Insensitivity of solar p-mode frequencies to changes in the helium abundance

Abstract

view Abstract Citations (12) References (6) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Insensitivity of Solar p-Mode Frequencies to Changes in the Helium Abundance Guenther, D. B. ; Sarajedini, Ataollah Abstract P-mode oscillation spectra (l = 0-4; n = 12-30) were calculated for three solar models with helium mass fractions Y = 0.230, 0.235, and 0.240. The solar models were tuned to have the Sun's radius and luminosity by adjusting both the age and the ratio of the mixing length to pressure scale height parameter. The models were identically constrained in all other respects. A 4 percent change in the mass fraction of helium produces less than a 0.1 percent change in the frequencies of the low degree p-modes. This result implies that it will be very difficult to determine the helium abundance of the sun directly from the p-mode oscillation spectrum since the frequencies of the modes are relatively insensitive to changes in the helium abundance. Publication: The Astrophysical Journal Pub Date: April 1988 DOI: 10.1086/166256 Bibcode: 1988ApJ...327..993G Keywords: Abundance; Acoustic Velocity; Helium; Molecular Weight; Solar Interior; Solar Oscillations; Equations Of State; Heavy Elements; Perturbation Theory; Stellar Evolution; Vibrational Spectra; Solar Physics; SUN: ABUNDANCES; SUN: INTERIOR; SUN: OSCILLATIONS full text sources ADS |