Imaging and Spectroscopic Observations of a Transient Coronal Loop: Evidence for the Non-Maxwellian K Distributions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00450485" target="_blank" >RIV/67985815:_____/15:00450485 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0004-637X/807/2/123" target="_blank" >http://dx.doi.org/10.1088/0004-637X/807/2/123</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-637X/807/2/123" target="_blank" >10.1088/0004-637X/807/2/123</a>

Result language

angličtina

Original language name

Imaging and Spectroscopic Observations of a Transient Coronal Loop: Evidence for the Non-Maxwellian K Distributions

Original language description

We report on the Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) and Hinode/EUV Imaging Spectrograph (EIS) observations of a transient coronal loop. We use the AIA data to study the evolution of the loop, as well as to perform the differential emission measure (DEM) diagnostics as a function of kappa. The Fe XI-Fe XIII lines observed by EIS are used to perform the diagnostics of electron density and subsequently the diagnostics of kappa. Using ratios involving the Fe XI 257.772 angstrom self-blend, we diagnose kappa less than or similar to 2, i.e., an extremely non-Maxwellian distribution. Using the predicted Fe line intensities derived from the DEMs as a function of kappa, we show that, with decreasing kappa, all combinations of ratios of line intensities converge to the observed values, confirming the diagnosed kappa less than or similar to 2. These results represent the first positive diagnostics of kappa-distributions in the solar corona despite the limitations impose

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GAP209%2F12%2F1652" target="_blank" >GAP209/12/1652: Analysis of the non-thermal electron distribution in the solar corona and transition region</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

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Volume of the periodical

807

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

"123/1"-"123/19"

UT code for WoS article

000358967000009

EID of the result in the Scopus database

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