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

B. Pimpanuwat; A. M. S. Richards; M. D. Gray; S. Etoka; L. Decin

doi:10.1017/S1743921323002235

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

B. Pimpanuwat, A. M. S. Richards, M. D. Gray, S. Etoka, L. Decin

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	386-388
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	18
Issue number	S380
DOIs	https://doi.org/10.1017/S1743921323002235
Publication status	Published - 7 Feb 2024

Keywords

Masers
Stars: AGB and post-AGB
Stars: circumstellar matter
Stars: mass-loss

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10.1017/S1743921323002235Licence: CC BY

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

abstract = "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 = "Masers, Stars: AGB and post-AGB, Stars: circumstellar matter, Stars: mass-loss",

author = "B. Pimpanuwat and Richards, {A. M. S.} and Gray, {M. D.} and S. Etoka and L. Decin",

year = "2024",

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language = "English",

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journal = "Proceedings of the International Astronomical Union",

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TY - JOUR

T1 - Investigating the inner circumstellar envelopes of oxygen-rich evolved stars with ALMA observations of high-J SiO masers

AU - Pimpanuwat, B.

AU - Richards, A. M. S.

AU - Gray, M. D.

AU - Etoka, S.

AU - Decin, L.

PY - 2024/2/7

Y1 - 2024/2/7

N2 - 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.

AB - 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.

KW - Masers

KW - Stars: AGB and post-AGB

KW - Stars: circumstellar matter

KW - Stars: mass-loss

U2 - 10.1017/S1743921323002235

DO - 10.1017/S1743921323002235

M3 - Article

SN - 1743-9213

VL - 18

SP - 386

EP - 388

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S380

ER -

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

Abstract

Keywords

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