Results 91 to 100 of about 22,416 (198)

The asymmetry of sunspot cycles and Waldmeier relations as due to nonlinear surface-shear shaped dynamo

, 2011
The paper presents a study of a solar dynamo model operating in the bulk of the convection zone with the toroidal magnetic field flux concentrated in the subsurface rotational shear layer.
A. G. Kosovichev, Benevolenskaya, Birch, Bracewell, Brandenburg, Cameron, Choudhuri, Karak, Kitchatinov, Kitchatinov, Kitiashvili, Kleeorin, Kleeorin, Kleeorin, Moffatt, Parker, Pipin, Pipin, Ruediger, SIDC., Stix, V. V. Pipin, Vishniac, Vitinsky, Waldmeier   +24 more
core   +1 more source

Production of Sunspots and Their Effects on the Corona and Solar Wind: Insights from a New 3D Flux-Transport Dynamo Model

Frontiers in Astronomy and Space Sciences, 2018
We present a three-dimensional numerical model for the generation and evolution of the magnetic field in the solar convection zone, in which sunspots are produced and contribute to the cyclic reversal of the large-scale magnetic field. We then assess the
Rohit Kumar, Laurène Jouve, Rui F. Pinto, Alexis P. Rouillard   +3 more
doaj   +1 more source

Magnetic twist: a source and property of space weather

Journal of Space Weather and Space Climate, 2012
Aim: We present evidence for finite magnetic helicity density in the heliosphere and numerical models thereof, and relate it to the magnetic field properties of the dynamo in the solar convection zone.
Mitra Dhrubaditya, Brandenburg Axel, Warnecke Jörn   +2 more
doaj   +1 more source

A Synchronized Two-Dimensional α-Ω Model of the Solar Dynamo. [PDF]

Sol Phys, 2023
Klevs M, Stefani F, Jouve L.
europepmc   +1 more source

Investigating Variations in Solar Differential Rotation by Helioseismology

The Astrophysical Journal
Helioseismic signatures of dynamo waves have recently been discovered in variations of the solar differential rotation, offering valuable insights into the type of dynamo mechanism operating in the solar convection zone. To characterize these variations,
Krishnendu Mandal, Alexander G. Kosovichev, Valery V. Pipin, Sylvain G. Korzennik   +3 more
doaj   +1 more source

Long-term solar activity and its implications to the heliosphere, geomagnetic activity, and the Earth’s climate

Journal of Space Weather and Space Climate, 2013
The Sun’s long-term magnetic variability is the primary driver of space climate. This variability is manifested not only in the long-observed and dramatic change of magnetic fields on the solar surface, but also in the changing solar radiative output ...
Tanskanen Eija, Nandy Dibyendu, Manoharan Periasamy, Mursula Kalevi, Verronen Pekka   +4 more
doaj   +1 more source

The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling or Providing Crucial Observational Constraints?

Frontiers in Astronomy and Space Sciences, 2018
In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle.
Abhishek K. Srivastava, Scott W. McIntosh, N. Arge, Dipankar Banerjee, Mausumi Dikpati, Bhola N. Dwivedi, Madhulika Guhathakurta, B.B. Karak, B.B. Karak, Robert J. Leamon, Robert J. Leamon, Shibu K. Matthew, Andres Munoz-Jaramillo, D. Nandy, Aimee Norton, L. Upton, S. Chatterjee, Rakesh Mazumder, Yamini K. Rao, Rahul Yadav   +19 more
doaj   +1 more source

Simulating the Solar Dynamo [PDF]

Symposium - International Astronomical Union, 1993
Mean-field and direct simulations of the hydrodynamics and hydromagnetics of the solar convection zone are discussed with the ultimate aim to understand the generation of differential rotation and magnetic fields. Various arguments constraining the values of the various turbulent diffusion coefficients are presented.
openaire   +1 more source

Stellar Cycle Variability in Mount Wilson Stars and Dynamo Models: Rotation Rate and Dynamo Number Dependency

The Astrophysical Journal
Similar to the solar cycle, the magnetic cycles of other solar-type stars are also variable. How the variability of the stellar cycle changes with the rotation rate or the dynamo number is valuable information for understanding the stellar dynamo process.
Suyog Garg, Rohan B. Mandrai, Bidya Binay Karak   +2 more
doaj   +1 more source

Discriminating between Babcock–Leighton-type Solar Dynamo Models by Torsional Oscillations

The Astrophysical Journal
The details of the dynamo process in the Sun are an important aspect of research in solar-terrestrial physics and astrophysics. The surface part of the dynamo can be constrained by direct observations, but the subsurface part lacks direct observational ...
Congyi Zhong, Jie Jiang, Zebin Zhang
doaj   +1 more source