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pro vyhledávání: '"Brummell, Nicholas"'
Autor:
Manek, Bhishek, Brummell, Nicholas
Sunspots and active regions observed on the solar surface are widely believed to be manifestations of compact predominantly-toroidal magnetic field structures (``flux tubes") that emerge by magnetic buoyancy from the deeper interior of the Sun. Much
Externí odkaz:
http://arxiv.org/abs/2406.13104
Autor:
Vasil, Geoffrey M, Lecoanet, Daniel, Augustson, Kyle, Burns, Keaton J, Oishi, Jeffrey S, Brown, Benjamin P, Brummell, Nicholas, Julien, Keith
The Sun's magnetic dynamo cycle features a distinct pattern: a propagating region of sunspot emergence appears around 30 degrees latitude and vanishes near the equator every 11 years. Moreover, longitudinal flows called "torsional oscillations" close
Externí odkaz:
http://arxiv.org/abs/2404.07740
We recently presented the first 3D numerical simulation of the solar interior for which tachocline confinement was achieved by a dynamo-generated magnetic field. In this followup study, we analyze the degree of confinement as the magnetic field stren
Externí odkaz:
http://arxiv.org/abs/2311.10202
Autor:
Featherstone, Nicholas A., Augustson, Kyle C., Aurnou, Jonathan M., Blume, Catherine, Brown, Benjamin P., Brummell, Nicholas, Burns, Keaton J., Calkins, Michael A., Camisassa, Maria, Dikpati, Mausumi, Fan, Yuhong, Fuentes, J. R., Guerrero, Gustavo, Hindman, Bradley W., Julien, Keith, Kitiashvili, Irina N., Korre, Lydia, Lecoanet, Daniel, Manek, Bhishek, Matilsky, Loren, Miesch, Mark, Nelson, Nicholas J., Oishi, Jeffrey S., Powers, Whitney T., Rempel, Matthias, Soderlund, Krista, Stejko, Andrey M., Vasil, Geoffrey M.
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might plausibly contribute to its operation have been proposed, but the relati
Externí odkaz:
http://arxiv.org/abs/2305.08823
Publikováno v:
ApJ 929 162 (2022)
Inspired by observations of sunspots embedded in active regions, it is often assumed that large-scale, strong magnetic flux emerges from the Sun's deep interior in the form of arched, cylindrical structures, colloquially known as flux tubes. Here, we
Externí odkaz:
http://arxiv.org/abs/2204.13078
Autor:
Manek, Bhishek, Brummell, Nicholas
Solar active regions and sunspots are believed to be formed by the emergence of strong toroidal magnetic flux from the solar interior. Modeling of such events has focused on the dynamics of compact magnetic entities, colloquially known as "flux tubes
Externí odkaz:
http://arxiv.org/abs/2101.03472
Motivated by the dynamics in the deep interiors of many stars, we study the interaction between overshooting convection and the large-scale poloidal fields residing in radiative zones. We have run a suite of 3D Boussinesq numerical calculations in a
Externí odkaz:
http://arxiv.org/abs/2008.01857
Akademický článek
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We study the dynamics associated with the extension of turbulent convective motions from a convection zone (CZ) into a stable region (RZ) that lies below the latter. For that purpose, we have run a series of three-dimensional direct numerical simulat
Externí odkaz:
http://arxiv.org/abs/1810.06700
The buoyant transport of magnetic fields from the solar interior towards the surface plays an important role in the emergence of active regions, the formation of sunspots and the overall solar dynamo. Observations suggest that toroidal flux concentra
Externí odkaz:
http://arxiv.org/abs/1805.08806