0469491 - ASÚ 2017 RIV FR eng J - Journal Article
Gunár, Stanislav - Mackay, D. H.
Properties of the prominence magnetic field and plasma distributions as obtained from 3D whole-prominence fine structure modeling.
Astronomy & Astrophysics. Roč. 592, August (2016), A60/1-A60/10. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) GA16-17586S
EU Projects: European Commission(XE) 328138 - COMBINED MHD AND RT
Institutional support: RVO:67985815
Keywords : Sun * filaments * prominences
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.014, year: 2016 ; AIS: 1.581, rok: 2016
DOI: https://doi.org/10.1051/0004-6361/201527704

We analyze distributions of the magnetic field strength and prominence plasma (temperature, pressure, plasma beta, and mass) using the 3D whole-prominence fine structure model. We show that in the modeled prominence, the variations of the magnetic field strength and its orientation are insignificant on scales comparable to the smallest dimensions of the observed prominence fine structures. We also show the ability of the 3D whole-prominence fine structure model to reveal the distribution of the prominence plasma with respect to its temperature within the prominence volume. This provides new insights into the composition of the prominence-corona transition region. We further demonstrate that the values of the plasma beta are small throughout the majority of the modeled prominences when realistic photospheric magnetic flux distributions and prominence plasma parameters are assumed. While this is generally true, we also find that in the region with the deepest magnetic dips, the plasma beta may increase towards unity. Finally, we show that the mass of the modeled prominence plasma is in good agreement with the mass of observed non-eruptive prominences.
Permanent Link: http://hdl.handle.net/11104/0267273