New light on faint stars. V - Infrared photometry and the H-R diagram for very low mass dwarfs

Details New light on faint stars. V - Infrared photometry and the H-R diagram for very low mass dwarfs New light on faint stars. V - Infrared photometry and the H-R diagram for very low mass dwarfs

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.206...19r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 206, Jan. 1, 1984, p. 19-35.

Astronomy and Astrophysics

Astronomy

94

Dwarf Stars, Hertzsprung-Russell Diagram, Infrared Astronomy, Infrared Photometry, Stellar Luminosity, Stellar Spectrophotometry, Stellar Temperature, Disk Galaxies, Halos, M Stars, Opacity, Stellar Color, Stellar Mass

Scientific paper

New optical and infrared photometry of a large sample of very low mass dwarfs, including three of the five intrinsically faintest stars yet discovered, are presented. These data are used to recalibrate the stellar effective temperature sequence below 3500 K, and to reinvestigate the stellar population structure in the H-R (log T(EFF) versus log luminosity) and J-H/H-K diagrams. All known low mass dwarfs lie near the expected hydrogen burning main sequence in the H-R diagram. No evidence is found for any representatives of a 'black dwarf' population, with masses below the theoretical hydrogen burning limit. The dispersion in the infrared two-color diagram is dominated by metallicity variations, and is only weakly correlated with stellar kinematic populations.

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