On the multiperiodicity of the Scuti star BDS 1269A (VW Arietis). The fifth campaign of STEPHI network in 1993

¹ Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing, China
² Observatoire de Paris-Meudon, DASGAL, URA 335, F-92195 Meudon, France
³ Instituto de Astrofísica de Canarias, F-38200 La Laguna, Tenerife, Spain
⁴ Observatoire de Paris-Meudon, DAEC, F-92195 Meudon, France
⁵ Observatoire de Paris-Meudon, DESPA, F-92195 Meudon, France

Send offprint request to: Liu Yan-ying

Received: 25 August 1995
Accepted: 11 April 1996

Abstract

This paper reports on the fifth STEPHI multi-site photometric campaign in 1993 devoted to the δ Scuti star BDS 1269A (VW Ari). The observation yielded a data set of 150.7 hours. Our analysis has resulted in 7 identified frequencies. These frequencies exhibit three couple-frequency character, and also fit the previous investigations quite well. An attempt to identify the pulsation modes is made, but no equidistant evidence can be detected, and a second-order effect for rotational splitting has to be considered to explain the complicated nature of BDS 1269A.