Hot prominence detected in the core of a coronal mass ejection III. Plasma filling factor from UVCS Lyman-alpha and Lyman-beta observations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00495470" target="_blank" >RIV/67985815:_____/18:00495470 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201832792" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201832792</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201832792" target="_blank" >10.1051/0004-6361/201832792</a>

Result language

angličtina

Original language name

Hot prominence detected in the core of a coronal mass ejection III. Plasma filling factor from UVCS Lyman-alpha and Lyman-beta observations

Original language description

We explore two methods for measuring this factor along the line of sight. They are based on a combination of visible-light and ultraviolet spectroscopic observations. The resulting filling factors are consistent with the model in both prominence points when the radiative and collisional components of the total intensity of the hydrogen lines are separated using the Ly alpha and Ly beta line intensities, which is required to estimate the filling factor. The exploration of the parameter space shows that the results are weakly sensitive to the plasma flow velocity, but depend more strongly on the assumed kinetic temperatures. The combination of visible-light and ultraviolet Ly alpha and Ly beta data can be used to approximately estimate the line-of-sight geometrical filling factor in erupting prominences, but the proposed technique, which is model dependent, is reliable only for emission that is optically thin in the lines considered, a condition that is not in general representative of prominence plasma.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA16-18495S" target="_blank" >GA16-18495S: Advanced solar science with IRIS</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

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Volume of the periodical

617

Issue of the periodical within the volume

September

Country of publishing house

FR - FRANCE

Number of pages

9

Pages from-to

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UT code for WoS article

000444605000001

EID of the result in the Scopus database

2-s2.0-85053543946