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This is a Experimental Study study.

Rotational radial shear in the low solar photosphere. Direct detection from high-resolution spectro-imaging

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High-resolution spectro-imaging reveals differential rotation in the solar photosphere, suggesting crucial insights into dynamo theory.

Measurements indicate a parabolic decrease in rotational velocity that is about 16% slower at 80 km above the continuum.
Radial differential rotation was observed using spectroscopic scans of granular structures in Fe I and Ca I lines.
The study highlights a lack of significant difference in rotation rates between equatorial and ± 25° latitudes.
Observations provide new constraints on the dynamics of the low photosphere, essential for modeling the Sun’s convection zone.

Corbard et al. (2025) studied this question.

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View Full Paper

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Authors

High-resolution spectro-imaging reveals differential rotation in the solar photosphere, suggesting crucial insights into dynamo theory.

Measurements indicate a parabolic decrease in rotational velocity that is about 16% slower at 80 km above the continuum.
Radial differential rotation was observed using spectroscopic scans of granular structures in Fe I and Ca I lines.
The study highlights a lack of significant difference in rotation rates between equatorial and ± 25° latitudes.
Observations provide new constraints on the dynamics of the low photosphere, essential for modeling the Sun’s convection zone.

Corbard et al. (2025) studied this question.

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