|
other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2000A&A...361L...1P - Astronomy and Astrophysics, volume 361, L1-4 (2000/9-1)
Third-dredge-up oxygen in planetary nebulae.
PEQUIGNOT D., WALSH J.R., ZIJLSTRA A.A. and DUDZIAK G.
Abstract (from CDS):
The planetary nebulae He2-436 and Wray16-423 in the Sagittarius dwarf galaxy appear to result from nearly twin stars, except that third-dredge-up carbon is more abundant in He2-436. A thorough photoionization-model analysis implies that ratios Ne/O, S/O and Ar/O are significantly smaller in He2-436, indicative of third-dredge-up oxygen enrichment. The enrichment of oxygen with respect to carbon is (7±4)%. Excess nitrogen in Wray 16-423 suggests third dredge-up of late-CN-cycle products even in these low-mass, intermediate-metallicity stars.
Abstract Copyright: ∼
Journal keyword(s): nuclear reactions, nucleosynthesis, abundances - ISM: planetary nebulae: general - ISM: planetary nebulae: general - ISM: planetary nebulae: general - galaxies: dwarf - galaxies: individual: Sagittarius
Simbad objects: 5
To bookmark this query, right click on this link: simbad:2000A&A...361L...1P and select 'bookmark this link' or equivalent in the popup menu