Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....92..171s&link_type=abstract
Astronomy and Astrophysics, vol. 92, no. 1-2, Dec. 1980, p. 171-174. Research supported by the Polska Akademia Nauk and Oesterr
Astronomy and Astrophysics
Astrophysics
14
A Stars, Magnetic Stars, Stellar Atmospheres, Stellar Temperature, Ubv Spectra, Hot Stars, Stellar Models, Stellar Spectrophotometry
Scientific paper
UBV data for Ap stars at a distance less than 100 pc from the sun show that hotter stars lie on or close to the main sequence in the two-color diagram, but that stars with B-V not less than +0.05 lie below it. This behavior is confirmed by model atmospheres of standard peculiar and individual peculiar stars. It is shown that the unreddened B-V of an Ap star can be used to find the effective temperature from a normal relation if it is within the range +0.02 to -0.08. For other stars individual blanketing corrections are necessary. The blanketing corrections to both color indices are too small to explain observed light variations of many stars by variable blanketing only; other mechanisms appear to be necessary.
Muthsam H.
Stepien Kazimierz
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