Can the solar angular momentum problem be solved without internal gravity waves?

TL;DR

This paper investigates the solar radiative zone spin-down problem by replacing internal gravity waves with a shear vorticity model, showing it can produce similar effects on a comparable timescale.

Contribution

The study introduces a shear vorticity model as an alternative to internal gravity waves for explaining solar radiative zone spin-down.

Findings

Shear vorticity model mimics IGW effects

Spin-down timescale around 10^7 years

Potential alternative to IGW in solar models

Abstract

The solar radiative zone spin down problem is treated without internal gravity waves, IGW. The shear-only model of the Reynolds stresses adopted thus far in all calculations, is substituted by a shear vorticity model. The latter component is shown to play a role analogous to the IGW and with a similar time scale of about 107years.