Volume 380, Number 2, December III 2001
|Page(s)||599 - 608|
|Section||Interstellar and circumstellar matter|
|Published online||15 December 2001|
A search for new variable stars in NGC 6231*
University of Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
2 Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium
3 European Southern Observatory, Alonso de Cordova 3107, Santiago, Chile
4 Nordic Optical Telescope, Apartado 474, 38700 Santa Cruz de La Palma, Canary Islands, Spain
Corresponding author: T. Arentoft, firstname.lastname@example.org
Accepted: 15 October 2001
NGC 6231 is a well-studied young open cluster hosting several variable stars. In the field six β Cephei stars, several eclipsing binaries and one δ Scuti star are known (as well as a foreground δ Scuti star). In an ongoing effort to map and study the variability in NGC 6231, we present new results based on CCD time-series data optimised for the bright β Cephei stars as well as data optimised for much fainter stars. We detect 17 new variable stars in the cluster, including three δ Scuti stars, three γ Doradus candidates, three Slowly Pulsating B star candidates and one, or possibly two, new β Cephei stars.
Key words: stars: variables: general / open clusters and associations: individual: NGC 6231 / techniques: photometric / methods: data analysis
© ESO, 2001
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