Spectrum of hot water in the 4750-13000 cm-1 wavenumber range (0.769-2.1μm)

Astronomy and Astrophysics – Astronomy

Scientific paper

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Line: Identification, Molecular Data, Sunspots, Infrared: Stars

Scientific paper

The high resolution laboratory spectrum of hot water vapour has been recorded in the 500-13000 cm-1 wavenumber range and we report on the analysis of the 4750-13000 cm-1 (0.769-2.1 μm) portion. The emission spectrum was recorded using an oxy-acetylene welding torch and a Fourier transform spectrometer. Line assignments in the laboratory spectrum as well as in an absorption spectrum of a sunspot umbra were made with the help of the BT2 line-list. Our torch spectrum is the first laboratory observation of the 9300 Å `steam bands' seen in M-stars and brown dwarfs.

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