Zobrazeno 1 - 10
of 677
pro vyhledávání: '"Noort M"'
Poynting flux generated by random shuffling of photospheric magnetic footpoints is transferred through the upper atmosphere of the Sun where the plasma is heated to over 1 MK in the corona. High spatiotemporal resolution observations of the lower atm
Externí odkaz:
http://arxiv.org/abs/2410.04964
Autor:
Vukadinović, D., Smitha, H. N., Korpi-Lagg, A., van Noort, M., Durán, J. S. Castellanos, Solanki, S. K.
Publikováno v:
A&A 686, A262 (2024)
For many transitions, atomic data, such as the oscillator strength (log(gf)) and the central wavelength of the line, are poorly constrained or even unknown. We present and test a new inversion method that infers atomic line parameters and the height
Externí odkaz:
http://arxiv.org/abs/2404.03291
Autor:
Durán, J. S. Castellanos, Milanovic, N., Korpi-Lagg, A., Löptien, B., van Noort, M., Solanki, S. K.
Publikováno v:
A&A 687, A218 (2024)
We present a catalog that we named MODEST containing depth-dependent information on the atmospheric conditions inside sunspot groups of all types. The catalog is currently composed of 942 observations of 117 individual active regions with sunspots th
Externí odkaz:
http://arxiv.org/abs/2403.06960
Autor:
Kahil, F., Gandorfer, A., Hirzberger, J., Calchetti, D., Sinjan, J., Valori, G., Solanki, S. K., Van Noort, M., Albert, K., Jorge, N. Albelo, Alvarez-Herrero, A., Appourchaux, T., Rubio, L. R. Bellot, guez, J. Blanco Rodrí, Feller, A., Fiethe, B., Germerott, D., Gizon, L., Guerrero, L., Gutierrez-Marques, P., Kolleck, M., Korpi-Lagg, A., Michalik, H., Vacas, A. Moreno, arez, D. Orozco Su\', erez-Grande, I. P\', Kilders, E. Sanchis, Schou, J., uhle, U. Sch\", Staub, J., Strecker, H., iniesta, J. C. del Toro, Volkmer, R., Woch, J.
Publikováno v:
A&A 675, A61 (2023)
We use wavefront sensing to characterise the image quality of the the High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) data products during the second remote sensing window of the Solar Orbiter (SO) nominal mission
Externí odkaz:
http://arxiv.org/abs/2306.00163
Publikováno v:
A&A 673, A11 (2023)
Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. To effectively trace magnetic reconnection below the canopy of chromospheric fibrils, we a
Externí odkaz:
http://arxiv.org/abs/2302.11496
Publikováno v:
A&A 669, A144 (2023)
The current analysis is dedicated to a detailed investigation of the non-Local Thermodynamic Equilibrium (NLTE) effects influencing the formation of the Fe I 6173 A line, which is widely used by many instruments including the Helioseismic and Magneti
Externí odkaz:
http://arxiv.org/abs/2211.10236
Publikováno v:
A&A 655, A61 (2021)
Context. It is unclear why there is a rather sharp boundary in sunspots between the umbra and the penumbra. Both regions exhibit magnetoconvection, manifesting in penumbral filaments in the penumbra and in umbral dots in the umbra. Aims. Here we comp
Externí odkaz:
http://arxiv.org/abs/2110.01352
Publikováno v:
ApJ, 911, 71 (2021)
In the stellar chromospheres, radiative energy transport is dominated by only the strongest spectral lines. For these lines, the approximation of local thermodynamic equilibrium (LTE) is known to be very inaccurate, and a state of equilibrium cannot
Externí odkaz:
http://arxiv.org/abs/2104.13650
Publikováno v:
A&A 647, A46 (2021)
This paper forms the second part of our study on how the neglect of NLTE conditions in the formation of Fe I 6301.5 A and the 6302.5 A lines influences the atmosphere obtained by inverting their profiles in LTE. The main cause of NLTE effects is the
Externí odkaz:
http://arxiv.org/abs/2101.00506
Autor:
Chaouche, L. Yelles, Cameron, R. H., Solanki, S. K., Riethmüller, T. L., Anusha, L. S., Witzke, V., Shapiro, A. I., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., van Noort, M., Rodríguez, J. Blanco, Iniesta, J. C. Del Toro, Suárez, D. Orozco, Schmidt, W., Pillet, V. Martínez, Knölker, M.
Publikováno v:
A&A 644, A44 (2020)
The solar photosphere provides us with a laboratory for understanding turbulence in a layer where the fundamental processes of transport vary rapidly and a strongly superadiabatic region lies very closely to a subadiabatic layer. Our tools for probin
Externí odkaz:
http://arxiv.org/abs/2010.09037