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

Katia Cunha, Ivan - Hubeny, Thierry Lanz

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

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)
JournalAstrophysical Journal
Volume647
Issue number2 II
DOIs
StatePublished - Aug 20 2006

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B stars
neon
atmospheres
stars
atmosphere
light elements
three dimensional models
coronas
corona
sun
metal

Keywords

  • Stars: abundances
  • Stars: early-type

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Neon abundances in B stars of the orion association : Solving the solar model problem? / Cunha, Katia; Hubeny, Ivan -; Lanz, Thierry.

In: Astrophysical Journal, Vol. 647, No. 2 II, 20.08.2006.

Research output: Contribution to journalArticle

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AU - Lanz, Thierry

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