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Investigating the inner circumstellar envelopes of oxygen-rich evolved stars with ALMA observations of high-J SiO masers

Published online by Cambridge University Press:  07 February 2024

B. Pimpanuwat Open the ORCID record for B. Pimpanuwat [Opens in a new window] ,
A. M. S. ,
Richards Open the ORCID record for Richards [Opens in a new window] ,
M. D. ,
Gray Open the ORCID record for Gray [Opens in a new window] ,
S. ,
Etoka Open the ORCID record for Etoka [Opens in a new window] ,
L.  and
Decin
B. Pimpanuwat*
Affiliation:
Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, M13 9PL, UK.
Richards
Affiliation:
Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, M13 9PL, UK.
Gray
Affiliation:
National Astronomical Research Institute of Thailand, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand.
Etoka
Affiliation:
Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, M13 9PL, UK.
Decin
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
*
email: bpimpanuwat@gmail.com
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Abstract

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We highlight a few results from ALMA Band 6 observations of high-rotational transition number (J) SiO masers towards oxygen-rich AGB and red supergiant stars carried out as part of the ATOMIUM Large Programme in 2018–2020. A search for a relationship between mass-loss rates and flux-weighted mean angular distances of maser components was inconclusive, as linear regression models for the 28SiO v=1 J =5–4 and J =6–5 transitions were inconsistent. Supplementary APEX observations towards the ATOMIUM AGB stars also suggest variability at different stellar pulsation phases.

Keywords

MasersStars: AGB and post-AGBStars: circumstellar matterStars: mass-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. 386 - 388
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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

Assaf, K. A., Diamond, P. J., Richards, A. M. S., Gray, M. D. 2011, MNRAS, 415, 1083.10.1111/j.1365-2966.2011.18629.xCrossRefGoogle Scholar
Decin, L., Montargès, M., Richards, A. M. S., et al. 2020, Science, 369, 1497.10.1126/science.abb1229CrossRefGoogle Scholar
Doel, R. C., Gray, M. D., Humphreys, E. M. L., et al. 1995, A&A, 302, 797 Google Scholar
Gottlieb, C. A., Decin, L., Richards, A. M. S., et al. 2022, A&A, 660, A94.Google Scholar
Homan, W., Montargès, M., Pimpanuwat, B., et al. 2020, A&A, 644, A61. Google Scholar
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