Surface abundances of Am stars as a constraint on rotational mixing

Details Surface abundances of Am stars as a constraint on rotational mixing Surface abundances of Am stars as a constraint on rotational mixing

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..224..215r&link_type=abstract

The A-Star Puzzle, held in Poprad, Slovakia, July 8-13, 2004. Edited by J. Zverko, J. Ziznovsky, S.J. Adelman, and W.W. Weiss,

Other

1

Diffusion, Hydrodynamics, Stars: Abundances, Stars: Atmospheres, Stars: Chemically Peculiar, Stars: Individual (Hd 73045), Stars: Rotation.

Scientific paper

Abundance determinations obtained from spectroscopic observations of Am stars provide information concerning the transport processes present in these stars. In this paper we have used models of Am stars which include gravitational settling, thermal diffusion, and radiative accelerations for 24 elements. We used a specific model of rotation induced mixing which has reproduced anomalies in other types of stars. For this preliminary study, models of 1.7 M&sun; and 1.9 M&sun; have been computed. A comparison of the predicted abundances to the observed ones for the Praesepe star HD 73045 sets constraints on rotational mixing.

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