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

Author(s): 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
Abstract: 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(s): Department of Astrophysics
External organisation(s): Chalmers University of Technology, University College London, Universität Hamburg, Institute of Astrophysics of the Canary Islands, University of 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
Volume: 14
Pages: 436-437
No. of pages: 2
DOI: https://doi.org/10.1017/S1743921318007986
Publication date: 12-2019
Austrian Fields of Science 2012: 103003 Astronomy, 103004 Astrophysics
Keywords
ASJC Scopus subject areas: Astronomy and Astrophysics, Space and Planetary Science
Portal url: https://ucrisportal.univie.ac.at/en/publications/275da663-f224-4db7-82f5-f3de6ca579dc

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