Journal Article

A potential new method for determining the temperature of cool stars

S. Viti, H. R. A. Jones, M. J. Richter, R. J. Barber, J. Tennyson and J. H. Lacy

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 388, issue 3, pages 1305-1313
Published in print August 2008 | ISSN: 0035-8711
Published online July 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13489.x
A potential new method for determining the temperature of cool stars

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We present high-resolution (R= 90 000) mid-infrared spectra of M dwarfs. The mid-infrared region of the spectra of cool low-mass stars contains pure rotational water vapour transitions that may provide us with a new methodology in the determination of the effective temperatures for low-mass stars. We identify and assign water transitions in these spectra and determine how sensitive each pure rotational water transition is to small (25 K) changes in effective temperature. We find that, of the 36 confirmed and assigned pure rotational water transitions, at least 10 should be sensitive enough to be used as temperature indicators.

Keywords: stars: atmospheres; stars: fundamental parameters; stars: low-mass, brown dwarfs; infrared: stars

Journal Article.  3387 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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