Zobrazeno 1 - 10
of 2 393
pro vyhledávání: '"Georgoulis, A"'
Autor:
Francisco, Grégoire, Ramunno, Francesco Pio, Georgoulis, Manolis K., Fernandes, João, Barata, Teresa, Del Moro, Dario
The solar magnetized corona is responsible for various manifestations with a space weather impact, such as flares, coronal mass ejections (CMEs) and, naturally, the solar wind. Modeling the corona's dynamics and evolution is therefore critical for im
Externí odkaz:
http://arxiv.org/abs/2410.20843
Autor:
Nindos, A., Patsourakos, S., Moraitis, K., Archontis, V., Liokati, E., Georgoulis, M. K., Norton, A. A.
Using photospheric vector magnetograms obtained by the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory and a magnetic connectivity-based method, we compute the magnetic helicity and free magnetic energy budgets of a simple bi
Externí odkaz:
http://arxiv.org/abs/2409.00931
We introduce a new level-set shape optimization approach based on polytopic (i.e., polygonal in two and polyhedral in three spatial dimensions) discontinuous Galerkin methods. The approach benefits from the geometric mesh flexibility of polytopic dis
Externí odkaz:
http://arxiv.org/abs/2408.13206
Autor:
Biswal, Shreeyesh, Korsós, Marianna B., Georgoulis, Manolis K., Nindos, Alexander, Patsourakos, Spiros, Erdélyi, Robertus
The R-value is a measure of the strength of photospheric magnetic Polarity Inversion Lines (PILs) 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, no
Externí odkaz:
http://arxiv.org/abs/2408.04018
We estimate the near-Sun axial magnetic field of a coronal mass ejection (CME) on 10 March 2022. Solar Orbiter's in situ measurements, 7.8 degrees east of the Sun-Earth line at 0.43 AU, provided a unique vantage point, along with the WIND measurement
Externí odkaz:
http://arxiv.org/abs/2408.01142
Autor:
Ramunno, Francesco Pio, Jeong, Hyun-Jin, Hackstein, Stefan, Csillaghy, André, Voloshynovskiy, Svyatoslav, Georgoulis, Manolis K.
Investigating the solar magnetic field is crucial to understand the physical processes in the solar interior as well as their effects on the interplanetary environment. We introduce a novel method to predict the evolution of the solar line-of-sight (
Externí odkaz:
http://arxiv.org/abs/2407.11659
Autor:
Kontogiannis, I., Georgoulis, M. K.
We study the evolution of electric currents during the emergence of magnetic flux in the solar photosphere and the differences exhibited between solar active regions of different Hale complexity classes. A sample of 59 active regions was analyzed usi
Externí odkaz:
http://arxiv.org/abs/2406.00520
Sigmoids produce strong eruptive events. Earlier studies have shown that the ICME axial magnetic field Bz can be predicted with some credibility by observing the corresponding filament or the polarity inversion line in the region of eruption and deri
Externí odkaz:
http://arxiv.org/abs/2403.17075
Autor:
Georgoulis, Stamatios, Ren, Weining, Bochicchio, Alfredo, Eckert, Daniel, Li, Yuanyou, Gawel, Abel
Rapid and reliable identification of dynamic scene parts, also known as motion segmentation, is a key challenge for mobile sensors. Contemporary RGB camera-based methods rely on modeling camera and scene properties however, are often under-constraine
Externí odkaz:
http://arxiv.org/abs/2403.04562
We propose a new stabilised finite element method for the classical Kolmogorov equation. The latter serves as a basic model problem for large classes of kinetic-type equations and, crucially, is characterised by degenerate diffusion. The stabilisatio
Externí odkaz:
http://arxiv.org/abs/2401.12921