Tidal dynamo in solar-like close binary stars
Solar and Stellar Astrophysics
2022-05-25 v1
Abstract
Thermal convection is commonly believed to be the energy source of stellar or planetary dynamo. In this short paper we provide another possibility, namely large-scale tidal flow. In close binary stars, say, solar-like stars with orbital period at 2 or 3 days, large-scale tidal flow is comparable to or even stronger than convective flow, and it can induce magnetic dynamo action. Based on dynamo equation and tidal theory we estimate the magnetic energy induced by large-scale tidal flow, which is proportional to the cube of orbital frequency. Our estimation can be tested by the future spectropolarimetric observations and numerical simulations for close binary stars.
Keywords
Cite
@article{arxiv.2205.06959,
title = {Tidal dynamo in solar-like close binary stars},
author = {Xing Wei},
journal= {arXiv preprint arXiv:2205.06959},
year = {2022}
}