Issue |
Astron. Astrophys. Suppl. Ser.
Volume 130, Number 2, June I 1998
|
|
---|---|---|
Page(s) | 215 - 222 | |
DOI | https://doi.org/10.1051/aas:1998226 | |
Published online | 15 June 1998 |
Effective temperatures of Ap stars
1
Central Astronomical Observatory at Pulkovo, St. Petersburg 196140, Russia e-mail: sokolov@gao.pnpi.spb.ru
2
St. Petersburg State University, St. Petersburg, Russia
Send offprint request to: N.A. Sokolov (first address)
Received:
9
September
1997
Accepted:
3
December
1997
A new method of determination of the effective temperatures of
Ap stars is proposed. The method is based on the fact that the
slopes of the energy distribution in the Balmer continuum near
the Balmer jump for "normal" main sequence stars and chemically
peculiar stars with the same are identical.
The effective temperature calibration is based on a sample of
main sequence stars with well known temperatures
(Sokolov 1995). It is shown that the effective temperatures
of Ap stars are derived by this method in good agreement with those derived
by the infrared flux method and by the method of Stepien &
Dominiczak (1989). On the other hand, the comparison of obtained
with
derived from the color
index (B2-G) of Geneva photometry shows a large scatter of the points,
nevertheless there are no systematical differences between two sets
of the data.
Key words: stars: chemically peculiar / stars: fundamental parameters
© European Southern Observatory (ESO), 1998