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  Determination of the physical properties of an erupting prominence from SOHO/LASCO and UVCS observations

Susino, R., Bemporad, A., Heinzel, P., Jejčič, S., Anzer, U., & Dzifčáková, E. (2019). Determination of the physical properties of an erupting prominence from SOHO/LASCO and UVCS observations. Nuovo Cimento C - Colloquita and Communications in Physics, 42(1): 37. doi:10.1393/ncc/i2019-19037-6.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-48E2-C Version Permalink: http://hdl.handle.net/21.11116/0000-0004-48E3-B
Genre: Journal Article

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Susino, R., Author
Bemporad, A., Author
Heinzel, P., Author
Jejčič, S., Author
Anzer, U.1, Author              
Dzifčáková, E., Author
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1Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              

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 Abstract: We studied the physical conditions of an erupting prominence observed in the core of a coronal mass ejection, using combination of SOHO/LASCOC2 visible-light images and SOHO/UVCS ultraviolet data. Measured intensities and profiles of the neutral-hydrogen Lyman-α and Lyman-β lines and the 977 ˚A C iii line were used together with the visible-light brightness to derive the geometrical and physical parameters of the prominence, such as the line-of-sight apparent thickness, electron column density, kinetic temperature, and microturbolent velocity. These parameters were used to constrain a non-LTE (i.e., out of local thermodynamic equilibrium) radiative-transfer model of the prominence that provides the effective thickness, electron density, and flow velocity, in a sample of points selected along the prominence. The prominence can be described as a hot structure with low electron density and very low gas pressure compared to typical quiescent prominences. Intensities of the hydrogen lines were also used for a detailed determination of the plasma line-of-sight filling factor, in the two prominence points where simultaneous and cospatial LASCO-C2 and UVCS observations were available.

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 Dates: 2019-06-12
 Publication Status: Published online
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 Rev. Method: -
 Identifiers: DOI: 10.1393/ncc/i2019-19037-6
Other: LOCALID: 3138759
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Title: Nuovo Cimento C - Colloquita and Communications in Physics
Source Genre: Journal
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Publ. Info: Bologna, Italy : Società Italiana di Fisica
Pages: - Volume / Issue: 42 (1) Sequence Number: 37 Start / End Page: - Identifier: ISSN: 2037-4909
CoNE: https://pure.mpg.de/cone/journals/resource/2037-4909