TY - JOUR
T1 - Helioseismic constraints on the chemical composition and the equation of state
AU - Lin, Chia Hsien
AU - Däppen, Werner
PY - 2003/2
Y1 - 2003/2
N2 - The intrinsic γ1 difference is defined as the discrepancy in the adiabatic exponent γ1, resulting from the discrepancies in the equation of state and the chemical composition. The other part of the γ1 difference, "induced" by the discrepancy in the internal structure (i.e., pressure, density or temperature) is excluded. Our examination of solar models revealed that the discrepancy in the heavy-element composition and the discrepancy in the equation of state result in different and independent features in the functional form of the intrinsic γ1 difference. Therefore, the two discrepancies can be distinguished by looking for the features that do not change when only either the equation of state or the chemical composition is being varied. The possibility of such a strategy was already discussed in an earlier study (Gong, Däppen and Nayfonov 2001), although only theoretically. Our inversion tests demonstrate the potential of its realization. In this paper, we present our initial inversion results between the Sun and various solar models and discuss the strengths and limits of our inversion code.
AB - The intrinsic γ1 difference is defined as the discrepancy in the adiabatic exponent γ1, resulting from the discrepancies in the equation of state and the chemical composition. The other part of the γ1 difference, "induced" by the discrepancy in the internal structure (i.e., pressure, density or temperature) is excluded. Our examination of solar models revealed that the discrepancy in the heavy-element composition and the discrepancy in the equation of state result in different and independent features in the functional form of the intrinsic γ1 difference. Therefore, the two discrepancies can be distinguished by looking for the features that do not change when only either the equation of state or the chemical composition is being varied. The possibility of such a strategy was already discussed in an earlier study (Gong, Däppen and Nayfonov 2001), although only theoretically. Our inversion tests demonstrate the potential of its realization. In this paper, we present our initial inversion results between the Sun and various solar models and discuss the strengths and limits of our inversion code.
KW - Helioseismology
KW - Inversion - method and uncertainty
KW - Sun - chemical composition and equation of state
UR - http://www.scopus.com/inward/record.url?scp=0037319141&partnerID=8YFLogxK
M3 - 會議論文
AN - SCOPUS:0037319141
SN - 0379-6566
SP - 337
EP - 340
JO - European Space Agency, (Special Publication) ESA SP
JF - European Space Agency, (Special Publication) ESA SP
IS - 517
T2 - PIC7
Y2 - 30 October 2003 through 3 November 2003
ER -