Results 41 to 50 of about 39,674 (273)

What sets the magnetic field strength and cycle period in solar-type stars? [PDF]

, 2019
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 strength and the magnetic cycle period. The field strength exhibits two regimes:
Guerrero, G., Kosovichev, A. G., Mansour, N. N., Pino, E. M. de Gouveia Dal, Smolarkiewicz, P. K., Zaire, B.   +5 more
core   +4 more sources

Stability of toroidal magnetic fields in the solar tachocline and beneath [PDF]

, 2007
Stability of toroidal magnetic field in a stellar radiation zone is considered for the cases of uniform and differential rotation. In the rigidly rotating radiative core shortly below the tachocline, the critical magnetic field for instability is about ...
Barnes, Barnes, Basu, Cally, Charbonneau, Charbonneau, Christensen-Dalsgaard, Dziembowski, Garaud, Gilman, Gilman, Kitchatinov, Kitchatinov, Kitchatinov, Küker, Miesch, Pitts, Rüdiger, Rüdiger, Schou, Spruit, Stix, Tayler, Watson, Zahn   +24 more
core   +1 more source

Manufacturing of Rotational Toroidal Shells in Coin Minting

Eng
A novel forming process was developed to create rotating elements in collector coins by shaping thin-walled tubes into toroidal shells in a single stage. This process introduces new aesthetic effects and functionalities to the coin market. By controlling
Luís M. Alves, Paulo Alexandrino, Sónia Pereira   +2 more
doaj   +1 more source

Dynamics of Threads Wrapping a Filament's Leg Prior to the Eruption on 2021 October 28

The Astrophysical Journal, 2023
Although the magnetic field structures of solar filaments have been studied for several decades, the detailed evolution of the structure around a filament prior to its eruption is rarely observed. On 2021 October 28 in AR 12887, a major solar flare (X1.0
Yue Fang, Jun Zhang, Yi Bi, Zhiping Song
doaj   +1 more source

Isotope Effects on Intrinsic Toroidal Rotation and Rotation Reversals

, 2022
JET is the largest tokamak in operation and the main link between smaller machines, where intrinsic rotation has been mostly studied, and ITER the next step in fusion research. While the main ion in present tokamak plasmas is a single hydrogen isotope, mainly Deuterium (D) in JET, future nuclear fusion machines, such as ITER, will operate with a ...
Nave, M., Delabie, E., Ferreira, J., Garcia, J., King, D., Lennholm, M., Lomanowski, B., Parra, F., Fernandez, P., Bernardo, J., Baruzzo, M., Barnes, M., Casson, F., Hillesheim, J., Hubber, A., Joffrin, E., Kappatou, A. ; https://orcid.org/0000-0003-3341-1909, Maggi, C., Mauriya, A., Meneses, L., Romanelli, M., Salzedas, F.   +21 more
openaire   +3 more sources

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

Effects of neoclassical toroidal viscosity on toroidal rotation under electron cyclotron resonance heating on J-TEXT tokamak

Nuclear Fusion
Influence of neoclassical toroidal viscosity (NTV) torque on intrinsic toroidal rotation caused by internal kink mode (IKM) in the J-TEXT tokamak is studied.
Hanhui Li, Youwen Sun, Lu Wang, Xingting Yan, Hui Sheng, Zhoujun Yang, Li Gao, Yonghua Ding, Zhongyong Chen, Zhipeng Chen, Donghui Xia, Wei Yan, Da Li, J-TEXT Team   +13 more
doaj   +1 more source

Magnetic Cycles in a Convective Dynamo Simulation of a Young Solar-type Star [PDF]

, 2011
Young solar-type stars rotate rapidly and many are magnetically active; some undergo magnetic cycles similar to the 22-year solar activity cycle. We conduct simulations of dynamo action in rapidly rotating suns with the 3D MHD anelastic spherical ...
Allan Sacha Brun, Arfken, Ballot, Benjamin P. Brown, Brown, Brown, Browning, Browning, Brun, Brun, Brun, Charbonneau, Charbonneau, Cline, Cline, Clyne, Dikpati, Dikpati, Featherstone, Ghizaru, Hall, Hempelmann, Jouve, Juri Toomre, Lanza, Mark S. Miesch, Matt, Matthew K. Browning, Metcalfe, Miesch, Miesch, Miesch, Mitra, Moreno-Insertis, Muñoz-Jaramillo, Nandy, Rempel, Rempel, Rempel, Rempel, Saar, Spruit, Stix, Yeates   +43 more
core   +4 more sources

Electric‐Current‐Assisted Nucleation of Zero‐Field Hopfion Rings

Advanced Materials, EarlyView.
This work reports a novel and efficient nucleation protocol for 3D localized topological magnetic solitons‐hopfion rings in chiral magnets using pulsed electric currents. By using Lorentz transmission electron microscopy and topological analysis, we report characteristic features and extraordinary stability of hopfion rings in zero or inverted external
Xiaowen Chen, Dongsheng Song, Filipp N. Rybakov, Nikolai S. Kiselev, Long Li, Wen Shi, Rui Wu, Xuewen Fu, Olle Eriksson, Stefan Blügel, Rafal E. Dunin‐Borkowski, Haifeng Du, Fengshan Zheng   +12 more
wiley   +1 more source

Tilted torus magnetic fields in neutron stars and their gravitational wave signatures

, 2013
Gravitational-wave diagnostics are developed for discriminating between varieties of mixed poloidal-toroidal magnetic fields in neutron stars, with particular emphasis on differentially rotating protoneutron stars.
Lasky, Paul D., Melatos, Andrew
core   +1 more source