scholarly journals Neon Abundances in B Stars of the Orion Association: Solving the Solar Model Problem?

2006 ◽  
Vol 647 (2) ◽  
pp. L143-L146 ◽  
Author(s):  
Katia Cunha ◽  
Ivan Hubeny ◽  
Thierry Lanz
Keyword(s):  
Model Problem ◽  
Solar Model ◽  
B Stars ◽  
Orion Association

Boron Abundances of B Stars of the Orion Association

1997 ◽  
Vol 478 (1) ◽  
pp. 211-224 ◽  
Author(s):  
Katia Cunha ◽  
David L. Lambert ◽  
Michael Lemke ◽  
Douglas R. Gies ◽  
Lewis C. Roberts
Keyword(s):  
B Stars ◽  
Orion Association

scholarly journals SULFUR ABUNDANCES IN THE ORION ASSOCIATION B STARS

2009 ◽  
Vol 138 (6) ◽  
pp. 1577-1583 ◽  
Author(s):  
Simone Daflon ◽  
Katia Cunha ◽  
Ramiro de la Reza ◽  
Jon Holtzman ◽  
Cristina Chiappini
Keyword(s):  
B Stars ◽  
Orion Association

scholarly journals Sulfur Abundances in Orion B Stars

2009 ◽  
Vol 5 (S265) ◽  
pp. 358-359 ◽  
Author(s):  
Simone Daflon ◽  
Katia Cunha ◽  
Ramiro de la Reza ◽  
Jon Holtzman ◽  
Cristina Chiappini
Keyword(s):  
Line Formation ◽  
Orion Nebula ◽  
Abundance Distribution ◽  
Formation Theory ◽  
Abundance Gradient ◽  
B Stars ◽  
Orion Association ◽  
Spectrum Synthesis

AbstractSulfur abundances are derived for a sample of ten B MS star members of the Orion association. The analysis is based on LTE model atmospheres and non-LTE line formation theory by means of spectrum synthesis analysis of Sii and Siii lines. The abundance distribution obtained for the Orion targets is homogeneous within the errors in the analysis: A(S)=7.15±0.05. This abundance result is in agreement with the solar value and with results for the Orion nebula. The sulfur abundances for Orion combined with previous results for other OB-type stars produce a relatively shallow sulfur abundance gradient with a slope of −0.037±0.012 dex Kpc−1.

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