| Autor: |
Prochazka, Ondrej, Milligan, Ryan, Allred, Joel, Kowalski, Adam, Mathioudakis, Michail |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Prochazka, O, Milligan, R, Allred, J, Kowalski, A & Mathioudakis, M 2016, ' Suppression of Hydrogen Emission in a White-light Solar Flare ' Solar Physics Division Meeting 2016, Boulder, United States, 31/05/2016-03/06/2016, . https://doi.org/10.13140/RG.2.1.3294.8722 |
| Popis: |
We present an analysis of an X-class flare that occurred on 11 June 2014 in active region NOAA 12087 using a newly developed high cadence ImageSelector operated by Astronomical Institute in Ondrejov, Czech Republic. This instrument provides spectra in the 350 - 440 nm wavelength range, whichcovers the higher order Balmer lines as well as the Balmer jump at 364 nm. However, no detectable increase in these emissions were detected duringthe flare, and support observations from SDO/EVE MEGS-B also show that the Lyman line series and recombination continuum were also suppressed,particularly when compared to an M-class flare that occurred an hour earlier, and two other X-class flares on the preceding day. The X-class flare underinvestigation also showed strong white light emission in SDO/HMI data, as well as an extremely hard electron spectrum ( 3.6), and -ray emission,from RHESSI data. This unique combination of datasets allows us to conclude that the white light emission from this flare corresponds to a black bodyheated by high-energy electrons (and/or ions), as opposed to optical chromospheric emission from hydrogen. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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