NLTE modeling of a small active region filament observed with the VTT

0470401 - ASÚ 2017 RIV DE eng J - Journal Article
Schwartz, P. - Balthasar, H. - Kuckein, C. - Koza, J. - Gömöry, P. - Rybák, J. - Heinzel, Petr - Kučera, A.
NLTE modeling of a small active region filament observed with the VTT.
Astronomische Nachrichten. Roč. 337, č. 10 (2016), s. 1045-1049. ISSN 0004-6337. E-ISSN 1521-3994.
[Dynamic Sun - Exploring the Many Facets of Solar Eruptive Events. Potsdam, 26.10.2015-29.10.2015]
Institutional support: RVO:67985815
Keywords : Sun * filaments * prominences
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 0.916, year: 2016

An active region mini-filament was observed with the Vacuum Tower Telescope (VTT) in Tenerife simultaneously in the He i infrared triplet using the Tenerife Infrared Polarimeter 1 (TIP 1), in H alpha with the TESOS Fabry-Perot interferometer, and in Ca ii 8542 with the VTT spectrograph. The spectropolarimetric data were inverted using the HAZEL code and Ha profiles were modelled by solving a NLTE radiative transfer in a simple isobaric and isothermal 2D slab irradiated both from its bottom and sides from the solar surface. It was found that the mini-filament is composed of horizontal fluxtubes, along which the cool plasma of T similar to 10 000K can flow with very large, even supersonic, velocities.
Permanent Link: http://hdl.handle.net/11104/0268047