Boron Abundances in Orion and Boron Production in Type II Supernovae
Abstract
The Orion OB1 association comprises four subgroups of differing ages. The youngest stars show higher oxygen abundances than the oldest stars. This enrichment has been shown to be due to contamination of the natal gas by oxygen- rich ejecta from supernovae. The boron abundance will be derived from the B II 1362 Angstrom line for three stars in the Orion OB1 association having different oxygen abundances. A positive correlation of the boron and oxygen abundance will, if present, indicate that boron, as ^11B, is synthesized by the supernovae held responsible for the oxygen abundances. This will be the first direct evidence for ^11B production by supernovae.
- Publication:
-
HST Proposal
- Pub Date:
- July 1995
- Bibcode:
- 1995hst..prop.6077L