Proceedings of the Japan Academy, Series B
Online ISSN : 1349-2896
Print ISSN : 0386-2208
Identification of FeH Lines in M, S and C Stars
Masanori HIRAIKayo CHINAMI
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1992 Volume 68 Issue 1 Pages 4-8

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Abstract

Using recent laboratory data of FeH molecular lines we attempt to identify the FeH absorption lines in the one-micron spectral region of late type stars, M dwarfs, M giants, S and C stars. The λ9910 absorption features in the spectrum of R Gem among the observed cool stars are identified as the FeH (0, 0) band lines. Results of our identifications are interpreted in view of the variation of C/O ratio in cool stars based on dissociation equilibrium theory. From our conclusion the appearances of absorption lines due to the metallic hydrides are discussed for cool stars.

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