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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP209%2F12%2F1652" target="_blank" >GAP209/12/1652: Analýza netermálních distribucí elektronů ve sluneční koróně a přechodové oblasti</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Svazek periodika

807

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

"123/1"-"123/19"

Kód UT WoS článku

000358967000009

EID výsledku v databázi Scopus

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