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of 525
pro vyhledávání: '"N Bello"'
The magnetic properties of the umbra-penumbra (UP) boundary of sunspots and the boundary of pores at various evolutionary stages have been characterised using datasets from different instruments. We aim to study the differences between the intensity
Externí odkaz:
http://arxiv.org/abs/2406.15272
Autor:
García-Rivas, M., Jurčák, J., González, N. Bello, Borrero, J. M., Schlichenmaier, R., Lindner, P.
Publikováno v:
A&A 686, A112 (2024)
Context. Fully fledged penumbrae have been widely studied both observationally and theoretically. Yet the relatively fast process of penumbra formation has not been studied closely with high spatial resolution. Aims. We investigate the stages previou
Externí odkaz:
http://arxiv.org/abs/2403.18455
Autor:
Lindner, P., Kuckein, C., Manrique, S. J. González, González, N. Bello, Kleint, L., Berkefeld, T.
Publikováno v:
A&A 673, A64 (2023)
While it is being conjectured that a chromospheric canopy plays a role in penumbra formation, it has been difficult to find observational evidence of the connectivity between the photosphere and the chromosphere. We investigate the existence of a chr
Externí odkaz:
http://arxiv.org/abs/2303.07112
Autor:
N., Bello1 nosabello@uniben.edu, O. S., Omorogiuwa1 sam@uniben.edu, I. V., Akhihiero1 victor.akhihiero@eng.uniben.edu, E. S., Akpala1 somto.akpala@eng.uniben.edu
Publikováno v:
Journal of Engineering Sciences. Sep/Oct2024, Vol. 52 Issue 5, p73-87. 15p.
Publikováno v:
2021A&A...656A..92S
We analyse a sunspot simulation in an effort to understand the origin of the convective instabilities giving rise to the penumbral and umbral distinct regimes. We applied the criterion from Gough \& Tayler (1966), accounting for the stabilising effec
Externí odkaz:
http://arxiv.org/abs/2210.17245
Publikováno v:
A&A 649, A129 (2021)
Context. Analyses of magnetic properties on umbrae boundaries led to the Jurcak criterion, which states that umbra-penumbra boundaries in stable sunspots are equally defined by a constant value of the vertical magnetic field, Bver_crit, and by 0.5 co
Externí odkaz:
http://arxiv.org/abs/2102.08459
Publikováno v:
A&A 638, A25 (2020)
The vertical component of the magnetic field ($B_\perp$) was found to reach a constant value at the umbra-penumbra boundary of stable sunspots in a recent statistical study of Hinode/SP data. The objective of this work is to verify the existence of a
Externí odkaz:
http://arxiv.org/abs/2004.09956
Akademický článek
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Publikováno v:
A&A 622, L12 (2019)
Aims. Moreno-Insertis et al. (2018) recently discovered two types of flux emergence in their numerical simulations: magnetic loops and magnetic sheet emergence. Whereas magnetic loop emergence has been documented well in the last years, by utilising
Externí odkaz:
http://arxiv.org/abs/1901.05870
Autor:
Verma, M., Balthasar, H., Denker, C., Böhm, F., Fischer, C. E., Kuckein, C., Manrique, S. J. González, Sobotka, M., González, N. Bello, Diercke, A., Berkefeld, T., Collados, M., Feller, A., Hofmann, A., Lagg, A., Nicklas, H., Suárez, D. Orozco, Yabar, A. Pastor, Rezaei, R., Schlichenmaier, R., Schmidt, D., Schmidt, W., Sigwarth, M., Solanki, S. K., Soltau, D., Staude, J., Strassmeier, K. G., Volkmer, R., von der Lühe, O., Waldmann, T.
The solar magnetic field is responsible for all aspects of solar activity. Sunspots are the main manifestation of the ensuing solar activity. Combining high-resolution and synoptic observations has the ambition to provide a comprehensive description
Externí odkaz:
http://arxiv.org/abs/1805.07752