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PION: Simulations of Wind-Blown Nebulae

Published online by Cambridge University Press:  20 January 2023

Jonathan Mackey
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland DIAS Dunsink Observatory, Dunsink Lane, D15 XR2R, Ireland
Samuel Green
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland DIAS Dunsink Observatory, Dunsink Lane, D15 XR2R, Ireland
Maria Moutzouri
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland DIAS Dunsink Observatory, Dunsink Lane, D15 XR2R, Ireland
Thomas J. Haworth
Affiliation:
Astronomy Unit, School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
Robert D. Kavanagh
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Maggie Celeste
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland School of Physics, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
Robert Brose
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland DIAS Dunsink Observatory, Dunsink Lane, D15 XR2R, Ireland
Davit Zargaryan
Affiliation:
Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland DIAS Dunsink Observatory, Dunsink Lane, D15 XR2R, Ireland
Ciarán O’Rourke
Affiliation:
Irish Centre for High-End Computing (ICHEC), NUI Galway, Galway City, Ireland
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Abstract

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We present an overview of PION, an open-source software project for solving radiation-magnetohydrodynamics equations on a nested grid, aimed at modelling asymmetric nebulae around massive stars. A new implementation of hybrid OpenMP/MPI parallel algorithms is briefly introduced, and improved scaling is demonstrated compared with the current release version. Three-dimensional simulations of an expanding nebula around a Wolf-Rayet star are then presented and analysed, similar to previous 2D simulations in the literature. The evolution of the emission measure of the gas and the X-ray surface brightness are calculated as a function of time, and some qualitative comparison with observations is made.

Type
Contributed Paper
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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