First Detection of Solar Flare Emission in Mid-ultraviolet Balmer Continuum

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00497530" target="_blank" >RIV/67985815:_____/18:00497530 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3847/2041-8213/aaeace" target="_blank" >http://dx.doi.org/10.3847/2041-8213/aaeace</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/aaeace" target="_blank" >10.3847/2041-8213/aaeace</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First Detection of Solar Flare Emission in Mid-ultraviolet Balmer Continuum

Popis výsledku v původním jazyce

We present the first detection of solar flare emission at mid-ultraviolet wavelengths around 2000 angstrom by the channel 2 of the Large-Yield RAdiometer (LYRA) on board the PRoject for OnBoard Autonomy 2 mission. The flare (SOL20170906) was also observed in the channel 1 of LYRA centered at the H I Ly alpha line at 1216 angstrom, showing a clear non-thermal profile in both channels. The flare radiation in channel 2 is consistent with the hydrogen Balmer continuum emission produced by an optically thin chromospheric slab heated up to 10,000 K. Simultaneous observations in channels 1 and 2 allow the separation of the line emission (primarily from the Lya line) from the Balmer continuum emission. Together with the recent detection of the Balmer continuum emission in the near-ultraviolet by the Interface Region Imaging Spectrometer, the LYRA observations strengthen the interpretation of broadband flare emission as the hydrogen recombination continua originating in the chromosphere.

Název v anglickém jazyce

First Detection of Solar Flare Emission in Mid-ultraviolet Balmer Continuum

Popis výsledku anglicky

We present the first detection of solar flare emission at mid-ultraviolet wavelengths around 2000 angstrom by the channel 2 of the Large-Yield RAdiometer (LYRA) on board the PRoject for OnBoard Autonomy 2 mission. The flare (SOL20170906) was also observed in the channel 1 of LYRA centered at the H I Ly alpha line at 1216 angstrom, showing a clear non-thermal profile in both channels. The flare radiation in channel 2 is consistent with the hydrogen Balmer continuum emission produced by an optically thin chromospheric slab heated up to 10,000 K. Simultaneous observations in channels 1 and 2 allow the separation of the line emission (primarily from the Lya line) from the Balmer continuum emission. Together with the recent detection of the Balmer continuum emission in the near-ultraviolet by the Interface Region Imaging Spectrometer, the LYRA observations strengthen the interpretation of broadband flare emission as the hydrogen recombination continua originating in the chromosphere.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA16-18495S" target="_blank" >GA16-18495S: Pokročilý výzkum Slunce se satelitem IRIS</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal Letters

ISSN

2041-8213

e-ISSN

—

Svazek periodika

867

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000449400000003

EID výsledku v databázi Scopus

2-s2.0-85056727649