Results 61 to 70 of about 2,960 (140)
Hemispheric Helicity Trend for Solar Cycle 24
, 2011 Using vector magnetograms obtained with the Spectro-polarimeter (SP) on aboard Hinode satellite, we studied two helicity parameters (local twist and current helicity) of 64 active regions occurred in the descending phase of solar cycle 23 and the ...
Bao +15 more
core +1 more source
Spectral magnetic helicity of solar active regions between 2006 and 2017
, 2019 We compute magnetic helicity and energy spectra from about 2485 patches of about 100 megameters (Mm) side length on the solar surface using data from Hinode during 2006--2017. An extensive database is assembled where we list magnetic energy and helicity,
Brandenburg, Axel, Gosain, Sanjay
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On the Absence of Photospheric Net Currents in Vector Magnetograms of Sunspots Obtained From Hinode (SOT/SP) [PDF]
, 2009 Various theoretical and observational results have been reported regarding the presence/absence of net electric currents in the sunspots. The limited spatial resolution of the earlier observations perhaps obscured the conclusions.
Baty +21 more
core +1 more source
Dynamics of Subsurface Flows in Solar Active Regions during the 2024 May Storm
The Astrophysical JournalIn 2024 May, the Sun exhibited intense magnetic activity, marked by numerous high-intensity flares resulting from the interaction and merging of NOAA active regions (ARs) 13664 and 13668 in the southern hemisphere and AR 13663 in the northern hemisphere.
B. Lekshmi +3 more
doaj +1 more source
Constraining the X-ray Luminosities of Asymptotic Giant Branch Stars: TX Cam and T Cas
, 2004 To probe the magnetic activity levels of asymptotic giant branch (AGB) stars, we used XMM-Newton to search for X-ray emission from two well-studied objects, TX Cam and T Cas.
Kastner, Joel H., Soker, Noam
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System-Level Mathematical Macro-Models of Logic MEMS Gates
Доклады Белорусского государственного университета информатики и радиоэлектроникиThe relevance of the study is due to the rapid development of microelectromechanical systems (MEMS), which are used as logic elements due to low power consumption, high reliability and the ability to reprogram during operation.
А. А. Solovev +2 more
doaj +1 more source
The electrical current density vector in the inner penumbra of a Sunspot
, 2010 We determine the entire electrical current density vector in a geometrical 3D volume of the inner penumbra of a sunspot from an inversion of spectropolarimetric data obtained with Hinode/SP.
Borrero +16 more
core +1 more source
The Three-Dimensional Structure of a Sunspot Magnetic Field
, 2005 Here we report on observations of the three-dimensional structure of a sunspot magnetic field from the photosphere to the chromosphere, obtained with the new visible/infrared spectro-polarimeter SPINOR.
Socas-Navarro, H.
core +1 more source
Generation of twist on magnetic flux tubes at the base of the solar convection zone
, 2012 Using two-dimensional magnetohydrodynamics calculations, we investigate a twist gen- eration mechanism on a magnetic flux tube at the base of the solar convection zone based on the idea of Choudhuri, 2003, Sol.
Hotta, H., Yokoyama, T.
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The Astrophysical JournalThe mechanism heating the solar corona remains unclear but is generally hypothesized to involve magnetic fields. One probe of this hypothesis is a statistical study relating coronal emission to magnetic flux. A. A. Pevtsov et al.
Keiji Yoshimura +2 more
doaj +1 more source