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

Visa alla personer

Publicerad i

Proceedings of the International Astronomical Union

1743-9213 (ISSN) 1743-9221 (eISSN)

Vol. 14 s. 436-437

Kategorisering

Ämneskategorier (SSIF 2011)

Astronomi, astrofysik och kosmologi

Identifikatorer

DOI

10.1017/S1743921318007986

Mer information

Senast uppdaterat

2024-07-17