Abstract
We have modelled a dual shell flash (DSF) in a low-metallicity 1.5M ⊙ AGB star using the 3-dimensional hydrodynamic program "Djehuty", observing how the evolution of these events compares to 1-dimensional models, which are hypothesised to be inaccurate due to the simplifications in the treatment of convective processes. In particular, the stability of the separated convective structure following hydrogen ignition is investigated. In both models constructed, the split convective zone structure was found to be unstable, with the velocities within the inner convective zone increasing until material breaks through the gap and recombines the two regions into a large single convective region. © 2012 American Institute of Physics.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of Science - XII International Symposium on Nuclei in the Cosmos |
| Editors | John Lattanzio, Amanda Karakas, George Dracoulis |
| Place of Publication | Trieste Italy |
| Publisher | Scuola Internazionale Superiore di Studi Avanzati (S I S S A) |
| Number of pages | 5 |
| Publication status | Published - 2012 |
| Event | International Symposium on Nuclei in the Cosmos 2012 - Cairns, Australia Duration: 5 Aug 2012 → 12 Aug 2012 Conference number: 12th |
Publication series
| Name | P o S - Proceedings of Science |
|---|---|
| Publisher | Scuola Internazionale Superiore di Studi Avanzati (S I S S A) |
| ISSN (Electronic) | 1824-8039 |
Conference
| Conference | International Symposium on Nuclei in the Cosmos 2012 |
|---|---|
| Abbreviated title | NIC XII |
| Country | Australia |
| City | Cairns |
| Period | 5/08/12 → 12/08/12 |
| Other | XII International Symposium on Nuclei in the Cosmos |
Cite this
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Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars. / Heap, Stuart Alan; Stancliffe, Richard James; Lattanzio, John Charles; Dearborn, David.
Proceedings of Science - XII International Symposium on Nuclei in the Cosmos. ed. / John Lattanzio; Amanda Karakas; George Dracoulis. Trieste Italy : Scuola Internazionale Superiore di Studi Avanzati (S I S S A), 2012. 194 (P o S - Proceedings of Science).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review
TY - GEN
T1 - Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars
AU - Heap, Stuart Alan
AU - Stancliffe, Richard James
AU - Lattanzio, John Charles
AU - Dearborn, David
PY - 2012
Y1 - 2012
N2 - We have modelled a dual shell flash (DSF) in a low-metallicity 1.5M ⊙ AGB star using the 3-dimensional hydrodynamic program "Djehuty", observing how the evolution of these events compares to 1-dimensional models, which are hypothesised to be inaccurate due to the simplifications in the treatment of convective processes. In particular, the stability of the separated convective structure following hydrogen ignition is investigated. In both models constructed, the split convective zone structure was found to be unstable, with the velocities within the inner convective zone increasing until material breaks through the gap and recombines the two regions into a large single convective region. © 2012 American Institute of Physics.
AB - We have modelled a dual shell flash (DSF) in a low-metallicity 1.5M ⊙ AGB star using the 3-dimensional hydrodynamic program "Djehuty", observing how the evolution of these events compares to 1-dimensional models, which are hypothesised to be inaccurate due to the simplifications in the treatment of convective processes. In particular, the stability of the separated convective structure following hydrogen ignition is investigated. In both models constructed, the split convective zone structure was found to be unstable, with the velocities within the inner convective zone increasing until material breaks through the gap and recombines the two regions into a large single convective region. © 2012 American Institute of Physics.
UR - http://www.scopus.com/inward/record.url?scp=84887495194&partnerID=8YFLogxK
M3 - Conference Paper
T3 - P o S - Proceedings of Science
BT - Proceedings of Science - XII International Symposium on Nuclei in the Cosmos
A2 - Lattanzio, John
A2 - Karakas, Amanda
A2 - Dracoulis, George
PB - Scuola Internazionale Superiore di Studi Avanzati (S I S S A)
CY - Trieste Italy
ER -