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(Sub)mm Observations of Evolved Stars

Published online by Cambridge University Press:  07 February 2024

Elizabeth Humphreys Open the ORCID record for Elizabeth Humphreys [Opens in a new window] ,
Suzanna Randall ,
Yoshiharu Asaki  and
Per Bergman
Elizabeth Humphreys*
Affiliation:
European Southern Observatory (ESO) Vitacura, Alonso de Cordova 3107, Vitacura, Santiago, Chile. Joint ALMA Observatory (JAO), Alonso de Cordova 3107, Vitacura, Santiago, Chile
Suzanna Randall
Affiliation:
ESO Headquarters, Karl-Schwarzschild-Strasse 2, Garching, Germany
Yoshiharu Asaki
Affiliation:
Joint ALMA Observatory (JAO), Alonso de Cordova 3107, Vitacura, Santiago, Chile National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan
Per Bergman
Affiliation:
Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 43992 Onsala, Sweden
*
email: elizabeth.humphreys@alma.cl
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Abstract

Evolved stars on the asymptotic giant branch and red supergiants have multiple processes that can be studied in the (sub)mm, including stellar surfaces, circumstellar thermal gas and dust, and masers. Telescopes such as APEX and ALMA have opened the possibility to perform studies that are revealing new information on these, as well as on the role of binaries in shaping stellar winds and the evolution to planetary nebulae. Here, we discuss some recent results for (sub)mm observations towards evolved stars focusing particularly on masers. This includes SiO and water masers, as well as ALMA high angular resolution observations of HCN masers towards a carbon-rich star.

Keywords

Masersstars: AGB and post-AGBsubmillimeter
Type
Contributed 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. 309 - 313
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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