On measurements of the Balmer continuum flux in a solar flare: Analysis of pre-flare and flare pulsations

A new ground based device for the measurement of the Balmer continuum flux in solar flares was recently developed and installed at the Ondřejov Observatory. We observed an X1 solar flare on 2014 June 11 during its pre‐flare and impulsive phases using a wide band spectrometer with a cadence of 1 s. T...

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Published inAstronomische Nachrichten Vol. 337; no. 10; pp. 1078 - 1081
Main Authors Zapiór, M., Kotrč, P., Oliver, R., Procházka, O., Heinzel, P.
Format Journal Article
LanguageEnglish
Published Berlin WILEY-VCH Verlag 01.11.2016
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects
Band spectra
Continuums
Damping
Flux
Oscillations
Phases
Pulsation
Solar flares
Solar physics
Sun: activity
Sun: chromosphere
Sun: flares
Sun: oscillations
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Summary:A new ground based device for the measurement of the Balmer continuum flux in solar flares was recently developed and installed at the Ondřejov Observatory. We observed an X1 solar flare on 2014 June 11 during its pre‐flare and impulsive phases using a wide band spectrometer with a cadence of 1 s. The Ensemble Empirical Mode Decomposition (EEMD) of the registered signal was performed. We found damped oscillations with a period of 609 s and damping time of 1478 s. Shorter periods of about 30–120 s were found during the pre‐flare and impulsive phases, but they might be of non‐flare origin
Bibliography:EC Program FP7/2007-2013 under the F-CHROMA agreement No. 606862
Grant from the Czech Funding Agency (GACR) No. P209/12/1652
istex:7D39A5A7D0A0AF95D0234E10C8A68AF677AE8D81
ArticleID:ASNA201612436
European Commissions FP7 Capacities Programme under the Grant Agreement 312495
ark:/67375/WNG-FJC6GLW1-P
MINECO and FEDER funds through project AYA2014-54485-P
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201612436