Delta a and Strömgren photometry of stars in the Renson-catalogue of Ap and Am stars

Autor(en)

Hans Michael Maitzen, Rudolf Pressberger, Ernst Paunzen

Abstrakt

We have observed 131 stars of Renson's (1991) catalogue of Ap and Am stars both in the Stromgren & Maitzen's (1976) ?a system as a contribution to the photometric studies of the ?5200 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 ?a. Comparison with already available ?a 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 ?a. This study demonstrates the advantageous performance of a photoelectric photometer with a rapidly rotating filter wheel moving in a stop and go mode.

Organisation(en)

Institut für Astrophysik

Journal

Astronomy & Astrophysics Supplement Series

Band

128

Seiten

573-580

Anzahl der Seiten

8

ISSN

0365-0138

Publikationsdatum

1998

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/delta-a-and-stroemgren-photometry-of-stars-in-the-rensoncatalogue-of-ap-and-am-stars(497fbc49-13fb-439f-91b4-f782168d1ef7).html