Electron Densities in the Solar Corona Measured Simultaneously in the Extreme Ultraviolet and Infrared
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00547837" target="_blank" >RIV/67985815:_____/21:00547837 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/abcd91" target="_blank" >https://doi.org/10.3847/1538-4357/abcd91</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/abcd91" target="_blank" >10.3847/1538-4357/abcd91</a>
Alternative languages
Result language
angličtina
Original language name
Electron Densities in the Solar Corona Measured Simultaneously in the Extreme Ultraviolet and Infrared
Original language description
Accurate measurements of electron density are critical for determination of the plasma properties in the solar corona. We compare the electron densities diagnosed from Fe xiii lines observed by the Extreme-Ultraviolet Imaging Spectrometer (EIS) onboard the Hinode mission with the near-infrared (NIR) measurements provided by the ground-based Coronal Multichannel Polarimeter (CoMP). To do that, the emissivity-ratio method based on all available observed lines of Fe xiii is used for both EIS and CoMP. The EIS diagnostics is further supplemented by the results from Fe xii lines. We find excellent agreement, within 10%, between the electron densities measured from both extreme-ultraviolet and NIR lines. In the five regions selected for detailed analysis, we obtain electron densities of log(N-e [cm(-3)]) = 8.2-8.6. Where available, the background subtraction has a significant impact on the diagnostics, especially on the NIR lines, where the loop contributes less than a quarter of the intensity measured along the line of sight. For the NIR lines, we find that the line center intensities are not affected by stray light within the instrument, and recommend using these for density diagnostics. The measurements of the Fe xiii NIR lines represent a viable method for density diagnostics using ground-based instrumentation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
Result continuities
Project
<a href="/en/project/GA18-09072S" target="_blank" >GA18-09072S: Spectroscopy of non-thermal distributions and non-equilibrium ionization in the solar corona and transition region</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
1538-4357
Volume of the periodical
906
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
118
UT code for WoS article
000607948200001
EID of the result in the Scopus database
2-s2.0-85100289415