Water vapour in cool dwarf stars

Details Water vapour in cool dwarf stars Water vapour in cool dwarf stars

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000esasp.456..195j&link_type=abstract

ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP

Physics

Iso, Sws, Water Vapour, M Dwarf

Scientific paper

M dwarf spectra beyond 1.35 μm are dominated by water vapour yet terrestrial water vapour makes it notoriously difficult to make accurate measurement of the water vapour bands from ground-based observations. We have used the short wavelength spectrometer on the Infrared Space Observatory (ISO) at four wavelength settings to cover the 2.5 - 3.0 μm region for a range of M dwarfs. The observations show a good match with previous ground-based observations and a reasonable match with the best available synthetic spectra. In particular the synthetic spectra and particularly the ab initio calculations for water vapour on which they hinge now accurately predict the positions of water vapour transitions. However, further work extending the calculation of water vapour to higher energy levels is probably necessary before a detailed match in intensity will be possible.

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