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题名:
A New Photometric Study of Ap and Am Stars in the Infrared
作者: Chen PS(陈培生)1; Liu, J. Y.; Shan, H. G.
刊名: ASTRONOMICAL JOURNAL
出版日期: 2017-05-01
卷号: 153, 期号:5
DOI: 10.3847/1538-3881/aa679a
学科分类: 天文学
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Chen, P. S.(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China)
关键词: infrared: stars ; stars: peculiar
英文摘要: 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
原文出处: 查看原文
ISSN号: 0004-6256
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: CHEMICALLY PECULIAR STARS ; UPPER MAIN-SEQUENCE ; SPECTROSCOPIC BINARIES ; INTRINSIC COLORS ; CP STARS ; B-STAR ; SYSTEMS ; MULTIPLICITY ; PASSBANDS ; PARAMETERS
WOS记录号: WOS:000399746700004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/10175
Appears in Collections:其他_期刊论文
中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China

Recommended Citation:
Chen PS,Liu, J. Y.,Shan, H. G.. A New Photometric Study of Ap and Am Stars in the Infrared[J]. ASTRONOMICAL JOURNAL,2017,153(5).
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