Seismic study of stellar convective cores

Details Seismic study of stellar convective cores Seismic study of stellar convective cores

2001-07-31

arxiv.org/abs/astro-ph/0107576v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A & A

Scientific paper

10.1051/0004-6361:20011072

It has been shown that a discontinuity in the derivatives of the sound speed at the edge of the convective regions inside a star gives rise to a characteristic oscillatory signal in the frequencies of stellar oscillations. This oscillatory signal has been suggested as a means to study the base of the outer convection zone in low mass stars and possibly the outer edge of the convective core in high mass stars. Using stellar models we show that because of a phenomenon similar to aliasing in Fourier transform, it may not be possible to use this signal to detect the convective core. Nevertheless, it may be possible to determine the size of convective cores using the frequency separation \nu_{n+1,l}-\nu_{n,l}.

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