59 citations · 284 across the 18 of their papers we have counts for
15 papers · 1 filter
Effects of Magnetic Fields on Solar Inertial Modes in Global Nonlinear Simulations
Conrado S. Finotti, Gustavo Guerrero, Santiago A. Triana +2
Solar inertial modes are increasingly viewed as probes of the solar interior, with recent helioseismic evidence indicating that these modes may be sensitive to the internal magneti…
Simulations of the onset and dynamical evolution of inertial waves in solar/stellar interior
Mariane D. Souza-Gomes, Conrado S. Finotti, Gustavo Guerrero +4
Inertial modes have been recently detected in the Sun via helioseismology, yet their origin, evolution, and role in the dynamics of the solar plasma and magnetic field remain poorl…
Implicit large eddy simulations of global solar convection: effects of numerical resolution in non-rotating and rotating cases
G. Guerrero, A. M. Stejko, A. G. Kosovichev +2
Simulating deep solar convection and its coupled mean-field motions is a formidable challenge where few observational results constrain models that suffer from the non-physical inf…
Numerical convergence of 2D solar convection in implicit large-eddy simulations
H. D. Nogueira, G. Guerrero, P. K. Smolarkiewicz +1
Large-eddy simulations (LES) and implicit LES (ILES) are wise and affordable alternatives to the unfeasible direct numerical simulations (DNS) of turbulent flows at high Reynolds n…
Evolution of three-dimensional coherent structures in Hall magnetohydrodynamics
Kamlesh Bora, Ramit Bhattacharyya, Piotr K. Smolarkiewicz
The work extends the computational model EULAG-MHD to include Hall magnetohydrodynamics (HMHD)---important to explore physical systems undergoing fast magnetic reconnection at the…
3D MHD Modeling of the Impact of Subsurface Stratification on the Solar Dynamo
Andrey M. Stejko, Gustavo Guerrero, Alexander G. Kosovichev +1
Various models of solar subsurface stratification are tested in the global EULAG-MHD solver to simulate diverse regimes of near-surface convective transport. Sub- and superadiabaci…
Global simulations of Tayler instability in stellar interiors: The stabilizing effect of gravity
G. Guerrero, F. Del Sordo, A. Bonanno +1
Unveiling the evolution of toroidal field instability, known as Tayler instability, is essential to understand the strength and topology of the magnetic fields observed in early-ty…
What sets the magnetic field strength and cycle period in solar-type stars?
G. Guerrero, B. Zaire, P. K. Smolarkiewicz +3
Two fundamental properties of stellar magnetic fields have been determined by observations for solar-like stars with different Rossby numbers (Ro), namely, the magnetic field stren…
Magnetic field generation in PMS stars with and without radiative core
Bonnie Zaire, Gustavo Guerrero, Alexander Kosovichev +2
Recent observations of the magnetic field in pre-main sequence stars suggest that the magnetic field topology changes as a function of age. The presence of a tachocline could be an…
3D Global MHD Modeling of Solar Subsurface Convection
Andrey M. Stejko, Gustavo Guerrero, Alexander G. Kosovichev +1
Various models of solar sub-surface stratification are tested in the global EULAG-MHD solver to simulate diverse regimes of near-surface convective transport. Sub- and superadiabac…
On the role of repetitive magnetic reconnections in evolution of magnetic flux-ropes in solar corona
Sanjay Kumar, R. Bhattacharyya, Bhuwan Joshi +1
Parker's magnetostatic theorem extended to astrophysical magnetofluids with large magnetic Reynolds number supports ceaseless regeneration of current sheets and hence, spontaneous…
Understanding solar torsional oscillations from global dynamo models
G. Guerrero, P. K. Smolarkiewicz, E. M. de Gouveia Dal Pino +2
The phenomenon of solar "torsional oscillations" (TO) represents migratory zonal flows associated with the solar cycle. These flows are observed on the solar surface and, according…
Modelling turbulent stellar convection zones: sub-grid scales effects
A. Strugarek, P. Beaudoin, A. S. Brun +3
The impressive development of global numerical simulations of turbulent stellar interiors unveiled a variety of possible differential rotation (solar or anti-solar), meridional cir…
Solar differential rotation: hints to reproduce a near-surface shear layer in global simulations
G. Guerrero, P. K. Smolarkiewicz, A. Kosovichev +1
Convective turbulent motions in the solar interior, as well as the mean flows resulting from them, determine the evolution of the solar magnetic field. With the aim to get a better…
Torsional Oscillations in a Global Solar Dynamo
P. Beaudoin, P. Charbonneau, E. Racine +1
We characterize and analyze rotational torsional oscillations developing in a large-eddy magnetohydrodynamical simulation of solar convection (Ghizaru, Charbonneau, and Smolarkiewi…