SIMBAD references

2001ApJ...548..429P - Astrophys. J., 548, 429-438 (2001/February-2)

Boron abundances in early B stars: results from the B III resonance line in IUE data.


Abstract (from CDS):

We have used archival International Ultraviolet Explorer high-dispersion SWP spectra to study the B III resonance line at 2065.8 Å in 44 early B stars. We find a median boron abundance about half that of solar system meteoritic material, consistent with the values found from previous studies of boron in early B stars. About one-third of the stars studied appear to have boron abundances that are a factor of 4 or more lower than this median. Many of these are stars with enhanced nitrogen abundances, confirming the belief that deep envelope mixing can occur in main-sequence B stars. A few stars with low boron abundances have normal N/C ratios. It is unclear whether all of these can be explained as stars where mixing depleted the boron but did not go deep enough to bring CN-processed material to the surface or if some stars were actually formed with an unusually low boron abundance.

Abstract Copyright:

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

Simbad objects: 56

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