POSTER PAPER 5.15
A Comparison of Water Vapour Line Lists
Hugh R.A. Jones, Yakiv Pavlenko, Serena Viti, Jonathan Tennyson
Institute: Astrophysics Research Institute, Liverpool John Moores University
Institute: National Astronomical Observatory of Ukraine
Institute: University College London
Contact Email: hraj@astro.livjm.ac.uk
Abstract:
M dwarf spectra, at wavelengths beyond 1.35 micrometers,
are dominated by water vapour yet
terrestrial water vapour makes it notoriously difficult to make accurate
measurement from ground-based observations.
We have used the short wavelength spectrometer on the Infrared Space
Observatory to obtain the
2.5--3.0 micrometer region.
The observations show a good match
with
synthetic spectra based on the Partridge & Schwenke (1997) line list
though not with the SCAN (Jorgensen et al. 2001) line list.
Nonetheless, the Partridge & Schwenke calculations for water vapour lines
still need to be extended to higher energy levels with good
convergence for reliable modelling of hot water vapour.
Then water bands can assume their natural role as the primary tool
for the spectroscopic analysis of M stars.
Index Keywords: Water; M Dwarfs; Model Atmospheres
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Manuscript submitted: 2001-Aug-28
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.