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pro vyhledávání: '"Shiota, D."'
Akademický článek
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Publikováno v:
A&A 607, L2 (2017)
Aims. We report the small temporal variation of the axial dipole moment near the solar minimum and its application to the solar cycle prediction by the surface flux transport (SFT) model. Methods. We measure the axial dipole moment using the photosph
Externí odkaz:
http://arxiv.org/abs/1710.06528
We investigated the role of photospheric plasma motions in the formation and evolution of polar magnetic patches using time-sequence observations with high spatial resolution. The observations were obtained with the spectropolarimeter on board the Hi
Externí odkaz:
http://arxiv.org/abs/1412.8023
We develop a nonlinear force-free field (NLFFF) extrapolation code based on the magnetohydrodynamic (MHD) relaxation method. We extend the classical MHD relaxation method in two important ways. First, we introduce an algorithm initially proposed by c
Externí odkaz:
http://arxiv.org/abs/1311.3592
Publikováno v:
The Astrophysical Journal, 776:122 (6pp), 2013 October 20
The magnetic properties of the Sun's polar faculae are investigated with spectropolarimetric observations of the north polar region obtained by the Hinode satellite in 2007 September. Polar faculae are embedded in nearly all magnetic patches with flu
Externí odkaz:
http://arxiv.org/abs/1311.0980
Autor:
Savani, Neel P., Vourlidas, A., Shiota, D., Linton, M. G., Kusano, K., Lugaz, N., Rouillard, A. P.
We present a 2.5D MHD simulation of a magnetic flux rope (FR) propagating in the heliosphere and investigate the cause of the observed sharp plasma beta transition. Specifically, we consider a strong internal magnetic field and an explosive fast star
Externí odkaz:
http://arxiv.org/abs/1310.4747
We study the three-dimensional magnetic structure of solar active region 11158, which produced one X-class and several M-class flares on 2011 February 13$-$16. We focus on the magnetic twist in four flare events, M6.6, X2.2, M1.0, and M1.1. The magne
Externí odkaz:
http://arxiv.org/abs/1304.8073
We analyze the temporal evolution of the three-dimensional (3D) magnetic structure of the flaring active region (AR) NOAA 10930 by using the nonlinear force-free fields extrapolated from the photospheric vector magnetic fields observed by the Solar O
Externí odkaz:
http://arxiv.org/abs/1209.6131
We have been monitoring yearly variation in the Sun's polar magnetic fields with the Solar Optical Telescope aboard {\it Hinode} to record their evolution and expected reversal near the solar maximum. All magnetic patches in the magnetic flux maps ar
Externí odkaz:
http://arxiv.org/abs/1205.2154
Alfven waves created by sub-photospheric motions or by magnetic reconnection in the low solar atmosphere seem good candidates for coronal heating. However, the corona is also likely to be heated more directly by magnetic reconnection, with dissipatio
Externí odkaz:
http://arxiv.org/abs/0903.1766