Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..177s&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Jan. 1, 1980, p. 177-185. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
65
Stellar Atmospheres, Stellar Mass Ejection, Stellar Spectrophotometry, White Dwarf Stars, Atmospheric Models, Gravitational Effects, Optical Scanners, Radii, Stellar Temperature
Scientific paper
Newly calculated model atmospheres, including both the effects of Lyman and Balmer line blanketing and the effects of convection, are used to determine the surface gravities of white-dwarf stars by the use of the separation of stars with different surface gravities in the Stromgren and multichannel two-color diagrams. Comparison of all available investigations of white-dwarf masses shows that they are internally consistent with the possible exception of masses derived from gravitational redshifts, where a slight, marginally significant discrepancy may exist. The weighted mean of all mass determinations is 0.75 solar mass, allowing for selection effects. The 1 sigma range of white-dwarf masses extends from 0.5 solar mass to 1.0 solar mass; no evidence is found for a smaller mass range.
Sass C. A.
Shipman Harry L.
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