Absolute magnitudes and other basic parameters of O and B stars

Details Absolute magnitudes and other basic parameters of O and B stars Absolute magnitudes and other basic parameters of O and B stars

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.177..101d&link_type=abstract

In ESA The Sci. Aspects of the Hipparcos Space Astrometry Mission p 101-104 (SEE N82-30146 20-88)

Astronomy and Astrophysics

Astronomy

19

B Stars, Esa Satellites, O Stars, Stellar Magnitude, Astrometry, Balmer Series, Bolometers, European Space Programs, Stellar Parallax, Stellar Temperature

Scientific paper

The parameters lambda 1 and D of the BCD system are calibrated in effective temperature and bolometric magnitude for O and B stars. Lambda is a parameter linked to the position of the Balmer discontinuity; D is the value of this discontinuity. Verification and/or improvements expected from Hipparcos parallaxes are discussed. The difference between the bolometric and visual absolute magnitude given by these calibrations is compared to the bolometric correction deduced from model calculations. General agreement is good except for late type B giants. For these, a number of Hipparcos parallaxes will be obtained with a precision large enough to find out the origin of this anomaly.

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