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)

Vol. 14 436-437

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1017/S1743921318007986

Mer information

Senast uppdaterat

2024-07-17