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An In Situ Interplanetary “U-burst”: Observation and Results

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F20%3A00539563" target="_blank" >RIV/68378289:_____/20:00539563 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://arxiv.org/pdf/1910.04306" target="_blank" >http://arxiv.org/pdf/1910.04306</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3847/1538-4357/ab96c3" target="_blank" >10.3847/1538-4357/ab96c3</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    An In Situ Interplanetary “U-burst”: Observation and Results

  • Popis výsledku v původním jazyce

    We report and examine the observation of an unusual and rare in situ electron observation associated with a solar type III radio burst on 1996 December 24. This radio event was accompanied by high-energy electrons, measured by the Solid State Telescope on board the Wind spacecraft. The type III radio emission started at 13:10 UTC and was associated with a C2.1 GOES-class flare whose maximum was at 13:11 UTC and hosted by the active region NOAA 8007/8004, located on the west limb at N05 degrees W74 degrees/N06 degrees W85 degrees. During this event, the observation of an electron energy distribution likely to be associated with the radio emission was registered. The electrons arrive at the spacecraft predominantly from the antisolar direction, suggesting that their general motion is sunward along a closed magnetic field line. Leblanc et al. propose a model in which energetic electrons are injected into a coronal flux tube at one of its footpoints, releasing standard type-III emission. As the magnetic field then directs them back toward the magnetic-conjugate footpoint of the first, the electrons release subsequent emission whose radio profile is a quasi-time reversal of the standard. We have constructed a cylindrical flux rope facsimile of this scenario that reproduces the U-burst profiles. We also report observational features indicating a secondary electron energy distribution and propose a scenario that explains this feature.

  • Název v anglickém jazyce

    An In Situ Interplanetary “U-burst”: Observation and Results

  • Popis výsledku anglicky

    We report and examine the observation of an unusual and rare in situ electron observation associated with a solar type III radio burst on 1996 December 24. This radio event was accompanied by high-energy electrons, measured by the Solid State Telescope on board the Wind spacecraft. The type III radio emission started at 13:10 UTC and was associated with a C2.1 GOES-class flare whose maximum was at 13:11 UTC and hosted by the active region NOAA 8007/8004, located on the west limb at N05 degrees W74 degrees/N06 degrees W85 degrees. During this event, the observation of an electron energy distribution likely to be associated with the radio emission was registered. The electrons arrive at the spacecraft predominantly from the antisolar direction, suggesting that their general motion is sunward along a closed magnetic field line. Leblanc et al. propose a model in which energetic electrons are injected into a coronal flux tube at one of its footpoints, releasing standard type-III emission. As the magnetic field then directs them back toward the magnetic-conjugate footpoint of the first, the electrons release subsequent emission whose radio profile is a quasi-time reversal of the standard. We have constructed a cylindrical flux rope facsimile of this scenario that reproduces the U-burst profiles. We also report observational features indicating a secondary electron energy distribution and propose a scenario that explains this feature.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10305 - Fluids and plasma physics (including surface physics)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/GJ17-06818Y" target="_blank" >GJ17-06818Y: Heliosférická pozorování s využitím k předpovídání kosmického počasí</a><br>

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Astrophysical Journal

  • ISSN

    0004-637X

  • e-ISSN

  • Svazek periodika

    897

  • Číslo periodika v rámci svazku

    2

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    7

  • Strana od-do

    170

  • Kód UT WoS článku

    000553808800001

  • EID výsledku v databázi Scopus

    2-s2.0-85091459106