ISO LWS observations of H2O from R Cas:: A consistent model for its circumstellar envelope

被引：0

作者：

Truong-Bach

Nguyen-Q-Rieu

Sylvester, RJ

Barlow, MJ

Liu, XW

Lim, T

Omont, A

Cox, P

Skinner, CJ

机构：

[1] Observ Paris, DEMIRM, F-75014 Paris, France

[2] Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England

[3] ISO Sci Operat Ctr, LWS Instrument Dedicated Team, E-28080 Madrid, Spain

[4] Inst Astrophys, F-75014 Paris, France

[5] Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France

[6] Space Telescope Sci Inst, Baltimore, MD 21218 USA

来源：

ASTROPHYSICS AND SPACE SCIENCE | 1998年 / 255卷 / 1-2期

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an ISO LWS 43-197 mu m grating spectrum of the oxygen-rich AGE star R Gas. The spectrum is rich of isolated and blended H2O lines. For their identification and in order to determine the physical parameters of the circumstellar envelope, we have constructed a model which treats radiative transfer, chemical exchange and photodissociation reactions, and various heating and cooling processes in a consistent manner. By fitting the observed line fluxes and using stellar parameters based upon the Hipparcos distance, we derived a mass-loss rate of (M) over dot = 1 10(-6) M. yr(-1) which is close to the value 6 10(-7) M. yr(-1) previously derived for W Hya, another oxygen-rich AGE star.

引用

页码：325 / 328

页数：4

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