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

Bibcode
2019IAUS..343..436J
DOI
10.1017/S1743921318007986
Justtanont, K.; Muller, S.; Barlow, M. J.; Engels, D.; García-Hernández, D. A.; Groenewegen, M. A. T.; Matsuura, M.; 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.; de Nutte, R.
Referencia bibliográfica

IAU Symposium

Fecha de publicación:
12
2019
Número de autores
24
Número de autores del IAC
1
Número de citas
1
Número de citas referidas
1
Descripción
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.
Tipo
Sin árbitro
Materia circunestelar

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