Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates

Details Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0707b&link_type=abstract

American Astronomical Society Meeting 204, #07.07; Bulletin of the American Astronomical Society, Vol. 36, p.786

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of nonlinear 3--D simulations of magnetic dynamo action by core convection within A-type stars of 2 solar masses, at a range of rotation rates. We consider the inner 30% by radius of such stars, with the spherical domain thereby encompassing the convective core and a portion of the surrounding radiative envelope. We solve the compressible Navier-Stokes equations in the anelastic approximation to examine highly nonlinear flows that span multiple scale heights, exhibit intricate time dependence, and admit magnetic dynamo action. Small initial seed magnetic fields are found to be amplified greatly by the convective and zonal flows. The central columns of strikingly slow rotation found in some of our progenitor hydrodynamic simulations continue to be realized in some simulations to a lesser degree, with such differential rotation arising from the redistribution of angular momentum by the nonlinear convection and magnetic fields. We assess the properties of the magnetic fields thus generated and the magnitude of the differential rotation sustained as the rotation rate in our simulations is varied.

Affiliated with

Also associated with

No associations

Rating

Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of Core Convection and Dynamo Activity in A-type Stars at a Range of Rotation Rates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1170366