Zobrazeno 1 - 10
of 433
pro vyhledávání: '"Bommier, V."'
Publikováno v:
A&A 690, A213 (2024)
In the present paper we consider the full nonlocal thermodynamic equilibrium (non-LTE) radiation transfer problem. This formalism allows us to account for deviation from equilibrium distribution of both the radiation field and the massive particles.
Externí odkaz:
http://arxiv.org/abs/2408.12244
Autor:
Bommier, V.
Publikováno v:
A&A 644, A65 (2020)
This paper presents a numerical application of a self-consistent theory of partial redistribution in non-LTE conditions, developed in previous papers of the series. The code was described in a previous paper of this series. However, in that previous
Externí odkaz:
http://arxiv.org/abs/2007.08226
Publikováno v:
A&A 647, A60 (2021)
Aims : We present 24 synoptic maps of solar filaments, in which the average unambiguous magnetic field vectors of 296 prominences were determined with Pic-du-Midi observations between 1974 and 1982. This was the ascending phase of cycle 21. Methods :
Externí odkaz:
http://arxiv.org/abs/2007.08219
Autor:
Kalewicz, T., Bommier, V.
Publikováno v:
A&A 629, A138 (2019)
Magnetic field vector measurements are always ambiguous, that is, two or more field vectors are solutions of the observed polarisation. The aim of the present paper is to solve the ambiguity by comparing the ambiguous field vectors obtained in the sa
Externí odkaz:
http://arxiv.org/abs/1904.01816
Autor:
Bommier, V.
Publikováno v:
A&A 607, A50 (2017)
In previous papers of this series, we presented a formalism able to account for both statistical equilibrium of a multilevel atom and coherent and incoherent scatterings (partial redistribution). aims: This paper provides theoretical expressions of t
Externí odkaz:
http://arxiv.org/abs/1708.05579
Autor:
Janvier, M., Savcheva, A., Pariat, E., Tassev, S., Millholland, S., Bommier, V., McCauley, P., McKillop, S., Dougan, F.
Publikováno v:
A&A 591, A141 (2016)
The standard model for eruptive flares has in the past few years been extended to 3D. It predicts typical J-shaped photospheric footprints of the coronal current layer, forming at similar locations as the Quasi-Separatrix Layers (QSLs). Such a morpho
Externí odkaz:
http://arxiv.org/abs/1604.07241
We present for the first time the evolution of the photospheric electric currents during an eruptive X-class flare, accurately predicted by the standard 3D flare model. We analyze this evolution for the February 15, 2011 flare using HMI/SDO magnetic
Externí odkaz:
http://arxiv.org/abs/1402.2010
Autor:
Peter, H., Abbo, L., Andretta, V., Auchere, F., Bemporad, A., Berrilli, F., Bommier, V., Braukhane, A., Casini, R., Curdt, W., Davila, J., Dittus, H., Fineschi, S., Fludra, A., Gandorfer, A., Griffin, D., Inhester, B., Lagg, A., Degl'Innocenti, E. Landi, Maiwald, V., Sainz, R. Manso, Pillet, V. Martinez, Matthews, S., Moses, D., Parenti, S., Pietarila, A., Quantius, D., Raouafi, N. -E., Raymond, J., Rochus, P., Romberg, O., Schlotterer, M., Schuehle, U., Solanki, S., Spadaro, D., Teriaca, L., Tomczyk, S., Bueno, J. Trujillo, Vial, J. -C.
The magnetic field plays a pivotal role in many fields of Astrophysics. This is especially true for the physics of the solar atmosphere. Measuring the magnetic field in the upper solar atmosphere is crucial to understand the nature of the underlying
Externí odkaz:
http://arxiv.org/abs/1108.5304
The main objective of this paper is to build and compare vector magnetic maps obtained by two spectral polarimeters, i.e. THEMIS/MTR and Hinode SOT/SP, using two inversion codes (UNNOFIT and MELANIE) based on the Milne-Eddington solar atmosphere mode
Externí odkaz:
http://arxiv.org/abs/1002.4355
The physics of the solar chromosphere depends in a crucial way on its magnetic structure. However there are presently very few direct magnetic field diagnostics available for this region. Here we investigate the diagnostic potential of the Hanle effe
Externí odkaz:
http://arxiv.org/abs/0811.1180