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)
436-437Subject Categories
Astronomy, Astrophysics and Cosmology
DOI
10.1017/S1743921318007986