Ultra-high-resolution spectroscopic measurements (R approximate to 10(7)) of water vapor and silicon monoxide in sunspots are presented. Observations were performed using the Cologne Tunable Heterodyne Infrared Spectrometer (THIS) at the McMath-Pierce Solar Observatory. Mid-infrared molecular absorption lines around 10 mu m were recorded and resolved in full detail. The linewidth and shape can thus be determined with high precision and were used to calculate kinetic temperatures which are much higher than the physical temperatures of the sunspot.
- TUNABLE DIODE-LASER
- HETERODYNE SPECTROMETER