A new way to infer variations of the seismic solar radius

Abstract

We show that the mean phase of waves propagating all the way from the far side of the Sun to the front side, as measured by seismic holography, varies with time. The change is highly anticorrelated with solar cycle activity and is consistent with other recent results on the variation of the seismic radius of the Sun. The phase change that we observe corresponds to a few kilometers difference in the seismic solar radius from solar maximum to solar minimum in agreement with inferrences from global helioseismology studies.

arXiv comment5 pages, accepted for publication in ApJ Letters (Dec 12 2008)

References in corpus (3)

• Accurate Determination of the Solar Photospheric Radius
• Solving the discrepancy between the seismic and photospheric solar radius
• Changes in the subsurface stratification of the Sun with the 11-year activity cycle

Cited by in corpus (5)

• Local Helioseismology: Three Dimensional Imaging of the Solar Interior
• Green's functions for far-side seismic images: a polar expansion approach
• Sun's Seismic Radius as Measured from the Fundamental Modes of Oscillations and its Implications for the TSI Variations
• High precision ground-based measurements of solar diameter in support of PICARD mission
• Long-Term Variation of Helioseismic Far-Side Images and What Causes It