Impact of radial truncation on global 2D hydrodynamic simulations for a Sun-like model
dc.contributor.author | Vlaykov, DG | |
dc.contributor.author | Baraffe, I | |
dc.contributor.author | Constantino, T | |
dc.contributor.author | Goffrey, T | |
dc.contributor.author | Guillet, T | |
dc.contributor.author | Le Saux, A | |
dc.contributor.author | Morison, A | |
dc.contributor.author | Pratt, J | |
dc.date.accessioned | 2022-07-22T09:08:08Z | |
dc.date.issued | 2022-05-10 | |
dc.date.updated | 2022-07-21T10:47:44Z | |
dc.description.abstract | Stellar convection is a non-local process responsible for the transport of heat and chemical species. It can lead to enhanced mixing through convective overshooting and excitation of internal gravity waves (IGWs) at convective boundaries. The relationship between these processes is still not well understood and requires global hydrodynamic simulations to capture the important large-scale dynamics. The steep stratification in stellar interiors suggests that the radial extent of such simulations can affect the convection dynamics, the IGWs in the stably stratified radiative zone, and the depth of the overshooting layer. We investigate these effects using 2D global simulations performed with the fully compressible stellar hydrodynamics code MUSIC. We compare eight different radial truncations of the same solar-like stellar model evolved over approximately 400 convective turnover times. We find that the location of the inner boundary has an insignificant effect on the convection dynamics, the convective overshooting, and the travelling IGWs. We relate this to the background conditions at the lower convective boundary which are unaffected by the truncation, as long as a significantly deep radiative layer is included in the simulation domain. However, we find that extending the outer boundary by only a few per cent of the stellar radius significantly increases the velocity and temperature perturbations in the convection zone, the overshooting depth, the power and the spectral slope of the IGWs. The effect is related to the background conditions at the outer boundary, which are determined in essence by the hydrostatic stratification and the given luminosity. | en_GB |
dc.description.sponsorship | European Research Council (ERC) | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.identifier.citation | Vol. 514, No. 1, pp. 715-727 | en_GB |
dc.identifier.doi | https://doi.org/10.1093/mnras/stac1278 | |
dc.identifier.grantnumber | 787361-COBOM | en_GB |
dc.identifier.grantnumber | ST/R000395/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/130337 | |
dc.identifier | ORCID: 0000-0002-1402-9125 (Vlaykov, DG) | |
dc.identifier | ORCID: 0000-0001-8365-5982 (Baraffe, I) | |
dc.identifier | ORCID: 0000-0002-0271-5953 (Guillet, T) | |
dc.language.iso | en | en_GB |
dc.publisher | Oxford University Press / Royal Astronomical Society | en_GB |
dc.rights | © 2022 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. | en_GB |
dc.subject | convection | en_GB |
dc.subject | hydrodynamics | en_GB |
dc.subject | stars: interiors | en_GB |
dc.subject | stars: solar-type | en_GB |
dc.title | Impact of radial truncation on global 2D hydrodynamic simulations for a Sun-like model | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2022-07-22T09:08:08Z | |
dc.identifier.issn | 0035-8711 | |
dc.description | This is the final version. Available on open access from Oxford University Press via the DOI in this record. | en_GB |
dc.description | Data availability: The data underlying this article will be shared on reasonable request to the corresponding author. | en_GB |
dc.identifier.eissn | 1365-2966 | |
dc.identifier.journal | Monthly Notices of the Royal Astronomical Society | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2022-04-29 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2022-05-10 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2022-07-22T09:05:03Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2022-07-22T09:08:13Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2022-05-10 |
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Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.