The absolute magnitude of the AM stars.
Abstract
The absolute magnitude of the Am stars has been determined by a statistical parallax method based on the principle of maximum likelihood applied to a sample of 165 stars. The calibration of the absolute magnitude has been carried out in terms of different photometric indices from the UBV, usby and sevencolor (Geneva) systems. The results have been compared to the values obtained from Am stars in visual binary systems and in clusters. We showed that barM_{υ} = 1^{m}.2±0^{m}.3 and that consequently the Am stars lie one magnitude above the main sequence, the exact amount depending upon the definition of the MS used.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 January 1981
 Bibcode:
 1981A&A....93..155G
 Keywords:

 A Stars;
 Astrometry;
 Statistical Analysis;
 Stellar Magnitude;
 Binary Stars;
 Calibrating;
 Maximum Likelihood Estimates;
 Star Clusters;
 Stellar Luminosity;
 Stellar Parallax;
 Astronomy