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LAMOST views delta Scuti pulsating stars
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; Qian SB(钱声帮), Email: qsb@ynao.ac.cn
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-03-01
卷号475期号:1页码:478-491
DOI10.1093/mnras/stx3185
产权排序第1完成单位
收录类别SCI
关键词Binaries: General Stars: Fundamental Parameters Stars: Oscillations Stars: Variables: Scuti
摘要About 766 delta Scuti stars were observed by LAMOST by 2017 June 16. Stellar atmospheric parameters of 525 variables were determined, while spectral types were obtained for all samples. In the paper, those spectroscopic data are catalogued. We detect a group of unusual and cool variable stars (UCVs) that are distinguished from the normal delta Scuti stars (NDSTs). On the H-R diagram and the log g-T diagram, the UCVs are far beyond the red edge of pulsational instability trip. Their effective temperatures are lower than 6700 K with periods in the range from 0.09 to 0.22 d. NDSTs have metallicity close to that of the Sun as expected, while UCVs are slightly metal poor than NDSTs. The two peaks on the distributions of the period and stellar atmospheric parameters are all caused by the existence of UCVs. When those UCVs are excluded, it is discovered that the effective temperature, the gravitational acceleration, and the metallicity all are correlated with the pulsating period for NDSTs and their physical properties and evolutionary states are discussed. Detection of those UCVs indicates that about 25 per cent of the known delta Scuti stars may be misclassified. However, if some of them are confirmed to be pulsating stars, they will be a new-type pulsator and their investigations will shed light on theoretical instability domains and on the theories of interacting between the pulsation and the convection of solar-type stars. Meanwhile, 88 delta Scuti stars are detected to be the candidates of binary or multiple systems.
项目资助者National Natural Science Foundation of China(11325315) ; National Development and Reform Commission
语种英语
学科领域天文学
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000427144200038
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SKY AUTOMATED SURVEY ; RR LYRAE STARS ; VARIABLE-STARS ; TELESCOPE LAMOST ; ECLIPSING BINARY ; RADIAL-VELOCITY ; SX PHOENICIS ; DATA RELEASE ; CATALOG ; OSCILLATIONS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12303
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Qian SB(钱声帮), Email: qsb@ynao.ac.cn
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), PO Box 110, 650216 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, 650216 Kunming, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang Dis- trict, 100012 Beijing, P. R. China
4.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
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Qian SB,Li LJ,He JJ,et al. LAMOST views delta Scuti pulsating stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,475(1):478-491.
APA Qian SB.,Li LJ.,He JJ.,Zhang J.,Zhu LY.,...&Qian SB.(2018).LAMOST views delta Scuti pulsating stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,475(1),478-491.
MLA Qian SB,et al."LAMOST views delta Scuti pulsating stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 475.1(2018):478-491.
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