Issue |
Astron. Astrophys. Suppl. Ser.
Volume 126, Number 2, December I 1997
|
|
---|---|---|
Page(s) | 251 - 255 | |
DOI | https://doi.org/10.1051/aas:1997262 | |
Published online | 15 December 1997 |
The precision of spectroscopic luminosity in A-F type stars and the classification of Am stars
Observatoire de Strasbourg, URA 1280 CNRS, 11 rue de l'Université, 67000 Strasbourg, France
Send offprint request to: C. Jaschek, 37 Teso de la Feria 37008 Salamanca, Spain.
Received:
6
January
1997
Accepted:
27
February
1997
We analyze the work of three teams of classifiers providing spectral
classifications in the range of late B-type to early F-type stars. With the
help of a statistical model we derive an accuracy of luminosity
classes for the spectroscopic luminosity class provided by classifiers.
This is sligthly better than one luminosity class, and corresponds, in the
region of the A-type stars, to a precision of about
(absolute)
magnitudes. We do not find differences in the precision of three
series analyzed.
We analyze also the case of Am stars and conclude that the
probability that two independent classifiers agree that a given object is
Am, is of the order of 60%.
Key words: stars: distances / stars: fundamental parameters / stars: HR diagram
© European Southern Observatory (ESO), 1997