The M dwarf problem: Fe and Ti abundances in a volume-limited sample of M dwarf stars
Abstract
We report iron and titanium abundance measurements from high-resolution spectra in a volume-limited sample of 106 M0 and M0.5 dwarf stars. The sample includes stars north of the celestial equator and closer than 29 parsecs. The results imply that there is an M dwarf problem similar to the previously known G dwarf problem, in that the fraction of low-metallicity M dwarfs is not large enough to fit simple closed-box models of Galactic chemical evolution. This volume-limited sample avoids many of the statistical uncertainties present in a previous study using a brightness-limited sample of M dwarf stars.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 2020
- DOI:
- 10.1093/mnras/staa878
- arXiv:
- arXiv:2003.11447
- Bibcode:
- 2020MNRAS.494.2718W
- Keywords:
-
- stars: abundances;
- stars: late-type;
- stars: statistics;
- Galaxy: abundances;
- Galaxy: evolution;
- Galaxy: stellar content;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 10 pages, 3 figures. Accepted for publication in MNRAS. Corrected typos in Abstract