Delta a and Strömgren photometry of stars in the Renson-catalogue of Ap and Am stars
- Author(s)
- Hans Michael Maitzen, Rudolf Pressberger, Ernst Paunzen
- Abstract
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(s)
- Department of Astrophysics
- Journal
- Astronomy & Astrophysics Supplement Series
- Volume
- 128
- Pages
- 573-580
- No. of pages
- 8
- ISSN
- 0365-0138
- Publication date
- 1998
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/delta-a-and-stroemgren-photometry-of-stars-in-the-rensoncatalogue-of-ap-and-am-stars(497fbc49-13fb-439f-91b4-f782168d1ef7).html