Circumstellar H2O in M-type AGB stars
Other conference contribution, 2008
Surprisingly high amounts of H2O have recently been reported in the circumstellar envelope around the M-type AGB star W Hya. However, substantial uncertainties remain, as the required radiative transfer modelling is difficult due to high optical depths, sub-thermal excitation and the sensitivity to the combined radiation field from the central star and dust grains.
Author
Matthias Maercker
Fredrik Schöier
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
Hans Olofsson
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
in Proceedings of "Organic Matter in Space", Hong Kong, Feb 18-22, 2008, IAU symposium 251, eds. S. Kwok, S. Sandford, Cambridge University Press
163-164
9780521889827 (ISBN)
Subject Categories
Astronomy, Astrophysics and Cosmology
ISBN
9780521889827