Line formation of He I D3 and He I 10 830 Å in a small-scale reconnection event

Aims. We aim to explain line formation of He I D3 and 10830 {\AA} in small-scale reconnection events. Methods. make use a simulated Ellerman bomb (EB), present Bifrost-generated radiative Magnetohydrodynamics (rMHD) snapshot. The resulting \AA\ intensities are synthesized 3D using the non-LTE Multi3D code. compare synthetic helium spectra with observed SST/TRIPPEL raster scans EBs D3. Results. Emission is formed thin shell around EB at height $\sim 0.8$ Mm while absorption above 4$ Mm. which emission corresponds lower boundary EB, where temperature increases rapidly from $6\cdot 10^3$ K $10^6$ K. opacity generated via photoionization-recombination driven by EUV radiation that locally temperatures range $2\cdot 10^4 - 2\cdot 10^6$ electron densities between $10^{11}$ $10^{13}$ cm$^{-3}$. signals result coupling local conditions $7\cdot $10^4$ ranging 10^{12}$ Hence, both strong as well thermal processes play role EB/UV burst we studied. Conclusions. In conclusion, signatures an indicator least 10^4$ this case high