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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - 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)

Project

<a href="/en/project/GA16-18495S" target="_blank" >GA16-18495S: Advanced solar science with IRIS</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Astrophysical Journal Letters

ISSN

2041-8213

e-ISSN

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Volume of the periodical

867

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

000449400000003

EID of the result in the Scopus database

2-s2.0-85056727649