100 Myr) are inclined to gradually deviate toward the Galactic Center (GC) direction. The properties for the Local Arm are supported by a simplified simulation of cluster motions in the Galaxy. Indications of systematic motions in the circular and radial velocities are noticed for the old open clusters (>200 Myr). These results are consistent with the idea that star formation can be triggered by spiral shocks of density waves, and indicate that the corotation radius of the Galaxy is located between the Sagittarius-Carina Arm and the Local Arm, close to the Solar circle.
KeywordGalaxy: disk Galaxy: structure Galaxy: kinematic and dynamics open clusters and associations: general Stars: massive
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS
DOI10.1088/1674-4527/21/1/9
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFA0402701] ; National Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11933011] ; National Natural Science Foundation of China[11833009] ; Youth Innovation Promotion Association, CAS
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000616051900001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79620
Collection中国科学院国家天文台
Corresponding AuthorHe, Zhi-Hong
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
He, Zhi-Hong,Xu, Ye,Hou, Li-Gang. Search for age pattern across spiral arms of the Milky Way[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(1):10.
APA He, Zhi-Hong,Xu, Ye,&Hou, Li-Gang.(2021).Search for age pattern across spiral arms of the Milky Way.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(1),10.
MLA He, Zhi-Hong,et al."Search for age pattern across spiral arms of the Milky Way".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.1(2021):10.
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