Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..923m&link_type=abstract
Astrophysical Journal, Part 1, vol. 226, Dec. 15, 1978, p. 923-930.
Astronomy and Astrophysics
Astrophysics
53
Abundance, Astronomical Spectroscopy, Hertzsprung-Russell Diagram, Infrared Spectroscopy, M Stars, Subdwarf Stars, Atomic Spectra, Fourier Transformation, G Stars, High Resolution, Late Stars, Main Sequence Stars, Molecular Spectra, Spectrum Analysis, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
High-resolution Fourier transform spectra are presented for six M dwarfs. The wavelength range is 4000-6600 kaysers at 0.3 kayser resolution. Abundance analysis indicates that the old disk subdwarfs Gliese 15 A and 411 are metal-poor (the M/H concentration ratio = -0.35), while Gliese 205, which lies above the main sequence in the HR diagram, is metal-rich (the M/H concentration = 0.5). This correlation between luminosity and metallicity is used to obtain an upper limit to the abundance dispersion in M dwarfs of the disk population. The similarity between this result and that obtained for G dwarfs suggests a common history of chemical enrichment for these stars.
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