A&A Supplement series, Vol. 129, April I 1998, 9-22

Received February 24; accepted September 9, 1997

Photoelectric photometry and period analysis of selected Delta Scuti stars in Praesepe

J.H. Peña - R. Peniche - M.A. Hobart - A. Rolland - P. López de Coca - M. Paparo - L. Parrao - C. de la Cruz - J.I. Olivares - V. Costa - C. Ibanoglu - A.Y. Ertan - O. Tumer - S. Evren - Z. Tunca

Send offprint request: J.H. Peña

  Instituto de Astronomıa, UNAM. Ap. Postal 70-264, México
  Facultad de Fısica, UV, Ap. Postal 270, Xalapa, Ver. México
  Instituto de Astrofısica de Andalucıa, Apdo. 3004, 18080, Granada, Spain
  Konkoly Observatoty, Box 67, H-1525 Budapest XII, Hungary
  Ege University Observatory, Bornova - Izmir, Turkey

Abstract:

Photoelectric photometry of seven Delta Scuti stars in Praesepe was secured. Three of them were observed simultaneously at observatories located at different longitudes. Period analysis has been carried out for each star with different computing packages and the results compared to those in the literature. Their physical characteristics have been determined from the Strömgren photometry and theoretical and empirical calibrations.

keywords: stars: Delta Scuti: open clusters: Praesepe -- stars: oscillations

• 1. Introduction
• 2. Observations
• 3. Discussion
• 4. Analysis and interpretation
• 5. Conclusions
• References