Other
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100...82g&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Jan. 1988, p. 82-89.
Other
3
Broadband, Line Spectra, Stellar Color, Stellar Spectrophotometry, Ubv Spectra, White Dwarf Stars, Black Body Radiation, Stellar Atmospheres, Stellar Composition, Stellar Luminosity, Stellar Temperature
Scientific paper
The published braod-band UBV and multichannel spectrophotometry is correlated for the white dwarfs to provide the nonlinear color-color transformations between these systems. The hydrogen lines and continuum produce a bifurcation separating hydrogen-dominated and helium-dominated atmospheres in color-color diagrams, and account, in part, for the Eggen-Greenstein two sequences. The UBV color-luminosity diagram also is split over a wide range of temperatures; (U-V)0 is approximately calibrated by temperature for the two dominant composition types. Mapping of M(V), (U-V)0 shows that most He-atmosphere in the steep dependence of M(V) on (U-V)0 from 8000 K to 13,000 K; (U-V)0 is a poor luminosity indicator in that range of effective temperature. Otherwise, good UBV photometry proves quite useful for the study of white dwarfs.
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