New variable stars in open clusters I. Methods and results for 20 open clusters

Autor(en)

Ernst Paunzen, Konstanze Zwintz, Hans Michael Maitzen, Olga Pintado, Monika Rode-Paunzen

Abstrakt

We present high precision CCD photometry of 1791 objects in 20 open clusters with an age of 10 Myrto 1 Gyr. These observations were performed within the ?a photometric system which is primarily used to detect chemically peculiar stars of the upper main sequence. Time bases range from 30 min up to 60 days with data from several nights. We describe the time series analysis reaching a detection limit of down to 0.006 mag for apparent variability. In total, we have detected 35 variable objects of which four are not members of their corresponding clusters. The variables cover the entire Hertzsprung-Russell diagram, hence they are interesting targets for follow-up observations.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Universidad Nacional de Tucumán

Journal

Astronomy & Astrophysics

Band

418

Seiten

99-102

Anzahl der Seiten

4

ISSN

0004-6361

Publikationsdatum

2004

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/9baaed10-e5e5-40de-b178-ab85dc7326cb