H2O Isotopologues in Extreme OH/IR Stars
Paper in proceedings, 2015

Using Herschel Space Observatory we we observed isotopologues of H2O in extreme OH/IR stars. We detected strong (H2O)-O-16 and (H2O)-O-17 while the (H2O)-O-18 lines are missing, contrary to the overall galactic oxygen abundance in the interstellar medium and the Sun, where O-18 is more abundant than O-17. Theoretical stellar evolution suggests that O-18 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-circle dot.

Author

Kay Justtanont

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

M. J. Barlow

Jadl Blommaert

L. Decin

F. Kerschbaum

M. Matsuura

Hans Olofsson

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

B. Swinyard

D. Teyssier

Lbfm Waters

J. A. Yates

Astronomical Society of the Pacific Conference Series: Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna, Austria, JUL 28-AUG 01, 2014

Vol. 497 85-89

Subject Categories

Astronomy, Astrophysics and Cosmology

ISBN

978-1-58381-879-4

More information

Created

10/7/2017