Tachocline

The tachocline region or short tachocline is a term used in solar physics.

While the outer areas of the solar rotate at 25.4 days and 36 days at the equator to the poles about the sun axis, the sun inside rotates as a rigid body with a rotation period of slightly less than 27 days. The transition area, which is characterized by a high degree of differential rotation is referred to as tachometer Cline.

The tachocline is near the equator to rt = 0.693 ± 0.003 R ☉ and at 60 ° to rt = 0.717 ± 0.003 R ☉ centered and thus prolate. It has a thickness of about rt = 0.04 solar radii ( details vary by different definitions) and is therefore in the vicinity of the interface between the radiation zone and convection zone, the = 0.713 ± 0.003 R ☉ is located at rt and in so far no variation could be detected with the solar latitude.