Evidence for a sharp structure variation inside a red-giant star

  title={Evidence for a sharp structure variation inside a red-giant star},
  author={Andrea Miglio and Josefina Montalb'an and Fabien Carrier and Joris de Ridder and Beno{\^i}t Mosser and Patrick Eggenberger and Richard Scuflaire and Paolo Ventura and Francesca D’Antona and Arlette Noels and Annie Baglin},
  journal={Astronomy and Astrophysics},
Context. The availability of precisely determined frequencies of radial and non-radial oscillation modes in red giants is finally paving the way for detailed studies of the internal structure of these stars. Aims. We look for the seismic signature of regions of sharp structure variation in the internal structure of the CoRoT target HR 7349. Methods. We analyse the frequency dependence of the large frequency separation and second frequency differences, as well as the behaviour of the large… Expand

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