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

Truong-Bach; Nguyen-Q-Rieu; Sylvester, RJ; Barlow, MJ; Liu, XW; Lim, T; Omont, A; ... Skinner, CJ; + view all (1998) ISO LWS observations of H2O from R Cas: A consistent model for its circumstellar envelope. Astrophysics and Space Science , 255 pp. 325-328. 10.1023/A:1001539824590. Green open access

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Abstract

We present an ISO LWS 43-197 µm grating spectrum of the oxygen-rich AGB star R Cas. 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 = 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 AGB star.

Type: Article
Title: ISO LWS observations of H2O from R Cas: A consistent model for its circumstellar envelope
Location: NOORDWIJKERHOUT, NETHERLANDS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1023/A:1001539824590
Publisher version: https://doi.org/10.1023/A:1001539824590
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Astronomy & Astrophysics, WATER, STARS, RATES, CO
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10113223
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