A closer look at the transition between fully convective and partly radiative low mass stars
Abstract
Recently, Jao et al. (2018) discovered a gap in the mid-M dwarfs main sequence revealed by the analysis of Gaia data Release 2. They suggested the feature is linked to the onset of full convection in M dwarfs. Following the announcement of this discovery, MacDonald & Gizis (2018) proposed an explanation based on standard stellar evolution models. In this paper we re-examine the explanation suggested by MacDonald & Gizis (2018). We confirm that nuclear burning and mixing process of He provide the best explanation for the observed feature. We also find that a change in the energy transport from convection to radiation does not induce structural changes that could be visible. Regarding the very details of the process, however, we disagree with MacDonald & Gizis (2018) and propose a different explanation.
Cite
@article{arxiv.1809.07274,
title = {A closer look at the transition between fully convective and partly radiative low mass stars},
author = {Isabelle Baraffe and Gilles Chabrier},
journal= {arXiv preprint arXiv:1809.07274},
year = {2018}
}
Comments
5 pages, 6 figures, accepted for publication in Astronomy & Astrophysics