The Boron Isotope Ratio in HD 76932

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Data in the lambda 2090 B region of HD 76932 were obtained using the HST GHRS echelle at a resolution of 90,000. This wavelength region has been previously identified as a likely candidate for observing the (11) B/(10) B isotopic splitting (Johansson et al. 1993). Data presented here provides some constraints on the isotopic ratio, but it is not certain whether or not the line in question is blended with unknown stellar absorption feature(s), making an unambiguous detection of the isotopic ratio impossible. The constraints that can be placed on the isotopic ratio based on these data are discussed.

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