Mass loss and yield uncertainty in low-mass asymptotic giant branch stars
| dc.creator | Stancliffe, Richard J. | |
| dc.creator | Jeffery, C. Simon | |
| dc.date | 2006-11-30 | |
| dc.date.accessioned | 2026-07-07T10:21:06Z | |
| dc.date.available | 2026-07-07T10:21:06Z | |
| dc.description | We investigate the uncertainty in surface abundances and yields of asymptotic giant branch (AGB) stars. We apply three different mass loss laws to a 1.5 solar mass star of metallicity Z=0.008 at the beginning of the thermally pulsing asymptotic giant branch (TP-AGB) phase. Efficient third dredge-up is found even at very low envelope mass, contrary to previous simulations with other evolution codes. We find that the yield of carbon is uncertain by about 15% and for most other light elements the yield is uncertain at the level of 20-80%. For iron group elements the uncertainty varies from around 30% for the more abundant species to over a factor of two for the less abundant radioactive species, like iron-60. The post-AGB surface abundances for this mass and metallicity are much more uncertain due to the dilution of dredged-up material in differing envelope masses in the later stages of the models. Our results are compared to known planetary nebula (PN) and post-AGB abundances. We find that the models are mostly consistent with observations but we are unable to reproduce observations of some of the isotopes. | |
| dc.description | 12 pages, 5 figures. Accepted for publication in MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0612005 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0612005 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.375:1280-1290,2007 | |
| dc.identifier | doi:10.1111/j.1365-2966.2006.11363.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175065 | |
| dc.subject | Astrophysics | |
| dc.title | Mass loss and yield uncertainty in low-mass asymptotic giant branch stars | |
| dc.type | text |