Results 51 to 60 of about 10,165,445 (355)
Sudden transitions and grand variations in the solar dynamo, past and future☆
Journal of Space Weather and Space Climate, 2012 The solar dynamo is the exotic dance of the sun’s two major magnetic field components, the poloidal and the toroidal, interacting in anti-phase. On the basis of new data on the geomagnetic aa index, we improve our previous forecast of the properties of ...
De Jager Cornelis, Duhau Silvia
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The Astrophysical Journal, 2023 The plasma composition of the solar corona is different from that of the solar photosphere. Elements that have a low first ionization potential (FIP) are preferentially transported to the corona and therefore show enhanced abundances in the corona ...
Teodora Mihailescu +8 more
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BMC Public Health, 2020 Background Recent evidence suggests that work-related physical activity may not have the same mental health benefits as leisure-time physical activity.
Rhiannon Lee White +3 more
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Information Horizon of Solar Active Regions
The Astrophysical Journal Letters, 2023 Information theory is used to characterize the solar active region periodicities and memories from the Carrington map images 1974–2021. The active regions typically evolve and move from one map to the next.
Jay R. Johnson +3 more
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Magnetic twist and writhe of active regions On the origin of deformed flux tubes [PDF]
, 2014 We study the long term evolution of a set of 22 bipolar active regions (ARs) in which the main photospheric polarities are seen to rotate one around the other during several solar rotations.
M. Fuentes +4 more
semanticscholar +1 more source
Parameter Study of Geoeffective Active Regions
AtmosphereGeomagnetic storms (GSs) are major disturbances in the terrestrial atmosphere caused by the reconnection process between the incoming plasma ejecta in the solar wind and the planetary magnetosphere.
Rositsa Miteva +3 more
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Active Galactic Nuclei in Void Regions
, 2007 We present a comprehensive study of accretion activity in the most underdense environments in the universe, the voids, based on the SDSS DR2 data. Based on investigations of multiple void regions, we show that AGN's occurrence rate and properties differ ...
Anca Constantin +8 more
core +1 more source
Physics of outflows near solar active regions [PDF]
Annales Geophysicae, 2015 Hinode/EIS observations have revealed outflows near active regions which remain unexplained. An outflow region observed by the EUV Imaging Spectrometer (EIS) that appears slightly redshifted at low temperatures and blueshifted at higher temperatures ...
D. J. Price, Y. Taroyan
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Solar Corona Structures Detection and Segmentation Using Deep Neural Networks: A Survey
IEEE AccessImage segmentation and detection of solar corona structures are a critical part of space weather applications. In recent years, deep learning-based techniques have proven to be effective for various automatic solar image processing tasks.
Peter Butka +4 more
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First looks at solar active regions with ALMA
Frontiers in Astronomy and Space Sciences, 2022 During the first few years of observing the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA), the scientific community has acquired a number of observational datasets targeting various structures in active regions, including sunspot umbra
Maria Loukitcheva +4 more
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