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

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

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-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 languageEnglish
Title of host publicationProceedings of Science - XII International Symposium on Nuclei in the Cosmos
EditorsJohn Lattanzio, Amanda Karakas, George Dracoulis
Place of PublicationTrieste Italy
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
Number of pages5
Publication statusPublished - 2012
EventInternational Symposium on Nuclei in the Cosmos 2012 - Cairns, Australia
Duration: 5 Aug 201212 Aug 2012
Conference number: 12th

Publication series

NameP o S - Proceedings of Science
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (Electronic)1824-8039

Conference

ConferenceInternational Symposium on Nuclei in the Cosmos 2012
Abbreviated titleNIC XII
CountryAustralia
CityCairns
Period5/08/1212/08/12
OtherXII International Symposium on Nuclei in the Cosmos

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). Trieste Italy: Scuola Internazionale Superiore di Studi Avanzati (S I S S A).
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. {\circledC} 2012 American Institute of Physics.",
author = "Heap, {Stuart Alan} and Stancliffe, {Richard James} and Lattanzio, {John Charles} and David Dearborn",
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language = "English",
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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",
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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.

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 proceedingConference PaperResearchpeer-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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PB - Scuola Internazionale Superiore di Studi Avanzati (S I S S A)

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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).