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

Justtanont, K., Muller, S., Barlow, M. J., Engels, D., García-Hernández, D. A., Groenewegen, M. A. T., Matsuura, M. ORCID: https://orcid.org/0000-0002-5529-5593, Olofsson, H., Teyssier, D., Marti-Vidal, I., Khouri, T., Van de Sande, M., Homan, W., Danilovich, T., de Koter, A., Decin, L., Waters, L. B. F. M., Stancliffe, R., Vlemmings, W., Royer, P., Kerschbaum, F., Paladini, C., Blommaert, J. and de Nutte, R. 2018. ALMA spectrum of the extreme OH/IR star OH 26.5+0.6. Proceedings of the International Astronomical Union 14 (S343) , pp. 436-437. 10.1017/S1743921318007986

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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....

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Cambridge University Press
ISSN:	1743-9213
Last Modified:	09 May 2024 16:00
URI:	https://orca.cardiff.ac.uk/id/eprint/168080

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