On the dynamics of a radiative rapidly rotating star

Details On the dynamics of a radiative rapidly rotating star On the dynamics of a radiative rapidly rotating star

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009coast.158...99r&link_type=abstract

"Communications in Asteroseismology, Vol.158, p. 99 Proceedings of "38th Liege International Astrophysical Colloquium: Evolutio

Astronomy and Astrophysics

Astrophysics

6

Scientific paper

The envelope of massive rapidly rotating stars is pervaded by baroclinic fluid flows, namely a differential rotation with a meridional circulation and likely a small-scale turbulence. We present here some of the first results of the ESTER project (Evolution STEllaire en Rotation). More specifically, using for the first time the spheroidal geometry, we give the shape of the differential rotation and show that the baroclinic torque imposes a fast rotating core and a slow envelope, together with a slow pole and a fast equator. The angular velocity of the core is 50% larger than that of the envelope.

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