Achernar Can be a Differential Rotator

Details Achernar Can be a Differential Rotator Achernar Can be a Differential Rotator

2005-09-07

arxiv.org/abs/astro-ph/0509173v1

Astronomy and Astrophysics

Astrophysics

Societe Francaise d'Astronomie et d'Astrophysique, France (2005)

Scientific paper

We take advantage of interferometric measurements of Achernar to inquire on its internal rotational law. The reinterpretation of interferome-tric data and the use of fundamental parameters corrected for gravitational darkening effects and models of 2D-models of internal stellar structures, lead us to the conclusion that the star could not be a rigid, near critical, rotator but a differential rotator with the core rotating $\sim3$ times faster than the surface.

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