Neon abundances in B stars of the orion association: Solving the solar model problem?

Katia Cunha, Ivan - Hubeny, Thierry Lanz

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99 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)L143-L146
JournalAstrophysical Journal
Issue number2 II
StatePublished - Aug 20 2006
Externally publishedYes


  • Stars: abundances
  • Stars: early-type

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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