M 1-92 revisited: the chemistry of a common envelope nebula?
Abstract
We report on new molecular-line observations of the bipolar pre-planetary nebula M 1-92. The new IRAM 30 m MRT and NOEMA data shows the presence of shock induced chemistry in the nebula. From the derived [17O]/[18O] ratio, we suggest that the sudden mass loss event responsible for the formation of the nebula 1200 yr ago may also have resulted in the premature end of the AGB phase of the central star.
- Publication:
-
Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time
- Pub Date:
- December 2019
- DOI:
- Bibcode:
- 2019IAUS..343..343A
- Keywords:
-
- stars: AGB and post-AGB;
- stars: evolution;
- stars: individual (M 1-92)