ALMA spectrum of the extreme OH/IR star OH 26.5+0.6
Paper i proceeding, 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: late-type
stars: individual (OH 26.5+0.6)
circumstellar matter
stars: AGB and post-AGB
stars: abundances
Författare
Kay Justtanont
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Sebastien Muller
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
Mike Barlow
University College London (UCL)
D. Engels
Universität Hamburg
D. A. García-Hernández
Instituto de Astrofísica de Canarias
Universidad de la Laguna
M. A. T. Groenewegen
Royal Observatory of Belgium
M. Matsuura
Cardiff University
Hans Olofsson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
D. Teyssier
European Space Astronomy Centre (ESAC)
Ivan Marti-Vidal
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
Theo Khouri
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
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
Universität Bonn
Wouter Vlemmings
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
P. Royer
KU Leuven
F. Kerschbaum
Universität Wien
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)
436-437Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1017/S1743921318007986