Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars

Stuart Alan Heap; Richard James Stancliffe; John Charles Lattanzio; David Dearborn

Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars

Stuart Alan Heap, Richard James Stancliffe, John Charles Lattanzio, David Dearborn

School of Mathematics

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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

Access to Document

2707373-oaFinal published version, 1.46 MB

Cite this

Heap, S. A., Stancliffe, R. J., Lattanzio, J. C., & Dearborn, D. (2012). Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars. In J. Lattanzio, A. Karakas, & G. Dracoulis (Eds.), Proceedings of Science - XII International Symposium on Nuclei in the Cosmos [194] (P o S - Proceedings of Science). Scuola Internazionale Superiore di Studi Avanzati (S I S S A). https://pos.sissa.it/146/194/pdf

Heap, Stuart Alan ; Stancliffe, Richard James ; Lattanzio, John Charles ; Dearborn, David. / Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars. Proceedings of Science - XII International Symposium on Nuclei in the Cosmos. editor / John Lattanzio ; Amanda Karakas ; George Dracoulis. Trieste Italy : Scuola Internazionale Superiore di Studi Avanzati (S I S S A), 2012. (P o S - Proceedings of Science).

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title = "Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars",

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. {\textcopyright} 2012 American Institute of Physics.",

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year = "2012",

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publisher = "Scuola Internazionale Superiore di Studi Avanzati (S I S S A)",

editor = "John Lattanzio and Amanda Karakas and George Dracoulis",

booktitle = "Proceedings of Science - XII International Symposium on Nuclei in the Cosmos",

note = "International Symposium on Nuclei in the Cosmos 2012, NIC XII ; Conference date: 05-08-2012 Through 12-08-2012",

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Heap, SA, Stancliffe, RJ, Lattanzio, JC & Dearborn, D 2012, Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars. in J Lattanzio, A Karakas & G Dracoulis (eds), Proceedings of Science - XII International Symposium on Nuclei in the Cosmos., 194, P o S - Proceedings of Science, Scuola Internazionale Superiore di Studi Avanzati (S I S S A), Trieste Italy, International Symposium on Nuclei in the Cosmos 2012, Cairns, Australia, 5/08/12. <https://pos.sissa.it/146/194/pdf>

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

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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.

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Heap SA, Stancliffe RJ, Lattanzio JC, Dearborn D. Three-Dimensional Modelling of Proton Ingestion Episodes in Low-Mass Stars. In Lattanzio J, Karakas A, Dracoulis G, editors, Proceedings of Science - XII International Symposium on Nuclei in the Cosmos. Trieste Italy: Scuola Internazionale Superiore di Studi Avanzati (S I S S A). 2012. 194. (P o S - Proceedings of Science).