AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 56. New Views of the Solar Interior
Solar, Display, Tuesday, June 1, 1999, 10:00am-7:00pm, Southeast Exhibit Hall

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[56.03] How much do helioseismological inferences depend upon the assumed reference model?

S. Basu (Inst. for Advanced Study), M.H. Pinsonneault (Ohio State U.), J.N. Bahcall (Inst. for Advanced Study)

We investigate systematic uncertainties in determining the profiles of the solar sound speed and the density by helioseismological techniques. We find that rms uncertainties averaged over the sun ~0.02%-0.04% are contributed to the sound speed profile by each of three sources: 1) the choice of assumed reference model, 2) the width of the inversion kernel, and 3) the measurement errors. The rms agreement between the standard solar model and the best helioseismological determinations is about 0.07%. The density profile is about an order of magnitude less well determined by the helioseismological measurements.

JNB and SB are supported in part by NSF grant #PHY95-13835.

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