期刊
ASTROPHYSICAL JOURNAL
卷 647, 期 2, 页码 L143-L146出版社
UNIV CHICAGO PRESS
DOI: 10.1086/507301
关键词
stars : abundances; stars : early-type
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. This abundance is higher by similar to 0.3 dex than the currently adopted solar value, A(Ne) p 8.11 +/- 0.04 A(Ne) p, which is derived from lines produced in the corona and active regions. The general agreement between the 7.84 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.
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