ALMA spectrum of the extreme OH/IR star OH 26.5+0.6
Paper in proceedings, 2019

We present ALMA band 7 data of the extreme OH/IR star, OH 26.5+0.6. In addition to lines of CO and its isotopologues, the circumstellar envelope also exhibits a number of emission lines due to metal-containing molecules, e.g., NaCl and KCl. A lack of C18O is expected, but a non-detection of C17O is puzzling given the strengths of H217O in Herschel spectra of the star. However, a line associated with Si17O is detected. We also report a tentative detection of a gas-phase emission line of MgS. The ALMA spectrum of this object reveals intriguing features which may be used to investigate chemical processes and dust formation during a high mass-loss phase.

stars: AGB and post-AGB

stars: individual (OH 26.5+0.6)

circumstellar matter

stars: late-type

stars: abundances

Author

Kay Justtanont

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

Sebastien Muller

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Onsala Space Observatory, Observation Support

Mike Barlow

University College London (UCL)

D. Engels

Universität Hamburg

D. A. García-Hernández

University of La Laguna

Instituto Astrofisico de Canarias

M. A. T. Groenewegen

Royal Observatory of Belgium

M. Matsuura

Cardiff University

Hans Olofsson

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

D. Teyssier

European Space Astronomy Centre (ESAC)

Ivan Marti-Vidal

Chalmers, Space, Earth and Environment, Onsala Space Observatory

Theo Khouri

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

M. Van De Sande

KU Leuven

W. Homan

KU Leuven

Taissa Danilovich

KU Leuven

A. de Koter

Sterrenkundig Instituut Anton Pannekoek

L. Decin

KU Leuven

Lbfm Waters

Sterrenkundig Instituut Anton Pannekoek

Netherlands Institute for Space Research (SRON)

R. J. Stancliffe

University of Bonn

Wouter Vlemmings

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

P. Royer

KU Leuven

F. Kerschbaum

University of Vienna

C. Paladini

European Southern Observatory Santiago

Jadl Blommaert

KU Leuven

R. De Nutte

KU Leuven

Proceedings of the International Astronomical Union

1743-9213 (ISSN) 1743-9221 (eISSN)

436-437

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.1017/S1743921318007986

More information

Latest update

3/6/2020 1