Seismic detection of acoustic sharp features in the CoRoT target HD 49933
Seismic detection of acoustic sharp features in the CoRoT target HD 49933
The technique of determining the acoustic location of layers of sharp changes in the sound speed inside a star from the oscillatory signal in its frequencies is applied on a solar-type star, the CoRoT target, HD49933. We are able to determine the acoustic depth of the second helium ionisation zone …