Zobrazeno 1 - 10
of 245
pro vyhledávání: '"Andrassy, R."'
Autor:
Vetter, M., Roepke, F. K., Schneider, F. R. N., Pakmor, R., Ohlmann, S. T., Lau, M. Y. M., Andrassy, R.
Three-dimensional simulations usually fail to cover the entire dynamical common-envelope phase of gravitational wave progenitor systems due to the vast range of spatial and temporal scales involved. We investigated the common-envelope interactions of
Externí odkaz:
http://arxiv.org/abs/2410.07841
Performance of high-order Godunov-type methods in simulations of astrophysical low Mach number flows
Publikováno v:
A&A 686, A34 (2024)
High-order Godunov methods for gas dynamics have become a standard tool for simulating different classes of astrophysical flows. Their accuracy is mostly determined by the spatial interpolant used to reconstruct the pair of Riemann states at cell int
Externí odkaz:
http://arxiv.org/abs/2402.16706
Convection is one of the most important mixing processes in stellar interiors. Hydrodynamic mass entrainment can bring fresh fuel from neighboring stable layers into a convection zone, modifying the structure and evolution of the star. Under some con
Externí odkaz:
http://arxiv.org/abs/2309.17225
There is strong observational evidence that the convective cores of intermediate-mass and massive main sequence stars are substantially larger than those predicted by standard stellar-evolution models. However, it is unclear what physical processes c
Externí odkaz:
http://arxiv.org/abs/2307.04068
Autor:
Leidi, G., Birke, C., Andrassy, R., Higl, J., Edelmann, P. V. F., Wiest, G., Klingenberg, C., Röpke, F. K.
Publikováno v:
A&A 668, A143 (2022)
Fully compressible magnetohydrodynamic (MHD) simulations are a fundamental tool for investigating the role of dynamo amplification in the generation of magnetic fields in deep convective layers of stars. The flows that arise in such environments are
Externí odkaz:
http://arxiv.org/abs/2210.01641
Autor:
Andrassy, R., Higl, J., Mao, H., Mocák, M., Vlaykov, D. G., Arnett, W. D., Baraffe, I., Campbell, S. W., Constantino, T., Edelmann, P. V. F., Goffrey, T., Guillet, T., Herwig, F., Hirschi, R., Horst, L., Leidi, G., Meakin, C., Pratt, J., Rizzuti, F., Roepke, F. K., Woodward, P.
Publikováno v:
A&A 659, A193 (2022)
Our ability to predict the structure and evolution of stars is in part limited by complex, 3D hydrodynamic processes such as convective boundary mixing. Hydrodynamic simulations help us understand the dynamics of stellar convection and convective bou
Externí odkaz:
http://arxiv.org/abs/2111.01165
Publikováno v:
A&A 653, A55 (2021)
Context. Multidimensional hydrodynamic simulations of convection in stellar interiors are numerically challenging, especially for flows at low Mach numbers. Methods. We explore the benefits of using a low-Mach hydrodynamic flux solver and demonstrate
Externí odkaz:
http://arxiv.org/abs/2107.02199
Autor:
Edelmann, P. V. F., Horst, L., Berberich, J. P., Andrassy, R., Higl, J., Leidi, G., Klingenberg, C., Roepke, F. K.
Publikováno v:
A&A 652, A53 (2021)
Accurate simulations of flows in stellar interiors are crucial to improving our understanding of stellar structure and evolution. Because the typically slow flows are merely tiny perturbations on top of a close balance between gravity and the pressur
Externí odkaz:
http://arxiv.org/abs/2102.13111
Autor:
Horst, L., Edelmann, P. V. F., Andrassy, R., Roepke, F. K., Bowman, D. M., Aerts, C., Ratnasingam, R. P.
Publikováno v:
A&A 641, A18 (2020)
Context. Recent, nonlinear simulations of wave generation and propagation in full-star models have been carried out in the anelastic approximation using spectral methods. Although it makes long time steps possible, this approach excludes the physics
Externí odkaz:
http://arxiv.org/abs/2006.03011
We address the deficiency of odd-Z elements P, Cl, K and Sc in galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O- and C shells in massive stars. 3D hydrodynamic simulations of O-shell conve
Externí odkaz:
http://arxiv.org/abs/1704.05985