Infrared spectroscopy of M dwarfs.
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1978
- DOI:
- 10.1086/156673
- Bibcode:
- 1978ApJ...226..923M
- Keywords:
-
- 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;
- Astrophysics;
- Element Abundances:M Dwarfs;
- Infrared Spectra:M Dwarfs;
- M Dwarfs:Metal Content