Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...276..602g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 276, Jan. 15, 1984, p. 602-620.
Astronomy and Astrophysics
Astrophysics
118
Abundance, Stellar Color, Stellar Luminosity, Stellar Spectrophotometry, Stellar Temperature, White Dwarf Stars, Binary Stars, Color-Color Diagram, Companion Stars, Cool Stars, H Alpha Line, Opacity, Stellar Parallax, Stellar Spectra, Supernovae, Tables (Data)
Scientific paper
Multicolor spectrophotometry of 319 white dwarfs gives magnitudes measured at six wavelengths. The resultant colors permit study of a number of peculiarities of energy distributions, as revealed in color-color diagrams. The major results are presented in a table, which includes luminosities, as deduced from (G-R) colors, by a quadratic interpolation formula based on 66 recent parallaxes. All stars are classified on a new quantitative scheme which both gives a temperature and indicates the major features of atmospheric composition. The color-color diagrams are used to study the distortions of the energy distribution of individual stars. The parallaxes and colors show that the "cosmic dispersion" is near ±0.40 mag and corresponds to a small spread in mass, probably 0.10 - 0.15 M_sun;. Implications of some of these largely empirical findings for the current theoretical interpretation of white dwarfs are briefly discussed.
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