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Astron. Astrophys. 317, 919-924 (1997)

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Seismic sounding of the solar core: purging the corruption from the Sun's magnetic activity

W.A. Dziembowski 1, 2 and Philip R. Goode 2, 1

1 N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, PL-00-716 Warszawa, Poland
2 Physics Department, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, NJ 07102, USA

Received 25 March 1996 / Accepted 11 June 1996


Probing the structure and rotation of the solar core is one of the greatest challenges to helioseismology. We show that the seismic information in the observed low degree solar oscillations which probe the core is severely contaminated. This contamination arises from the Sun's near surface magnetic activity. The effect on the oscillation frequencies varies with the solar cycle-vanishing at solar minimum and growing with increasing surface activity. We demonstrate that this contamination can be quantified and removed after determining the fine structure of the entire oscillation spectrum.

Key words: Sun: oscillations – Sun: interior – Sun: activity

Send offprint requests to: W.A. Dziembowski


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© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998