Issue |
Astron. Astrophys. Suppl. Ser.
Volume 128, Number 3, March II 1998
|
|
---|---|---|
Page(s) | 573 - 580 | |
DOI | https://doi.org/10.1051/aas:1998164 | |
Published online | 15 March 1998 |
and Strömgren photometry of stars in the Renson-catalogue
of Ap and Am stars*
Institut für Astronomie der Universität Wien, Türkenschanzstr. 17, A-1180 Wien, Austria e-mail: surname@astro.ast.univie.ac.at
Send offprint request to: H.M. Maitzen
Received:
17
July
1997
Accepted:
3
September
1997
We have observed 131 stars of of Renson's (1991) catalogue of Ap
and Am stars both in the Strömgren & Maitzen's (1976) system as a
contribution to the photometric studies of the
broad band
flux depression feature in chemically peculiar stars. With few exceptions
the probability grouping of Renson for membership in the CP2 group of
peculiar stars is nicely reflected by peculiar values of
.
Comparison with already available
values yields slightly larger values
due to a minor shift in the filter g1 sampling the depression.
As found by Maitzen & Vogt (1983) the Geneva system
peculiarity parameters correlate well with
. This study
demonstrates the advantageous performance of a photoelectric photometer with
a rapidly rotating filter wheel moving in a stop and go mode.
Key words: stars; chemically peculiar / stars; early type
© European Southern Observatory (ESO), 1998