Oscillations in roAp and delta-Scuti Stars: Theory and Observations

F. J. G. Pinheiro

Abstract. δ Scuti and roAp stars lie in the region of the Instability Strip that is crossed by the Main Sequence. Each kind of stars shows oscillation frequencies that the other kind of stars does not have. These oscillations depend on the structure of the stars, and can be described by the appropriate models.
Working the other way around, it is also possible from observations to obtain the characteristics of a star, using the proper models.
We will discuss the methods to obtain and reduce observations of these stars, and to analyse the obtained data with the purpose of finding those oscillation frequencies. Particularly, we will find out what are the conditions necessary to obtain some characteristics of the stars BN Cnc and BV Cnc from the Praesepe Cluster (M44) in the Cancer constellation

European Masters Degree in Astronomy
Faculdade de Ciências da Universidade do Porto
Supervisor(s): M. J. P. F. G. Monteiro, A. Pedrosa