Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions

Details Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223..920v&link_type=abstract

Astrophysical Journal, Part 1, vol. 223, Aug. 1, 1978, p. 920-936.

Astronomy and Astrophysics

Astrophysics

88

Main Sequence Stars, Metallic Stars, Particle Diffusion, Stellar Motions, Turbulence Effects, Abundance, Approximation, Atmospheric Turbulence, Chemical Composition, Convection, Diffusion Coefficient, Helium, Mercury (Metal), Scandium, Shear Flow, Stellar Envelopes, Strontium, Turbulent Boundary Layer, Turbulent Diffusion

Scientific paper

A 'turbulent diffusion coefficient' is introduced into the diffusion velocity for the purpose of studying the competition between diffusion processes, which force the elements toward radial inhomogeneous equilibrium distributions, and turbulence, which restores homogeneous chemical composition. Numerical simulations of abundance evolution in envelopes of main-sequence stars are presented for a few elements, and turbulence constraints which are compatible with an efficient diffusion method are established. A method for obtaining the equilibrium concentration distribution in the presence of turbulence is developed and applied to cool Am stars. It is shown that the underabundant elements impose stringent constraints on the strength of the turbulence present below the convection zone.

Affiliated with

Also associated with

No associations

Rating

Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions 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 Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundance anomalies in main-sequence stars - Competition between diffusion processes and turbulent motions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-943309