SIMBAD references

2006ApJ...647L.143C - Astrophys. J., 647, L143-L146 (2006/August-3)

Neon abundances in B stars of the Orion association: solving the solar model problem?


Abstract (from CDS):

We report on non-LTE Ne abundances for a sample of B-type stellar members of the Orion association. The abundances were derived by means of non-LTE fully metal-blanketed model atmospheres and extensive model atoms with updated atomic data. We find that these young stars have a very homogeneous abundance of A(Ne)=8.11±0.04. This abundance is higher by ∼0.3 dex than the currently adopted solar value, A(Ne)=7.84, which is derived from lines produced in the corona and active regions. The general agreement between the abundances of C, N, and O derived for B stars with the solar abundances of these elements derived from three-dimensional hydrodynamical models atmospheres strongly suggests that the abundance patterns of the light elements in the Sun and B stars are broadly similar. If this hypothesis is true, then the Ne abundance derived here will help to reconcile solar models with helioseismological observations.

Abstract Copyright:

Journal keyword(s): Stars: Abundances - Stars: Early-Type

Simbad objects: 14

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