Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ssrv...43..211v&link_type=abstract
Space Science Reviews (ISSN 0038-6308), vol. 43, April 1986, p. 211-327. NSF-supported research.
Astronomy and Astrophysics
Astronomy
12
Astrometry, Companion Stars, Main Sequence Stars, Celestial Sphere, Distance, Double Stars, Dwarf Stars, Extrasolar Planets, Kepler Laws, Mass To Light Ratios, Orbit Perturbation, Solar System, Stellar Motions, Stellar Parallax
Scientific paper
The smaller the mass of a star, the lower its central temperature and the lower its luminosity. The zero-age Main Sequence is thus explained down to its lower, red dwarf section; there is, however, a critical mass value below which the central temperature is too low to permit conventional nuclear energy production, and the resulting objects are designated substellar, black, brown, or even 'dark red' stars. The present consideration of the dark companions of stars gives attention to visible and invisible dark dwarfs, as well as to the stars Sirius and Procyon, the planets Neptune and Pluto, spectroscopic, photometric, and eclipsing companion stars, the serendipitously discovered cases of Ross 614 and VW Cephei C, and astrometric study results for Barnard's star.
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