Results 101 to 110 of about 2,333,019 (349)

On Theories of Solar Rotation [PDF]

Symposium - International Astronomical Union, 1976
The main theories of solar rotation are critically reviewed.The interaction of large-scale convection with rotation gives rise to a transport of angular momentum towards the equator and therefore to differential rotation with equatorial acceleration. (Large-scale convection is defined as follows: in a highly turbulent fluid, the small-scale turbulence ...
openaire   +1 more source

Observation of a reversal of rotation in a sunspot during a solar flare

Nature Communications, 2016
The abrupt motion of the photospheric flux during a solar flare is thought to be a back reaction caused by the coronal field reconfiguration. However, the type of motion pattern and the physical mechanism responsible for the back reaction has been ...
Y. Bi, Yunchun Jiang, Jiayan Yang, Junchao Hong, Haidong Li, Bo Yang, Zhe Xu   +6 more
semanticscholar   +1 more source

Space- and ground-based investigations of solar wind-magnetosphere-ionosphere coupling [PDF]

, 2006
This paper provides a brief review of the understanding of the coupled solar wind–magnetosphere–ionosphere system that can be attained from observations of the size of the ionospheric polar caps from space and the ground.
Milan, S. E., Wild, J. A., Draper, N. C., Grocott, A.   +3 more
core  

Three‐Dimensional Printed Microarchitected Hierarchically Porous Biodegradable PLA/S/CNT Nanocomposite Electrodes for High‐Performance Lithium–Sulfur Batteries

Advanced Materials Technologies, EarlyView.
Hierarchically microarchitected PLA/S/CNT cathodes are fabricated via scalable fused filament 3D printing as high‐sulfur‐loading hosts for rechargeable lithium–sulfur batteries. The assembled Li–S cells with sulfur loadings up to 17 mg cm−2 deliver an areal capacity of 9.2 mAh cm−2 and retain 96% of their discharge capacity after 100 charge–discharge ...
Vinay Gupta, Pawan Verma, Fahad Alam, Krishnaiahnahundi Manjunathaswamy Mohan, Shanumgam Kumar   +4 more
wiley   +1 more source

Rotation, activity, and stellar obliquities in a large uniform sample of Kepler solar analogs

Journal of Space Weather and Space Climate, 2016
In this study, we undertook a deep photometric examination of a narrowly-defined sample of solar analogs in the Kepler field, with the goals of producing a uniform and statistically meaningful sample of such stars, comparing the properties of planet ...
Buzasi Derek, Lezcano Andy, Preston Heather L.   +2 more
doaj   +1 more source

The global rotation of solar activity structures

, 2009
Aims. This paper investigates the rotation rate of solar activity from a global point of view, considering daily index or flux, instead of individual structures.
Z. Mouradian, Heristchi, Djamshid, D. Heristchi, Mouradian, Zadig   +3 more
core   +1 more source

Solar active longitudes and their rotation [PDF]

, 2013
In this thesis solar active longitudes of X-ray flares and sunspots are studied. The fact that solar activity does not occur uniformly at all heliographic longitudes was noticed by Carrington as early as in 1843. The longitude ranges where solar activity
Zhang, Liyun
core   +1 more source

Surface differential rotation and photospheric magnetic field of the young solar-type star HD 171488 (V889 Her) [PDF]

, 2006
We present spectropolarimetric observations of the young, single early G-dwarf HD 171488. These observations were obtained over a five-night period in 2004 September at the 3.9-m Anglo-Australian Telescope using the SEMPOL spectropolarimeter visitor ...
Donati, J-F., Carter, B.D., Semel, M., Donati, J.-F., Petit, P., Marsden, S. C., Marsden, S.C., Carter, B. D.   +7 more
core   +1 more source

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source

Characteristics of the Solar Differential Rotation and Activity During Solar Cycle No. 24

Universe
An analysis of the solar differential rotation (DR) during solar cycle No. 24 (SC24) (2009–2019), based on the Kanzelhöhe Observatory for Solar and Environmental Research (KSO) data set, is presented.
Ivana Poljančić Beljan, Luka Šibenik, Klaudija Lončarić, Tomislav Jurkić, Rajka Jurdana-Šepić, Werner Pötzi, Damir Hržina, Roman Brajša, Astrid M. Veronig, Arnold Hanslmeier   +9 more
doaj   +1 more source