Delta Scuti stars are non-radial pulsators on the main sequence of the
HR diagram located near the Sun and most of them are fast rotators. The
appearance of the convective core and the effect of the fast rotation on
the pulsation make them challenging for modelling. The CoRoT (COnvection,
ROtation and planetary Transit) space mission aimed to serve data for investigation of
both the convection amd rotation.
Helioseismology (and solar type oscillation of other stars) proved to be successfull
in decribing the radial dependence of important physical parameters due to the regular
distribution of the excited modes in the asymptotic regime.
Although the traditional pulsational theory did not predict any regularity in Delta Scuti stars oscillating
in the non-asymptotic regime, we revealed regular arrengement of frequencies (echelle ridges) in 77 Delta Scuti
stars with a new method. The spacings of the echelle ridges are nearly equidistant, and are connected
to the large separation of the eigenmodes and to the rotational frequency.
The large separation, a basic parameter in asteroseismology, is derived for 77 Delta Scuti stars.
Our results made by Paparo, M., Benko, J.M, Hareter, M., and Guzik, J.A. have been accepted
in the main ApJ (Methodology) and in the ApJ Supplement (Sample - echelle diagrams and rotation).
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