NAOC Open IR
Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type Stars
Wang,H.-F.1; Huang,Y.1; Zhang,H.-W.2,3; López-Corredoira,M.4,5; Cui,W.-Y.6; Chen,B.-Q.1; Guo,R.7; Chang,J.8
2020-10-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume902Issue:1
AbstractAbstract We revisit the diagonal ridge feature (diagonal distributions in the R, v? plane) found in Gaia and present a timing analysis for it between Galactocentric distances of R?=?7.5 and 12 kpc, using main-sequence turnoff and OB stars selected from the LAMOST Galactic spectroscopic surveys. We recover the ridge pattern in the R–v? plane color coded by mean radial velocity and find that this feature is presented from very young (OB stars, few hundred megayears) to very old populations (τ?=?9–14 Gyr). Meanwhile, some ridge features are also revealed in the metallicity [Fe/H], [α/Fe], and vz distributions. In the LZ, v? plane, one of the ridge patterns, with constant angular momentum per unit mass, shows variations with different age populations compared. However, the remaining two are relatively stable, implying there might be two kinds of ridge patterns with different dynamical origins and evolutions.
KeywordMilky Way disk Milky Way dynamics Milky Way evolution Milky Way formation the Milky Way
DOI10.3847/1538-4357/abb3c8
Language英语
WOS IDIOP:0004-637X-902-1-abb3c8
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62027
Collection中国科学院国家天文台
Corresponding AuthorWang,H.-F.
Affiliation1.South-Western Institute for Astronomy Research, Yunnan University, Kunming, 650500, People’s Republic of China; hfwang@bao.ac.cn, yanghuang@ynu.edu.cn
2.Department of Astronomy, Peking University, Beijing 100871, People’s Republic of China
3.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China
4.Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain
5.Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
6.Department of Physics, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
7.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
8.Purple Mountain Observatory, the Partner Group of MPI für Astronomie, 2 West Beijing Road, Nanjing 210008, People’s Republic of China
Recommended Citation
GB/T 7714
Wang,H.-F.,Huang,Y.,Zhang,H.-W.,et al. Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type Stars[J]. The Astrophysical Journal,2020,902(1).
APA Wang,H.-F..,Huang,Y..,Zhang,H.-W..,López-Corredoira,M..,Cui,W.-Y..,...&Chang,J..(2020).Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type Stars.The Astrophysical Journal,902(1).
MLA Wang,H.-F.,et al."Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type Stars".The Astrophysical Journal 902.1(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang,H.-F.]'s Articles
[Huang,Y.]'s Articles
[Zhang,H.-W.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang,H.-F.]'s Articles
[Huang,Y.]'s Articles
[Zhang,H.-W.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang,H.-F.]'s Articles
[Huang,Y.]'s Articles
[Zhang,H.-W.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.