CORONAS-F observation of gamma-ray emission from the solar flare on 2003 October 29

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00477356" target="_blank" >RIV/61389005:_____/17:00477356 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.newast.2017.05.002" target="_blank" >http://dx.doi.org/10.1016/j.newast.2017.05.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.newast.2017.05.002" target="_blank" >10.1016/j.newast.2017.05.002</a>

Result language

angličtina

Original language name

CORONAS-F observation of gamma-ray emission from the solar flare on 2003 October 29

Original language description

Appreciable hard X-ray (HXR) and gamma-ray emissions in the 0.04-150 MeV energy range associated with the 2003 October 29 solar flare (X10/3B) were observed at 20:38-20:58 UT by the SONG instrument onboard the CORONAS-F mission. To restore flare gamma-ray spectra we fitted the SONG energy loss spectra with a three-component model of the incident spectrum: (1) a power law in energy, assumed to be due to electron bremsstrahlung, (2) a broad continuum produced by prompt nuclear de-excitation gamma-lines, and (3) a broad gamma-line generated from pion-decay. We also restored spectra from the RHESSI data, compared them with the SONG spectra and found a reasonable agreement between these spectra in the 0.1-10 MeV energy range. The pion-decay emission was observed from 20:44:20 UT and had its maximum at 20:48-20:51 UT. The power-law spectral index of accelerated protons estimated from the ratio between intensities of different components of gamma rays changed with time. The hardest spectrum with a power-law index S= -3.5 - 3.6 was observed at 20:48-20:51 UT. Time histories of the pion-decay emission and proton spectrum were compared with changes of the locations of flare energy release as shown by RHESSI hard X-ray images and remote and remote Hot brightenings. An apparent temporal correlation between processes of particle acceleration and restructuring of flare magnetic field was found. In particular, the protons were accelerated to subrelativistic energies after radical change of the character of footpoint motion from a converging motion to a separation motion.

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

10509 - Meteorology and atmospheric sciences

Project

<a href="/en/project/EF15_003%2F0000481" target="_blank" >EF15_003/0000481: Research Center of Cosmic Rays and Radiation Events in the Atmosphere</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

New Astronomy

ISSN

1384-1076

e-ISSN

—

Volume of the periodical

56

Issue of the periodical within the volume

OCT

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

102-112

UT code for WoS article

000404504300014

EID of the result in the Scopus database

2-s2.0-85019396446