The metallic hydride dwarfs
Abstract
The properties of the M dwarfs have been investigated by spectroscopic and photometric observations of over 150 red, high proper motion stars. Most of these stars have red magnitudes fainter than 12 magnitude. The brightest stars are mainly old disk (OD) M dwarfs with low velocity and probable solar metallicity whose spectroscopic and photometric properties are closely related. The fainter stars are generally all high velocity stars i.e., kinematically halo stars, but they separate into two spectroscopically distinct groups. Some typical spectra taken with three different detectors covering different wavelength intervals are shown. The outstanding features are the strong hydride bands and the strong lines of Fe I, Ca I, Na I, and K I. Attention is also given to colors, absolute magnitudes, and spectral peculiarities.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1982
- DOI:
- Bibcode:
- 1982PASA....4..417B
- Keywords:
-
- Dwarf Stars;
- M Stars;
- Metal Hydrides;
- Stellar Spectrophotometry;
- Abundance;
- Calcium Compounds;
- Carbon Compounds;
- Magnesium Compounds;
- Stellar Color;
- Stellar Magnitude;
- Stellar Spectra;
- Titanium Oxides;
- Astrophysics