Zobrazeno 1 - 10
of 178
pro vyhledávání: '"VIALLET, M."'
We present the first detailed 3D hydrodynamic implicit large eddy simulations of turbulent convection of carbon burning in massive stars. Simulations begin with radial profiles mapped from a carbon-burning shell within a 15M circle dot 1D stellar evo
Externí odkaz:
http://hdl.handle.net/10150/625735
http://arizona.openrepository.com/arizona/handle/10150/625735
http://arizona.openrepository.com/arizona/handle/10150/625735
Autor:
Popov, M. V., Walder, R., Folini, D., Goffrey, T., Baraffe, I., Constantino, T., Geroux, C., Pratt, J., Viallet, M.
Publikováno v:
A&A 630, A129 (2019)
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:
http://arxiv.org/abs/1909.02428
Autor:
Baraffe, I., Pratt, J., Goffrey, T., Constantino, T., Folini, D., Popov, M. V., Walder, R., Viallet, M.
We study lithium depletion in low-mass and solar-like stars as a function of time, using a new diffusion coefficient describing extra-mixing taking place at the bottom of a convective envelope. This new form is motivated by multi-dimensional fully co
Externí odkaz:
http://arxiv.org/abs/1707.09498
Autor:
Pratt, J., Baraffe, I., Goffrey, T., Constantino, T., Viallet, M., Popov, M. V., Walder, R., Folini, D.
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:
http://arxiv.org/abs/1706.04852
Autor:
Goffrey, T., Pratt, J., Viallet, M., Baraffe, I., Popov, M. V., Walder, R., Folini, D., Geroux, C., Constantino, T.
We present the results of a numerical benchmark study for the MUlti-dimensional Stellar Implicit Code (MUSIC) based on widely applicable two- and three-dimensional compressible hydrodynamics problems relevant to stellar interiors. MUSIC is an implici
Externí odkaz:
http://arxiv.org/abs/1610.10053
Autor:
Pratt, J., Baraffe, I., Goffrey, T., Geroux, C., Viallet, M., Folini, D., Constantino, T., Popov, M., Walder, R.
Publikováno v:
A&A 593, A121 (2016)
Context: We study the impact of two-dimensional spherical shells on compressible convection. Realistic profiles for density and temperature from a one-dimensional stellar evolution code are used to produce a model of a large stellar convection zone r
Externí odkaz:
http://arxiv.org/abs/1606.07200
Autor:
Geroux, C., Baraffe, I., Viallet, M., Goffrey, T., Pratt, J., Constantino, T., Folini, D., Popov, M. V., Walder, R.
Publikováno v:
A&A 588, A85 (2016)
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:
http://arxiv.org/abs/1602.03325
Autor:
Viallet, M., Baraffe, I.
Studies of beryllium abundance in large samples of solar-type stars show a small fraction of extremely beryllium-deficient stars, which challenges our current understanding of light element depletion in these stars. We suggest two possible scenarios
Externí odkaz:
http://arxiv.org/abs/1209.1812
This paper describes the first steps of development of a new multidimensional time implicit code devoted to the study of hydrodynamical processes in stellar interiors. The code solves the hydrodynamical equations in spherical geometry and is based on
Externí odkaz:
http://arxiv.org/abs/1103.1524
Autor:
Viallet, M., Hameury, J. -M.
We discuss two mechanisms that could result in an enhancement of the mass transfer rate during outbursts of dwarf novae and soft X-ray transients: the hot outer disc rim itself could heat the L1 point and scattered radiation by optically thin outflow
Externí odkaz:
http://arxiv.org/abs/0807.4816