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H2O Isotopologues in Extreme OH/IR Stars

Justtanont, K; Barlow, MJ; Blommaert, JADL; Decin, L; Kerschbaum, F; Matsuura, M; Olofsson, H; ... Yates, J; + view all (2015) H2O Isotopologues in Extreme OH/IR Stars. In: Kerschbaum, F and Wing, RF and Hron, J, (eds.) Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time. (pp. pp. 85-89). Astronomical Society of the Pacific Conference Series Green open access

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Abstract

Using Herschel Space Observatory, we observed isotopologues of H2O in extreme OH/IR stars. We detected strong H216O and H217O while the H218O lines are missing, contrary to the overall galactic oxygen abundance in the interstellar medium and the Sun, where 18O is more abundant than 17O. Theoretical stellar evolution suggests that 18O is being destroyed during the hot-bottom burning. This implies that these OH/IR stars come from a population of intermediate-mass stars which have an initial mass ≥ 5 M☉.

Type: Proceedings paper
Title: H2O Isotopologues in Extreme OH/IR Stars
Event: Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time
Location: Univ Vienna, Vienna, AUSTRIA
Dates: 28 July 2014 - 01 August 2014
ISBN-13: 978-1-58381-878-7
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.aspbooks.org/a/volumes/article_details?...
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
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 Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
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/10113582
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