Interstellar ^36^S: a probe of s-process nucleosynthesis.
Abstract
The first detection of a ^36^S-bearing molecule in interstellar space is reported. The J=2-1 and 3-2 transition of C^36^S have been observed toward eight Galactic molecular hot cores. From a comparison with other optically thin isotopic species of CS, the abundance ratio of ^34^S/^36^S is 115(+/-17). This is smaller than the solar system ration of 200 and supports the idea that ^36^S is, unlike the other stable sulfur isotopes, a purely secondary nucleus that is produced by s-process nucleosynthesis in massive stars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1996
- DOI:
- 10.48550/arXiv.astro-ph/9607071
- arXiv:
- arXiv:astro-ph/9607071
- Bibcode:
- 1996A&A...313L...1M
- Keywords:
-
- NUCLEAR REACTIONS;
- NUCLEOSYNTHESIS;
- ABUNDANCES;
- ISM: ABUNDANCES;
- ISM: MOLECULES;
- GALAXY: ABUNDANCES;
- Astrophysics
- E-Print:
- 4 pages uuencoded gzip-compressed .tar file including two figures, To appear in A&