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Physical properties of gamma Doradus pulsating stars and their relationship with long-period delta Scuti variables
Qian SB(钱声帮)1,2,3,4; Li LJ(李临甲)1,2,3; He JJ(何家佳)1,2,3; Zhang J(张嘉)1,2,3; Zhu LY(朱俐颖)1,2,3,4; Han ZT(韩忠涛)1,2,3
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2019
Volume19Issue:1Pages:20
DOI10.1088/1674-4527/19/1/1
Contribution Rank第1完成单位
Indexed BySCI
Keywordstars: fundamental parameters stars: oscillations stars: binaries: spectroscopic stars: variables: other
Abstract

We present LAMOST data on 168 gamma Doradus (gamma Dor) pulsating stars including stellar atmospheric parameters of 137 variables and spectral types for all of the samples. The distributions of period (P), temperature (T), gravitational acceleration (log(g)) and metallicity [Fe/H] are shown. It is found that most gamma Dor variables are main-sequence stars with early F spectral types and temperatures from 6880 K to 7280 K. They are slightly more metal poor than the Sun with a metallicity range from -0. 4 to 0. On the H-R and log g - T diagrams, both the gamma Dor and delta Scuti (delta Sct) stars occupy in the same region and some are beyond the borders predicted by current stellar pulsation theories. It is discovered that the physical properties of gamma Dor stars are similar to those of long-period delta Sct (P > 0. 3 d) stars. The stellar atmospheric parameters are all correlated with the pulsation period for short-period delta Sct variables (P < 0. 3 d), but there are no such relations for gamma Dor or long-period delta Sct stars. These results reveal that gamma Dor and long-period delta Sct are the same group of pulsating stars and they are different from short-period delta Sct variables. Meanwhile, 33 gamma Dor stars are identified as candidates of binary or multiple systems.

Funding ProjectNational Development and Reform Commission
Funding OrganizationNational Development and Reform Commission
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeEditorial Material
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000456345900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLINE-PROFILE VARIATIONS ; ECLIPSING BINARY ; ATMOSPHERIC PARAMETERS ; MULTICOLOR PHOTOMETRY ; DOR ; CATALOG ; CONVECTION ; TELESCOPE ; MISSION ; SCT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18910
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorQian SB(钱声帮)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China
4.University of Chinese Academy of Sciences, Beijing 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Li LJ,He JJ,et al. Physical properties of gamma Doradus pulsating stars and their relationship with long-period delta Scuti variables[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(1):20.
APA Qian SB,Li LJ,He JJ,Zhang J,Zhu LY,&Han ZT.(2019).Physical properties of gamma Doradus pulsating stars and their relationship with long-period delta Scuti variables.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(1),20.
MLA Qian SB,et al."Physical properties of gamma Doradus pulsating stars and their relationship with long-period delta Scuti variables".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.1(2019):20.
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