Balmer continuum enhancement detected in a mini flare observed with IRIS

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548090" target="_blank" >RIV/67985815:_____/21:00548090 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0324205" target="_blank" >http://hdl.handle.net/11104/0324205</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202141172" target="_blank" >10.1051/0004-6361/202141172</a>

Result language
angličtina
Original language name
Balmer continuum enhancement detected in a mini flare observed with IRIS
Original language description
The aim of the paper is to distinguish between these two mechanisms for the excess of the Balmer continuum observed in a flare. The favorable argument of a relation between the Balmer continuum excess and the HXR emission is that there is a good time coincidence between them. In addition, the shape of the maximum brightness in the 2832 SJIs, which is mainly due to this Balmer continuum excess, is similar to that of the Fermi/GBM light curve. The electron-beam flux estimated from Fermi/GBM between 10(9) and 10(10) erg s(-1) cm(-2) is consistent with the beam flux required in non-LTE radiative transfer models to obtain the excess of Balmer continuum emission observed in this IRIS spectra. Conclusions. The low-energy input by nonthermal electrons above 20 keV is sufficient to produce the enhancement in the Balmer continuum emission. This could be explained by the topology of the reconnection site. The reconnection starts in a tiny bald-patch region, which is transformed dynamically into an X-point current sheet. The size of the interacting region would be below the spatial resolution of the instrument.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA19-09489S" target="_blank" >GA19-09489S: Advanced modelling of solar flare processes and their chromospheric emission</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)