YNAO OpenIR  > 恒星物理研究组
The Influence of the Metal Mass Fraction Z, Age, and Mixing-length Parameter on the RGB Bump Magnitude for the M4 Cluster
Song, Fen1,2; Li Y(李焱)2,3,4,5; Wu T(吴涛)2,3,5; Pietrinferni, Adriano6; Poon, Helen7; Xie, Yi1
Source PublicationASTROPHYSICAL JOURNAL
2018-12-20
Volume869Issue:2Pages:15
DOI10.3847/1538-4357/aaecd3
Contribution Rank第3完成单位
Indexed BySCI
Keywordglobular clusters: individual (NGC 6121) Hertzsprung-Russell and C-M diagrams stars: evolution stars: general stars: low-mass
Abstract

We identify the location of the RGB bump of M4 (NGC 6121) using the available photometric data, and measure VRGBB (similar to 13.57 +/- 0.04 mag). According to the observed [Fe/H], we compute theoretical isochrones with the scaled-solar composition in the MESA model and alpha-enhanced composition in the BaSTI model, respectively. Using a color-magnitude diagram, we compare these isochrones with the observed data to obtain the magnitude difference delta V-bump between the predicted and the observed bump magnitude. Based on the best fit of the MESA model with [Fe/H] = -1.05, [alpha/Fe] =0, alpha(MLT) = 2.0, and t = 13.3 Gyr, the bump magnitude difference delta V-bump is about 0.46 mag. Based on the best fit of the BaSTI model with alpha(MLT) = 2.2 similar to 2.4, [Fe/H] = -1.05, [alpha/Fe] = 0.4, and t = 12.5 Gyr, the bump magnitude difference delta V-bump is about 0.2 mag. To try and explain the bump magnitude differences, the metal mass fraction Z is enhanced as 0.0037, 0.00591, 0.0076, and 0.0085. Accordingly, delta V-RGBB vertical bar(t=12.0,alpha MLT =2.2, [alpha/Fe] = 0,Z=0.0076), delta V-RGBB vertical bar(t=12.0,alpha MLT) (=2.2, [alpha/Fe]=0, Z=0.0085), and delta V-RGBB vertical bar(t=11.0,alpha MLT=2.4,[alpha/Fe]=0,Z=0.0085) by the MESA model are 0, -0.01, and 0 mag, respectively. Increasing the assumed metallicity can decrease the discrepancy between the predicted and observed bump magnitudes. However, a metallicity increase large enough to resolve the offset, roughly similar to 0.60 dex for the MESA models, is ruled out by the spectroscopic data.

Funding ProjectNSFC of China[11333006] ; NSFC of China[11521303] ; NSFC of China[11373020] ; NSFC of China[11503079] ; NSFC of China[11603009] ; NSFC of China[11503076] ; NSFC of China[11773064] ; NSFC of China[11803009] ; foundation of Chinese Academy of Sciences[XDB09010202] ; Natural Science Foundation of Fujian Province[2016J05013] ; Natural Science Foundation of Fujian Province[2018J05006] ; Natural Science Foundation of Fujian Province[2018J05007] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201404] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[201504150001] ; Yunnan Applied Basic Research Projects[2017B008] ; Scientific Research Foundation of Jimei University[ZQ2013013]
Funding OrganizationNSFC of China[11333006, 11521303, 11373020, 11503079, 11603009, 11503076, 11773064, 11803009] ; foundation of Chinese Academy of Sciences[XDB09010202] ; Natural Science Foundation of Fujian Province[2016J05013, 2018J05006, 2018J05007] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201404, 201504150001] ; Yunnan Applied Basic Research Projects[2017B008] ; Scientific Research Foundation of Jimei University[ZQ2013013]
Language英语
Subject Area天文学 ; 恒星与银河系
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:000453609600007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGALACTIC GLOBULAR-CLUSTERS ; GIANT ; METALLICITY ; LUMINOSITY ; ABUNDANCES ; PHOTOMETRY ; EVOLUTION ; SEQUENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18603
Collection恒星物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorSong, Fen
Affiliation1.College of Science, Jimei University, Xiamen 361021, People's Republic of China
2.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China
3.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China
4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
6.INAF-Osservatorio Astronomico d'Abruzzo, via M. Maggini, I-64100 Teramo, Italy
7.Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 7398526, Japan
Recommended Citation
GB/T 7714
Song, Fen,Li Y,Wu T,et al. The Influence of the Metal Mass Fraction Z, Age, and Mixing-length Parameter on the RGB Bump Magnitude for the M4 Cluster[J]. ASTROPHYSICAL JOURNAL,2018,869(2):15.
APA Song, Fen,Li Y,Wu T,Pietrinferni, Adriano,Poon, Helen,&Xie, Yi.(2018).The Influence of the Metal Mass Fraction Z, Age, and Mixing-length Parameter on the RGB Bump Magnitude for the M4 Cluster.ASTROPHYSICAL JOURNAL,869(2),15.
MLA Song, Fen,et al."The Influence of the Metal Mass Fraction Z, Age, and Mixing-length Parameter on the RGB Bump Magnitude for the M4 Cluster".ASTROPHYSICAL JOURNAL 869.2(2018):15.
Files in This Item:
File Name/Size DocType Version Access License
The Influence of the(2553KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Song, Fen]'s Articles
[Li Y(李焱)]'s Articles
[Wu T(吴涛)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Song, Fen]'s Articles
[Li Y(李焱)]'s Articles
[Wu T(吴涛)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Song, Fen]'s Articles
[Li Y(李焱)]'s Articles
[Wu T(吴涛)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: The Influence of the Metal Mass Fraction Z, Age, and Mixing-length Parameter on the RGB Bump Magnitude for the M4 Cluster.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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