Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars

Details Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...283..155c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 283, no. 1, p. 155-162

Astronomy and Astrophysics

Astrophysics

31

Abundance, Beryllium, Galactic Clusters, Lithium, Meridional Flow, Stellar Models, Stellar Rotation, Sun, Turbulent Flow, Turbulent Mixing, Angular Momentum, Angular Velocity, Centrifugal Force, Computerized Simulation, Opacity, Stellar Winds

Scientific paper

Lithium and beryllium depletion by rotation-induced mixing in Population I G and F stars is investigated under the scope of recent strides of the theory of rotational mixing and of the observational constraints on rotational velocities. Following Zahn (1992) who proposed a consistent picture of the interaction between meridional circulation and turbulence induced by rotation in stars, we calculate the effect of the resulting mixing on the lithium and beryllium depletion in low mass stars. We restrict our study to the case where the stars are submitted to a moderate wind which obeys Skumanich's (1972) spindown relation. Stellar models are computed with the new OPAL opacities, and adjustable stellar parameters are calibrated using the Sun. The results of our numerical simulations are precisely compared with lithium and beryllium abundances observed in seven galactic lusters. The red side of the lithium dip is well explained by rotation-induced mixing and a beryllium dip consistent with observations is predicted. The rotation velocity dispersion in the Hyades accounts for the lithium abundance dispersion.

Affiliated with

Also associated with

No associations

Rating

Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars 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 Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium and beryllium depletion by rotation-induced mixing in the Sun and in galactic cluster stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1869920