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A New Photometric Study of Ap and Am Stars in the Infrared
Chen PS(陈培生); Liu JY(刘杰英); Dan HG(单红光); Chen, P. S.(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China)
发表期刊ASTRONOMICAL JOURNAL
2017-05-01
卷号153期号:5页码:218-247
DOI10.3847/1538-3881/aa679a
产权排序第1完成单位
收录类别SCI
关键词Infrared: Stars Stars: Peculiar
摘要In this paper, 426 well known confirmed Ap and Am stars are photometrically studied in the infrared. The 2MASS, Wide-field Infrared Survey Explorer (WISE), and IRAS data are employed to make analyses. The results in this paper have shown that in the 1-3 mu m region over 90% Ap and Am stars have no or little infrared excesses, and infrared radiations in the near-infrared from these stars are probably dominated by the free-free emissions. It is also shown that in the 3-12 mu m region, the majority of Ap stars and Am stars have very similar behavior, i.e., in the W1-W2 (3.4-4.6 mu m) region, over half of Ap and Am stars have clear infrared excesses, which are possibly due to the binarity, the multiplicity, and/or the debris disk, but in the W2-W3 (4.6-12 mu m) region they have no or little infrared excess. In addition, in the 12-22 mu m region, some of Ap stars and Am stars show the infrared excesses and infrared radiations for these Ap and Am stars are probably due to the free-free emissions. In addition, it is seen that the probability of being the binarity, the multiplicity and/or the debris disk for Am stars is much higher than that for Ap stars. Furthermore, it can be seen that, in general, no relations can be found between infrared colors and spectral types either for Ap stars or for Am stars.
项目资助者National Nature Science Foundation of China(11373067, 11303086)
语种英语
学科领域天文学
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2017-05-19
WOS记录号WOS:000399746700004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CHEMICALLY PECULIAR STARS ; UPPER MAIN-SEQUENCE ; SPECTROSCOPIC BINARIES ; INTRINSIC COLORS ; CP STARS ; B-STAR ; SYSTEMS ; MULTIPLICITY ; PASSBANDS ; PARAMETERS
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/10175
专题其他
中国科学院天体结构与演化重点实验室
通讯作者Chen, P. S.(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China)
作者单位Yunnan Observatories and Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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GB/T 7714
Chen PS,Liu JY,Dan HG,et al. A New Photometric Study of Ap and Am Stars in the Infrared[J]. ASTRONOMICAL JOURNAL,2017,153(5):218-247.
APA Chen PS,Liu JY,Dan HG,&Chen, P. S..(2017).A New Photometric Study of Ap and Am Stars in the Infrared.ASTRONOMICAL JOURNAL,153(5),218-247.
MLA Chen PS,et al."A New Photometric Study of Ap and Am Stars in the Infrared".ASTRONOMICAL JOURNAL 153.5(2017):218-247.
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