On the difference between type E and type A OH/IR stars

	On the difference between type E and type A OH/IR stars
	He JH(何金华)1,2,3 ; Chen PS(陈培生)1,2,3
刊名	ASTRONOMICAL JOURNAL
	2001-05
卷号	121 期号:5 页码:2752-2757
关键词	stars : AGB and post-AGB stars : evolution stars : mass loss
ISSN号	0004-6256
通讯作者	He, JH (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	The observed spectral energy distributions of a sample of 60 OH/IR stars are fitted using a radiative transfer model of a dusty envelope. Among the whole sample, 21 stars have reliable phase-lag distances, while the others have less accurate distances. L--P, (M) over dot-P, and (M) over dot- L relations have been plotted for these stars. It is found that type E (with an emission feature at 10 mum) and type A (with an absorption feature at 10 mum) OH/IR stars have different LP and (M) over dot -L relations, while both follow a single M-P relation. The type E stars are shown to be located in an area without large-scale dense interstellar medium, while the type A stars are probably located in dense interstellar medium. It is argued here that this may indicate that the two types of OH/IR stars do not share the same chemical composition or zero-age main-sequence mass and so evolve in different ways. This conclusion has reinforced the argument by Chen et al., who reached a similar conclusion from the Galactic distribution of about 1000 OH/IR stars, based on IRAS low-resolution spectrometer spectra.
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]	OH-IR STARS ; NEAR-INFRARED PHOTOMETRY ; MASS-LOSS ; OPTICAL-PROPERTIES ; SILICATE GRAINS ; GALACTIC-CENTER ; AGB STARS ; GRAPHITE ; MASERS ; RADIO
收录类别	SCI
原文出处	http://iopscience.iop.org/1538-3881/121/5/2752/
语种	英语
WOS记录号	WOS:000168592800035
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4393]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.United Laboratory of Optical Astronomy, CAS 3.National Astronomical Observatories, China
推荐引用方式 GB/T 7714	He JH,Chen PS. On the difference between type E and type A OH/IR stars[J]. ASTRONOMICAL JOURNAL,2001,121(5):2752-2757.
APA	He JH,&Chen PS.(2001).On the difference between type E and type A OH/IR stars.ASTRONOMICAL JOURNAL,121(5),2752-2757.
MLA	He JH,et al."On the difference between type E and type A OH/IR stars".ASTRONOMICAL JOURNAL 121.5(2001):2752-2757.