Theoretical estimates of the convective turnover time for low-mass, rotating pre-main sequence stars

Autor:	L. T. S. Mendes, L. P. R. Vaz, N. R. Landin
Rok vydání:	2006
Předmět:	Physics Convection T Tauri star Turnover time Space and Planetary Science Astronomy Astronomy and Astrophysics Astrophysics Low Mass Main sequence
Zdroj:	Proceedings of the International Astronomical Union. 2:446-448
ISSN:	1743-9221 1743-9213
Popis:	The Rossby number Ro is an important quantity related to the well-known magnetic activity-rotation correlation for main sequence, solar-type stars. For such stars, Ro can be obtained by a semi-empirical relationship between the convective turnover time τc and the B-V colour index, but an equivalent activity-rotation correlation seems not to exist for pre-main sequence stars. In this work we report theoretical estimates of τc for low-mass, rotating pre-main sequence stars under either the Full Spectrum of Turbulence (FST) or the classical Mixing Length Theory (MLT) convection models. The results for the MLT models show that the lower the convection efficiency the higher τc, while the FST models give τc lower than those for the MLT. The presence of a parametric magnetic field lowers the convection efficiency, resulting in smaller τc values.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7756b990b6e5ed489cf09add9b803196 https://doi.org/10.1017/s1743921307000889 Zobrazit plný text záznamu Plný text ve formátu PDF