Origin of the Near-Surface Rotational Shear Layer of the Sun

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Дәйексөз келтіру

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Рұқсат жабық Тек жазылушылар үшін

Аннотация

Helioseismology has revealed an increase in the rotation rate with depth in a thin (∼30 Mm)
near-surface layer. The normalized rotational shear in this layer does not depend on latitude. This rotational
state is shown to be a consequence of the short characteristic time of near-surface convection compared
to the rotation period and radial anisotropy of convective turbulence. Analytical calculations within meanfield
hydrodynamics reproduce the observed normalized rotational shear and are consistent with numerical
experiments on radiative hydrodynamics of solar convection. The near-surface shear layer is the source of
global meridional flow important for the solar dynamo.

Негізгі сөздер

Авторлар туралы

L. Kitchatinov

Institute of Solar–Terrestrial Physics, Russian Academy of Sciences,
Siberian Branch; Pulkovo Astronomical Observatory, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: kit@iszf.irk.ru
Irkutsk, 664033 Russia; St. Petersburg, 196140 Russia

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