A well-balanced scheme for the simulation tool-kit A-MaZe: implementation, tests, and first applications to stellar structure

Autor: Maxime Viallet, Rolf Walder, Roger Käppeli, M. V. Popov, Jane Pratt, C. Geroux, T. Constantino, T. Goffrey, Doris Folini, Isabelle Baraffe

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2019, 630, ⟨10.1051/0004-6361/201834180⟩
Astronomy & Astrophysics, 630
Astronomy & Astrophysics

Characterizing stellar convection in multiple dimensions is a topic at the forefront of stellar astrophysics. Numerical simulations are an essential tool for this task. We present an extension of the existing numerical tool-kit A-MaZe that enables su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6900c63174b4346ff15ffd560156054f
https://hal-insu.archives-ouvertes.fr/insu-03711415

Extreme value statistics for two-dimensional convective penetration in a pre-Main Sequence star

Autor: Maxime Viallet, Jane Pratt, Rolf Walder, T. Constantino, M. V. Popov, Isabelle Baraffe, Doris Folini, T. Goffrey

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 604, pp.A125. ⟨10.1051/0004-6361/201630362⟩
Astron.Astrophys.
Astron.Astrophys., 2017, 604, pp.A125. 〈10.1051/0004-6361/201630362〉
Astron.Astrophys., 2017, 604, pp.A125. ⟨10.1051/0004-6361/201630362⟩
Astronomy and Astrophysics-A&A, 2017, 604, pp.A125. ⟨10.1051/0004-6361/201630362⟩

We examine a penetration layer formed between a central radiative zone and a large convection zone in the deep interior of a young low-mass star. Using the Multidimensional Stellar Implicit Code (MUSIC) to simulate two-dimensional compressible stella

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a6217a1343c82a02cebfa247a7cb9a4
https://hal.archives-ouvertes.fr/hal-01645360

3D Simulations and MLT. I. Renzini’s Critique

Autor: Maxime Viallet, David Arnett, Etienne A. Kaiser, Cyril Georgy, Simon Campbell, Miroslav Mocák, Laura J. A. Scott, Raphael Hirschi, Casey Meakin, Andrea Cristini

Publikováno v: The Astrophysical Journal. 882:18

Renzini wrote an influential critique of “overshooting” in mixing-length theory (MLT), as used in stellar evolution codes, and concluded that three-dimensional fluid dynamical simulations were needed. Such simulations are now well tested. Implici

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7720d7e9c551e4340cd042711cfce238
https://doi.org/10.3847/1538-4357/ab21d9

On the relevance of bubbles and potential flows for stellar convection

Autor: Achim Weiss, Wasilij Barsukow, M. M. Miller Bertolami, Vincent Prat, Maxime Viallet

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

Recently Pasetto et al. have proposed a new method to derive a convection theory appropriate for the implementation in stellar evolution codes. Their approach is based on the simple physical picture of spherical bubbles moving within a potential flow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8599d5d0f7a4b20ad19bbdb166e6aca4
http://fcaglp.fcaglp.unlp.edu.ar/evolgroup/Papers/ARTICLES/2016/MNRAS_2016_Miller_Bertolami_4441_53.pdf

Multi-dimensional structure of accreting young stars

Autor: Jane Pratt, Rolf Walder, T. Goffrey, M. V. Popov, Maxime Viallet, Doris Folini, C. Geroux, Isabelle Baraffe, T. Constantino

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2016, 588, ⟨10.1051/0004-6361/201528038⟩

This work is the first attempt to describe the multi-dimensional structure of accreting young stars based on fully compressible time implicit multi-dimensional hydrodynamics simulations. One major motivation is to analyse the validity of accretion tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa31f30b7077f1309d13eb0cfbb33e6e