Structure of the Solar Core: Effect of Asymmetry of Peak Profiles | Zendy

Sarbani Basu | Zendy; S. TurckChièze | Zendy; G. Berthomieu | Zendy; A. S. Brun | Zendy; T. Corbard | Zendy; G. Gonczi | Zendy; J. ChristensenDalsgaard | Zendy; J. Provost | Zendy; Sylvain Thiery | Zendy; A. H. Gabriel | Zendy; P. Boumier | Zendy

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Structure of the Solar Core: Effect of Asymmetry of Peak Profiles

Author(s) -

Sarbani Basu,

S. TurckChièze,

G. Berthomieu,

A. S. Brun,

T. Corbard,

G. Gonczi,

J. ChristensenDalsgaard,

J. Provost,

Sylvain Thiery,

A. H. Gabriel,

P. Boumier

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/308875

Subject(s) - physics , asymmetry , solar core , computational physics , inversion (geology) , helioseismology , oscillation (cell signaling) , mode (computer interface) , spectral line , core (optical fiber) , spacecraft , astrophysics , solar physics , optics , astronomy , magnetic field , quantum mechanics , paleontology , genetics , structural basin , solar neutrino , computer science , neutrino , biology , operating system , neutrino oscillation

Recent studies have established that peaks in solar oscillation power spectraare not Lorentzian in shape, but have a distinct asymmetry. Fitting a symmetricLorentzian profile to the peaks therefore produces a shift in frequency of themodes. Accurate determination of low-frequency modes is essential to infer thestructure of the solar core by inversion of the mode frequencies. In this paperwe investigate how the changes in frequencies of low-degree modes obtained byfitting symmetric and asymmetric peak profiles change the inferred propertiesof the solar core. We use data obtained by the Global Oscillations at LowFrequencies (GOLF) project on board the SoHO spacecraft. Two different solarmodels and inversion procedures are used to invert the data to determine thesound speed in the solar core. We find that for a given set of modes nosignificant difference in the inferred sound-speed results from takingasymmetry into account when fitting the low-degree modes.Comment: To appear in Ap

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