H2O Isotopologues in Extreme OH/IR Stars
Paper i proceeding, 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.


Kay Justtanont

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

M. J. Barlow

Jadl Blommaert

L. Decin

F. Kerschbaum

M. Matsuura

Hans Olofsson

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

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
978-1-58381-879-4 (ISBN)


Astronomi, astrofysik och kosmologi



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