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Water masers high resolution measurements of the diverse conditions in evolved star winds

Published online by Cambridge University Press:  07 February 2024

A. M. S. Richards Open the ORCID record for A. M. S. Richards [Opens in a new window] ,
Y. Asaki ,
A. Baudry Open the ORCID record for A. Baudry [Opens in a new window] ,
J. Brand Open the ORCID record for J. Brand [Opens in a new window] ,
L. Decin ,
S. Etoka Open the ORCID record for S. Etoka [Opens in a new window] ,
M. D. Gray Open the ORCID record for M. D. Gray [Opens in a new window] ,
F. Herpin ,
R. Humphreys Open the ORCID record for R. Humphreys [Opens in a new window]  and
B. Pimpanuwat
...Show all authors
A. M. S. Richards*
Affiliation:
JBCA, Dept. Physics & Astronomy, University of Manchester, UK.
Y. Asaki
Affiliation:
JAO, Chile, NAOJ, Chile, Department of Astronomical Science, SOKENDAI, Japan
A. Baudry
Affiliation:
Université de Bordeaux, Laboratoire d’Astrophysique de Bordeaux, France
J. Brand
Affiliation:
INAF, Bologna, Italy
L. Decin
Affiliation:
Institute of Astronomy, KU Leuven, Belgium
S. Etoka
Affiliation:
JBCA, Dept. Physics & Astronomy, University of Manchester, UK.
M. D. Gray
Affiliation:
NARIT, Chiang Mai, Thailand
F. Herpin
Affiliation:
Université de Bordeaux, Laboratoire d’Astrophysique de Bordeaux, France
R. Humphreys
Affiliation:
Minnesota Institute for Astrophysics, University of Minnesota, USA
B. Pimpanuwat
Affiliation:
JBCA, Dept. Physics & Astronomy, University of Manchester, UK.
A. P. Singh
Affiliation:
Dept. of Chemistry, The University of Arizona, USA
J. A. Yates
Affiliation:
Dept. Physics & Astronomy, UCL, UK
L. M. Ziurys
Affiliation:
Dept. of Chemistry, The University of Arizona, USA
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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We compare detailed observations of multiple H2O maser transitions around the red supergiant star VY CMa with models to constrain the physical conditions in the complex outflows. The temperature profile is consistent with a variable mass loss rate but the masers are mostly concentrated in dense clumps. High-excitation lines trace localised outflows near the star.

Keywords

masersstars: massivemass loss
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 389 - 391
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re- use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

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