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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)
Source PublicationASTRONOMICAL JOURNAL
2017-05-01
Volume153Issue:5Pages:218-247
DOI10.3847/1538-3881/aa679a
Contribution Rank第1完成单位
Indexed BySCI
KeywordInfrared: Stars Stars: Peculiar
Abstract

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.

Funding ProjectNational Nature Science Foundation of China[11373067] ; National Nature Science Foundation of China[11303086]
Funding OrganizationNational Nature Science Foundation of China[11373067, 11303086]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 空间天文学 ; 红外天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
Archive Date2017-05-19
WOS IDWOS:000399746700004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCHEMICALLY PECULIAR STARS ; UPPER MAIN-SEQUENCE ; SPECTROSCOPIC BINARIES ; INTRINSIC COLORS ; CP STARS ; B-STAR ; SYSTEMS ; MULTIPLICITY ; PASSBANDS ; PARAMETERS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10175
Collection其他
中国科学院天体结构与演化重点实验室
Corresponding AuthorChen PS(陈培生)
AffiliationYunnan Observatories and Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
Recommended Citation
GB/T 7714
Chen PS,Liu JY,Dan HG. 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.(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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