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Centro de Astrofísica da Universidade do Porto

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

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Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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