Mass loss from an extreme OH/IR star: OH 26.5+0.6
Paper in proceeding, 2017

Observations of H 2 O isotopologues of the extreme OH/IR star OH 26.5+0.6 show that the star has an initial mass consistent with it being an intermediate-mass star. The Herschel-HIFI spectra show clear detection of H 162 O and H 172 O while H 182 O is missing, consistent with the prediction of hot bottom burning which occurs in stars with an initial mass ≥ 5 M ʘ . The star is currently losing mass at a high rate of a few 10 -4 M ʘ yr −1 which is thought to commence in the past ∼ 200 years. We present new ALMA CO J=3-2 image which show that this high mass loss (superwind) region is compact, surrounded by extended shells of lower mass loss.

Circumstellar matter

Mass-loss

Stars: evolution

Submillimeter: stars

Stars: AGB and post-AGB

Author

Kay Justtanont

Astronomy and Plasmaphysics

Other publications Research

Sebastien Muller

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Other publications Research

M. J. Barlow

University College London (UCL)

D. Engels

Hamburg Observatory

D. A. García-Hernández

University of La Laguna

Instituto de Astrofísica de Canarias

M. A. T. Groenewegen

Observatoire royal de Belgique

M. Matsuura

Cardiff University

Henrik Olofsson

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Other publications Research

D. Teyssier

European Space Astronomy Centre (ESAC)

Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society

1824016X (ISSN)

Vol. 88 3 342-345

2017 AGB-Supernovae Mass Transition
Monte Porzio Catone, Italy,

Subject Categories

Subatomic Physics

Astronomy, Astrophysics and Cosmology

Other Earth and Related Environmental Sciences

More information

Latest update

6/3/2022 9

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