A new approach to the infrared photometric study of Be stars

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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)
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-12-01
卷号	463 期号:2 页码:1162-1172
关键词	Infrared: Stars Stars: Be star
ISSN号	0035-8711
通讯作者	Chen, PS (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GALACTIC FSCMA STARS ; EMISSION-LINE STARS ; CIRCUMSTELLAR ENVIRONMENT ; IRAS OBSERVATIONS ; BE-STARS ; SPECTRA ; CATALOG ; EXCESS ; DISKS ; SAGITTARII
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/463/2/1162
语种	英语
WOS记录号	WOS:000388122400004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9773]
专题	云南天文台_其他云南天文台_中国科学院天体结构与演化重点实验室
作者单位	Yunnan Observatories and Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 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.