Absolute Magnitudes of Be Stars Based on Hipparcos Parallaxes |
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| Authors: | P Zhang C Q Liu P S Chen |
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| Institution: | (1) National Astronomical Observatories/Yunnan Observatory and Graduate School, Chinese Academy of Sciences, Kunming, Yunnan, 650091, China;(2) Cosmic Ray Institute, Yunnan University, Kunming, Yunnan, 650091, China;(3) School of Mathematics and Physics, Yunnan University, Kunming, Yunnan, 650091, China |
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| Abstract: | The absolute visual magnitudes of 457 Be stars are determined from Hipparcos parallaxes, subsequently the mean absolute visual
magnitudes of Be stars for luminosity classes III, IV and V are obtained. The new Mv calibration is compared with existing
calibrations. It is found that Be stars are generally brighter than B stars of the corresponding spectral types, and that
there is no direct correlation between absolute magnitudes and the stellar rotational velocity, these results are in agreement
with some earlier results. A new and interesting result is that there is no direct correlation between near infrared excess
and absolute visual magnitudes for Be stars. Moreover, possible biases, such as the Malmquist bias and the Lutz–Kelker bias,
are also discussed. |
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| Keywords: | Absolute magnitude Be stars Stellar rotation Infrared excess |
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