Analysis of ISO SWS01 spectra of S stars

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	Analysis of ISO SWS01 spectra of S stars
	Yang XH(杨孝鸿)1,2,3 ; Chen PS(陈培生)1 ; Wang JC(王建成)1 ; He JH(何金华)1
刊名	ASTRONOMY & ASTROPHYSICS
	2007-02
卷号	463 期号:2 页码:663-669
关键词	stars : AGB and post AGB stars : circumstellar matter infrared : stars
ISSN号	0004-6361
通讯作者	Yang, XH (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The Infrared Space Observatory (ISO) Short-Wavelength Spectrometer (SWS01) plays an important role in studying properties of S stars. We reduce and analyze the SWS01 spectra of 17 S stars, and identify the candidate carriers of molecular absorption features. The ISO Spectral Analysis Package (ISAP) developed by the LWS and SWS Instrument Teams and Data Centers is used to process and analyze the SWS01 spectra of 17 S stars. The ISO archives of 17 S stars are obtained from the ISO database. Of 17 S stars, two stars are extrinsic S stars, the others are intrinsic S stars. The 15 intrinsic S stars can be divided into three groups (6 stars for Group I, 7 stars for Group II, and 2 stars for Group III) according to their Infrared Astronomical Satellite (IRAS) low-resolution spectra (LRS) and dust mass-loss rate. M-dust, where. M-dust increases from Group I to II and III gradually. 17 S stars show the following properties: 1. two extrinsic S stars and 15 intrinsic S stars among different groups have different infrared properties; 2. two extrinsic S stars and 6 intrinsic S stars in Group I have similar ISO SWS01 spectra and their continua can be approximately described by a single blackbody representing the stellar photosphere, while some intrinsic S stars in Group I have 60 mu m infrared excess; 3. for intrinsic S stars in Groups I, II, and III, their continua peak shifts toward longer wavelength from Groups I to II to III; 4. S stars in Groups II and III show obvious dust emission features in which the similar to 10 mu m dust features seem to display two different shapes. Moreover, two S stars (IRAS 00192-2020 & IRAS 15492 + 4837) present the 13 mu m feature; 5. molecules H2O, CO, and CO2 greatly affect the ISO SWS01 spectra of S stars. It is noted that the absorption features of molecules CS and HCN usually thought to exist only in C stars may appear in the S stars.
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]	ASYMPTOTIC GIANT BRANCH ; LOW-RESOLUTION SPECTRA ; DUST FEATURES ; MASS-LOSS ; INFRARED-SPECTRA ; STELLAR EVOLUTION ; IRAS SOURCES ; AGB STARS ; EMISSION ; OXYGEN
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2007/08/aa5048-06/aa5048-06.html
语种	英语
WOS记录号	WOS:000244069700030
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4220]
专题	云南天文台_其他
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110 Kunming, Yunnan Province 650011, PR China 2.Department of Physics, Chongqing University, Chongqing 400044, PR China 3.Graduate School of Chinese Academy of Sciences, Beijing 100049, PR China
推荐引用方式 GB/T 7714	Yang XH,Chen PS,Wang JC,et al. Analysis of ISO SWS01 spectra of S stars[J]. ASTRONOMY & ASTROPHYSICS,2007,463(2):663-669.
APA	Yang XH,Chen PS,Wang JC,&He JH.(2007).Analysis of ISO SWS01 spectra of S stars.ASTRONOMY & ASTROPHYSICS,463(2),663-669.
MLA	Yang XH,et al."Analysis of ISO SWS01 spectra of S stars".ASTRONOMY & ASTROPHYSICS 463.2(2007):663-669.