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A new approach to the infrared photometric study of Be stars
Chen PS(陈培生); Liu JY(刘杰英); Dan HG(单红光)
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-12-01
Volume463Issue:2Pages:1162-1172
DOI10.1093/mnras/stw1757
Contribution Rank第1完成单位
Indexed BySCI
KeywordInfrared: Stars Stars: Be Star
Abstract

In this paper, we have collected data for almost all Be stars known so far (1991 sources in total) and photometrically study their infrared properties. 2MASS, WISE, IRAS and Akari data are analysed. It is shown from several two-colour diagrams that from 1 to 60 mu m, infrared excesses for the majority of Be stars are mainly due to the free-free emission or the bound-free emission from proton-electron scattering, while for only a small number of Be stars their infrared excess originates from dust thermal radiation or is caused by the nebulosity/binarity effects. However, in the wavelength range 3.4-12 mu m (the WISE W1, W2 and W3 bands), some Be stars show the properties of dust thermal radiation, which is probably due to silicate dust emission and/or polycyclic aromatic hydrocarbon emission. In addition, it is found in this paper that infrared colour excesses indeed increase with wavelength for Be stars. However, no correlations between infrared colours and spectral type can be found for Be stars. Furthermore, several stars have very large infrared excesses in the near-infrared. The reasons for such infrared excesses are given in more detail.

Funding ProjectNational Nature Science Foundation of China (NNSFC)[11373067] ; National Nature Science Foundation of China (NNSFC)[11303086]
Funding OrganizationNational Nature Science Foundation of China (NNSFC)[11373067, 11303086]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
Archive Date2016-12-19
WOS IDWOS:000388122400004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGALACTIC FSCMA STARS ; EMISSION-LINE STARS ; CIRCUMSTELLAR ENVIRONMENT ; IRAS OBSERVATIONS ; BE-STARS ; SPECTRA ; CATALOG ; EXCESS ; DISKS ; SAGITTARII
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9773
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 approach to the infrared photometric study of Be stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(2):1162-1172.
APA Chen PS,Liu JY,&Dan HG.(2016).A new approach to the infrared photometric study of Be stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(2),1162-1172.
MLA Chen PS,et al."A new approach to the infrared photometric study of Be stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.2(2016):1162-1172.
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