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THE RELATIONSHIP BETWEEN nu(max) AND AGE t FROM ZAMS TO RGB-TIP FOR LOW-MASS STARS
Tang, Y. K.1,2,3; Gai, N.1,2
Source PublicationASTROPHYSICAL JOURNAL
2013-07-10
Volume771Issue:2
DOI10.1088/0004-637X/771/2/99
Indexed BySCI
KeywordStars: Evolution Stars: Low-mass Stars: Oscillations
Abstract

Stellar age is an important quantity in astrophysics, which is useful for many fields both in the universe and galaxies. It cannot be determined by direct measurements, but can only be estimated or inferred. We attempt to find a useful indicator of stellar age, which is accurate from the zero-age main sequence to the tip of red giant branch for low-mass stars. Using the Yale Rotation and Evolution Code (YREC), a grid of stellar models has been constructed. Meanwhile, the frequency of maximum oscillations' power nu(max) and the large frequency separation Delta nu are calculated using the scaling relations. For the stars, the masses of which are from 0.8M(circle dot) to 2.8M(circle dot), we can obtain the nu(max) and stellar age by combing the scaling relations with the four sets of grid models (YREC, Dotter et al., Marigo et al., and YY isochrones). We find that nu(max) is tightly correlated and decreases monotonically with the age of the star from the main sequence to the red giant evolutionary stages. Moreover, we find that the line shapes of the curves in the Age versus nu(max) diagram, which is plotted by the four sets of grid models, are consistent for red giants with masses from 1.1 M-circle dot to 2.8 M-circle dot. For red giants, the differences of correlation coefficients between Age and nu(max) for different grid models are minor and can be ignored. Interestingly, we find two peaks that correspond to the subgiants and bump of red giants in the Age versus nu(max) diagram. By general linear least-squares, we make the polynomial fitting and deduce the relationship between log(Age) and log(nu(max)) in red giants' evolutionary state.

Funding ProjectNational Natural Science Foundation of China[11203006] ; Shandong Provincial Natural Science Foundation of China[ZR2012AQ029] ; Shandong Provincial Natural Science Foundation of China[ZR2012AM008] ; Shandong Provincial Natural Science Foundation of China[JQ201212] ; Dezhou University Foundation[402126] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201102] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201206]
Funding OrganizationNational Natural Science Foundation of China[11203006] ; Shandong Provincial Natural Science Foundation of China[ZR2012AQ029, ZR2012AM008, JQ201212] ; Dezhou University Foundation[402126] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201102, OP201206]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000321340700024
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSOLAR-LIKE OSCILLATIONS ; STELLAR EVOLUTION CODE ; RED GIANTS ; ASTEROSEISMIC DIAGRAMS ; MAIN-SEQUENCE ; NGC 6819 ; KEPLER ; ISOCHRONES ; ABUNDANCES ; OPACITIES
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9421
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorTang, Y. K.
Affiliation1.Department of Physics, Dezhou University, Dezhou 253023, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Weihai 264209, China
Recommended Citation
GB/T 7714
Tang, Y. K.,Gai, N.. THE RELATIONSHIP BETWEEN nu(max) AND AGE t FROM ZAMS TO RGB-TIP FOR LOW-MASS STARS[J]. ASTROPHYSICAL JOURNAL,2013,771(2).
APA Tang, Y. K.,&Gai, N..(2013).THE RELATIONSHIP BETWEEN nu(max) AND AGE t FROM ZAMS TO RGB-TIP FOR LOW-MASS STARS.ASTROPHYSICAL JOURNAL,771(2).
MLA Tang, Y. K.,et al."THE RELATIONSHIP BETWEEN nu(max) AND AGE t FROM ZAMS TO RGB-TIP FOR LOW-MASS STARS".ASTROPHYSICAL JOURNAL 771.2(2013).
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