Results 101 to 110 of about 22,416 (198)
, 2016 We present composite time series of Ca II H & K line core emission indices of up to 50 years in length for a set of 27 solar-analog stars (spectral types G0-G5; within ~10% of the solar mass) and the Sun. These unique data are available thanks to the long-term dedicated efforts of the Mount Wilson Observatory HK project, the Lowell Observatory ...
Egeland, Ricky +5 more
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On the Origin of Long-term Modulation in the Sun’s Magnetic Activity Cycle
The Astrophysical Journal LettersOne of the most striking manifestations of orderly behavior emerging out of complex interactions in any astrophysical system is the 11 yr cycle of sunspots.
Chitradeep Saha +2 more
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LARGE-SCALE MAGNETIC AND VORTEX STRUCTURES IN A TURBULENT MEDIUM
East European Journal of Physics, 2016 The survey covers a main achievements in the field of dynamo theory. Applications of the model of turbulent convective dynamo to the problem of generation of a large-scale vortexes and magnetic structures in the solar photosphere are discussed ...
V. V. Yanovsky, A. V. Tur, M. I. Kopp
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Solar Field Mapping and Dynamo Behavior
Advances in Astronomy, 2012 We discuss the importance of the Sun’s large-scale magnetic field to the Sun-Planetary environment. This paper narrows its focus down to the motion and evolution of the photospheric large-scale magnetic field which affects many environments throughout ...
Kenneth H. Schatten
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Tidal Control of Equatorial Vertical E × B Drift Under Solar Minimum Conditions
Geophysical Research LettersObservations show that equatorial ionospheric vertical drifts during solar minimum differ from the climatology between late afternoon and midnight. By analyzing WACCM‐X simulations, which reproduce this solar cycle dependence, we show that the interplay ...
H.‐L. Liu, A. Maute
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Genetic Algorithm for Inferring Model Parameters for Flux Transport Dynamo Simulation
The Astrophysical JournalThe Sun exhibits an 11 yr cyclic variation, maintained by dynamo action in the solar interior. Mean-field flux transport dynamo models have successfully reproduced most of the features observed in solar cycles, while the model includes many free ...
Y. Shimizu, H. Hotta
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Slow Solar Wind: Origin in an Independent Small‐Scale Solar Dynamo
Geophysical Research LettersSeparation of the solar wind (SW) into three flow types (coronal mass ejections (CMEs), high speed streams (HSSs), and slow solar wind (SSW)) reveals an inverse relationship between the percentage of time Earth spends in SSW during a year and its ...
E. W. Cliver +2 more
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Eos, Transactions American Geophysical Union, 1994 This article is part of a series that investigates topics in space physics and aeronomy. The solar dynamo is the process by which the Sun's magnetic field is generated through the interaction of the field with convection and rotation. In this, it is kin to planetary dynamos and other stellar dynamos.
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Living Reviews in Solar Physics, 2010 A review of solar cycle prediction methods and their performance is given, including forecasts for cycle 24. The review focuses on those aspects of the solar cycle prediction problem that have a bearing on dynamo theory.
Kristóf Petrovay
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Shedding Light on the Solar Dynamo Using Data-driven Bayesian Parameter Inference
The Astrophysical JournalWe use a zero-dimensional stochastic dynamo model describing the coupled oscillatory behavior of the toroidal and poloidal components of the solar magnetic field.
Simone Ulzega +4 more
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