Results 91 to 100 of about 961,519 (212)

Multi-height probing of horizontal flows in the solar photosphere

Astronomy & Astrophysics
Context. Optical flow methods aim to infer horizontal (transverse, in the general case) velocities in the solar atmosphere from the temporal changes in maps of physical quantities, such as intensity or magnetic field.
Kostić T., Milić I., Rempel M., Welsch B., Kazachenko M., Asensio Ramos A., Tremblay B.   +6 more
doaj   +1 more source

Wavelet analysis of spatial coherent structures in the photosphere

, 1999
In this work we present some applications of wavelet analysis to the dynamics of the photosphere as obtained from a good serie of high spatial resolution white light images taken at the Vacuum Tower Telescope (VTT) at the NSO/SPO in October 1996. The use
Berrilli, F, Bruno, R, Bavassano, B., PIETROPAOLO, Ermanno, Straus, T, Cauzzi, G, Smaldone, LA, Consolini, G   +7 more
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Designing photovolaic/thermal solar collectors for building integration [PDF]

, 2008
With concern growing over the environment and resource use, there has been greater emphasis placed on sustainability, particularly in the built environment.
Carson, James K., Duke, Mike, Anderson, Timothy Nicholas   +2 more
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Statistical behaviour of a proxy of the entropy production rate of the solar photosphere [PDF]

, 2019
The solar photosphere provides an incomparable laboratory to study turbulent convection in a dissipative non-equilibrium system. The evaluation of the entropy production rate on the solar photosphere and its probability distribution are the key issues ...
Viavattene G., Berrilli, F., Del Moro, D., Giannattasio F., Penza, V., Berrilli F., Consolini, G., Consolini G., Giovannelli, L., Penza V., Del Moro D., Giovannelli L., Viavattene, G., Giannattasio, F.   +13 more
core   +1 more source

Case Studies on Pre-eruptive X-class Flares using R-value in the Lower Solar Atmosphere

The Astrophysical Journal
The R -value is a measure of the strength of photospheric magnetic polarity inversion lines in active regions (ARs). This work investigates the possibility of a relation between R -value variations and the occurrence of X-class flares in ARs, not in the ...
Shreeyesh Biswal, Marianna B. Korsós, Manolis K. Georgoulis, Alexander Nindos, Spiros Patsourakos, Robertus Erdélyi   +5 more
doaj   +1 more source

Convection-driven Multiscale Magnetic Fields Determine the Observed Solar Disk Gamma Rays

The Astrophysical Journal
The solar disk is a continuous source of GeV–TeV gamma rays. The emission is thought to originate from hadronic Galactic cosmic rays (GCRs) interacting with the gas in the photosphere and uppermost convection zone after being reflected by solar magnetic ...
Jung-Tsung Li, Mahboubeh Asgari-Targhi, John F. Beacom, Annika H. G. Peter   +3 more
doaj   +1 more source

Chromospheric Magnetic Field Extrapolations Reveal the Flux-rope Configuration of a Solar Filament

The Astrophysical Journal Letters
Solar eruptions are powered by the release of magnetic energy stored in the lower solar atmosphere, but the preeruptive magnetic configuration of filament channels remains difficult to determine.
Robert Jarolim, João M. da Silva Santos, Matthias Rempel, Marianna B. Korsós, Robertus Erdélyi, Astrid Veronig, Szabolcs Soós, David Kuridze   +7 more
doaj   +1 more source

MgIb(2) bright features in the solar photosphere

, 2000
The magnetic network is a key component of solar irradiance and of the energy transport toward the corona. These network structures are associated in the photosphere with bright magnetic elements, whose dynamics is determined by granulation.
Florio, A, Berrilli, F, Bruno, R, PIETROPAOLO, Ermanno, Consolini, G   +4 more
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The Plasma β in Quiet Sun Regions: Multi-instrument View

The Astrophysical Journal
A joint campaign of several spaceborne and ground-based observatories, such as the GREGOR solar telescope, the Extreme-ultraviolet Imaging Spectrometer (EIS), and the Interface Region Imaging Spectrograph (Hinode Observing Plan 381, 2019 October 11–22 ...
Jenny M. Rodríguez-Gómez, Christoph Kuckein, Sergio J. González Manrique, Jonas Saqri, Astrid Veronig, Peter Gömöry, Tatiana Podladchikova   +6 more
doaj   +1 more source

A NUMERICAL APPROACH TO OHMIC LOSSES ASSESSMENT IN CONCENTRATING PHOTOVOLTAIC SYSTEMS [PDF]

, 2012
It is well known that concentrator solar cells operating under concentration experience a number of physical effects which affect their performances. In particular, ohmic losses can determine a noticeable performance worsening of concentrator solar cells.
Pasquini, Matteo
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