## Abstract

A turbulent transport of radiation in the solar convective zone is investigated. The mean-field equation for the irradiation intensity is derived. It is shown that due to the turbulent effects, the effective penetration length of radiation can be increased several times in comparison with the mean penetration length of radiation (defined as an inverse mean absorption coefficient). Using the model of the solar convective zone based on mixing length theory, where the mean penetration length of radiation is usually much smaller than the turbulent correlation length, it is demonstrated that the ratio of the effective penetration length to the mean penetration length of radiation increases 2.5 times in the vicinity of the solar surface. The main reasons for this are the compressibility effects that become important in the vicinity of the solar surface where temperature and density fluctuations increase towards the solar surface, enhancing fluctuations of the radiation absorption coefficient and increasing the effective penetration length of radiation.

Original language | English |
---|---|

Pages (from-to) | 1296-1304 |

Number of pages | 9 |

Journal | Monthly Notices of the Royal Astronomical Society |

Volume | 508 |

Issue number | 1 |

DOIs | |

State | Published - 1 Nov 2021 |

## Keywords

- Radiative transfer
- Sun: Interior
- Turbulence

## ASJC Scopus subject areas

- Astronomy and Astrophysics
- Space and Planetary Science