Zobrazeno 1 - 10
of 337
pro vyhledávání: '"Bushby, P. J."'
Resistive tearing instabilities are common in fluids that are highly electrically conductive and carry strong currents. We determine the effect of stable stratification on the tearing instability under the Boussinesq approximation. Our results genera
Externí odkaz:
http://arxiv.org/abs/2408.13210
Shear-driven magnetic buoyancy in the solar tachocline: The mean electromotive force due to rotation
The leading theoretical paradigm for the Sun's magnetic cycle is an $\alpha\omega$-dynamo process, in which a combination of differential rotation and turbulent, helical flows produces a large-scale magnetic field that reverses every 11 years. Most $
Externí odkaz:
http://arxiv.org/abs/2301.05067
The presence of acoustic waves in models of compressible flows can present complications for analytical and numerical analysis. Therefore, several methods have been developed to filter out these waves, leading to various "sound-proof" models, includi
Externí odkaz:
http://arxiv.org/abs/2209.13315
We use results of shallow-water magnetohydrodynamics (SWMHD) to place estimates on the minimum magnetic field strengths required to cause atmospheric wind variations (and therefore westward venturing hotspots) for a dataset of hot Jupiters (HJs), inc
Externí odkaz:
http://arxiv.org/abs/2107.10848
Magnetically-driven hotspot variations (which are tied to atmospheric wind variations) in hot Jupiters are studied using non-linear numerical simulations of a shallow-water magnetohydrodynamic (SWMHD) system and a linear analysis of equatorial SWMHD
Externí odkaz:
http://arxiv.org/abs/2107.07515
We study dynamo action using numerical simulations of planar Boussinesq convection at rapid rotation (low Ekman numbers, Ek), focusing on subcritical dynamo action in which the dynamo is sustained for Rayleigh numbers, Ra, below the critical Rayleigh
Externí odkaz:
http://arxiv.org/abs/2011.00852
The presence of magnetic fields in many astrophysical objects is due to dynamo action, whereby a part of the kinetic energy is converted into magnetic energy. A turbulent dynamo that produces magnetic field structures on the same scale as the turbule
Externí odkaz:
http://arxiv.org/abs/2003.07997
Publikováno v:
2019MNRAS.488.5065E
We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium (ISM) in simulations that admit dynamo action. As the magnetic field is amplified to become dynamically signifi
Externí odkaz:
http://arxiv.org/abs/1903.10263
Publikováno v:
The Astrophysical Journal Letters (2019), Volume 872, Number 2
Westward winds have now been inferred for two hot Jupiters (HJs): HAT-P-7b and CoRoT-2b. Such observations could be the result of a number of physical phenomena such as cloud asymmetries, asynchronous rotation, or magnetic fields. For the hotter HJs
Externí odkaz:
http://arxiv.org/abs/1902.09683
Interpretations of synchrotron observations often assume a tight correlation between magnetic and cosmic ray energy densities. We examine this assumption using both test-particle simulations of cosmic rays and MHD simulations which include cosmic ray
Externí odkaz:
http://arxiv.org/abs/1810.03683