Does Solar Structure Vary with Solar Magnetic Activity?
Authors:
- 19 November 2004
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 617 (2) , L155-L158
Abstract
We present evidence that solar structure changes with changes in solar activity. We find that the adiabatic index, Gamma_1, changes near the second helium ionization, i.e., at a depth of about 0.98 R_sun. We believe that this change is a result of the change in the effective equation of state caused by magnetic fields. Inversions should be able to detect the changes in Gamma_1 if mode sets with reliable and precise high-degree modes are available.Keywords
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This publication has 20 references indexed in Scilit:
- Ring‐Diagram Analysis of the Structure of Solar Active RegionsThe Astrophysical Journal, 2004
- Changes in Solar Dynamics from 1995 to 2002The Astrophysical Journal, 2003
- An Upper Limit on the Temporal Variations of the Solar Interior StratificationThe Astrophysical Journal, 2002
- Inferences on the solar envelope with high-degree modesAstronomy & Astrophysics, 2002
- Seismology of the base of the solar convection zoneMonthly Notices of the Royal Astronomical Society, 1997
- The Solar Acoustic Spectrum and Eigenmode ParametersScience, 1996
- Effects of diffusion on the extent of overshoot below the solar convection zoneMonthly Notices of the Royal Astronomical Society, 1994
- Helioseismic measurement of the extent of overshoot below the solar convection zoneMonthly Notices of the Royal Astronomical Society, 1994
- Variation of low-order acoustic solar oscillations over the solar cycleNature, 1990
- The equation of state for stellar envelopes. III - Thermodynamic quantitiesThe Astrophysical Journal, 1988