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

¹ Instituto de Astronomía, UNAM. Ap. Postal 70-264, México
² Facultad de Física, UV, Ap. Postal 270, Xalapa, Ver. México
³ Instituto de Astrofísica de Andalucía, Apdo. 3004, 18080, Granada, Spain
⁴ Konkoly Observatoty, Box 67, H-1525 Budapest XII, Hungary
⁵ Ege University Observatory, Bornova - Izmir, Turkey

Send offprint request to: J.H. Peña

Received: 24 February 1997
Accepted: 9 September 1997

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.