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3D hydrodynamical model stellar atmospheres of metal-poor red giants

Published online by Cambridge University Press:  23 December 2005

Remo Collet ,
Martin Asplund  and
Regner Trampedach
Remo Collet
Affiliation:
Department of Astronomy & Space Physics, BOX 515, SE-751 20 Uppsala, Sweden email: remo@astro.uu.se
Martin Asplund
Affiliation:
Research School of Astronomy & Astrophysics, Cotter Road, Weston ACT 2611, Australia
Regner Trampedach
Affiliation:
Research School of Astronomy & Astrophysics, Cotter Road, Weston ACT 2611, Australia
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Abstract

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We investigate the main differences between static 1D and 3D time-dependent model stellar atmospheres of red giants at very low metallicities. We focus in particular on the impact of 3D LTE spectral line formation on the derivation of elemental abundances for the extremely metal-poor ([Fe/H] $\approx-$5.3) red giant HE 0107-5240.

Keywords

Stars: late-typestars: atmospheresmethods: numericalhydrodynamicsline: formationstars: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 247 - 248
Copyright
© 2005 International Astronomical Union