Does solar structure vary with solar magnetic activity?

Details Does solar structure vary with solar magnetic activity? Does solar structure vary with solar magnetic activity?

2004-11-15

arxiv.org/abs/astro-ph/0411427v1

Astrophys.J. 617 (2004) L155

Astronomy and Astrophysics

Astrophysics

To appear in ApJ Letters

Scientific paper

10.1086/427435

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.

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