Candle_flame_spectra

Flux calibrated spectra of the two regions of the candle flame. The bright region at the top has been fitted with a Planck function (black body) spectrum at 2020K. The lower region is more complex since it contains several different emitting components: a molecular region seen as blue and consisting of emission from CN, CH and C_2 molecules, the lower part of the flame that emits neutral sodium and potassium resonance lines (Na I and K I) and, in the NIR, the glowing tip of the wick. This region has been fitted by a combination of two black body spectra (shown as the pink and blue broad lines) at 1650K and 2700K. The latter does not represent pure thermal emission.

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