Justtanont, K;
Müller, S;
Barlow, MJ;
Engels, D;
García-Hernández, DA;
Groenewegen, M;
Matsuura, M;
... Teyssier, D; + view all
(2017)
Mass loss from an extreme OH/IR star: OH 26.5+0.6.
In:
Journal of the Italian Astronomical Society.
(pp. pp. 342-345).
Memorie della Società Astronomica Italiana
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Abstract
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 HerschelHIFI spectra show clear detection of H_{2}^{16}O and H_{2}^{17}O while H_{2}^{18}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.
| Type: | Proceedings paper |
|---|---|
| Title: | Mass loss from an extreme OH/IR star: OH 26.5+0.6 |
| Event: | The AGB-Supernovae mass transition |
| Location: | Monte Porzio Catone, Italy |
| Dates: | 27th-31th March 2017 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://sait.oat.ts.astro.it/MSAIt880317/index.html |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisherís terms and conditions. |
| Keywords: | Stars: AGB and post, AGB, Stars: evolution, mass-loss, Circumstellar matter, Submillimeter: stars |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10093808 |
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