ALMA spectrum of the extreme OH/IR star OH 26.5+0.6

Autor(en)

K. Justtanont, S. Muller, M. J. Barlow, D. Engels, D. A. García-Hernández, M. A. T. Groenewegen, M. Matsuura, H. Olofsson, D. Teyssier, I. Marti-Vidal, T. Khouri, M. Van de Sande, W. Homan, T. Danilovich, A. de Koter, L. Decin, L. B. F. M. Waters, R. Stancliffe, W. Vlemmings, P. Royer, F. Kerschbaum, C. Paladini, J. Blommaert, R. de Nutte

Abstrakt

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.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Chalmers University of Technology, University College London, Universität Hamburg, Instituto de Astrofísica de Canarias (IAC), Universidad de La Laguna, Royal Observatory of Belgium, Cardiff University, European Space Astronomy Centre (ESA), Katholieke Universiteit Leuven, Sterrenkundig Instituut "Anton Pannekoek", SRON Netherlands Institute for Space Research , Rheinische Friedrich-Wilhelms-Universität Bonn, European Southern Observatory (Chile)

Journal

Proceedings of the International Astronomical Union

Band

14

Seiten

436-437

Anzahl der Seiten

2

DOI

https://doi.org/10.1017/S1743921318007986

Publikationsdatum

12-2019

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/275da663-f224-4db7-82f5-f3de6ca579dc