Upper limits for interstellar boron and beryllium abundances toward zeta Ophiuchi

Details Upper limits for interstellar boron and beryllium abundances toward zeta Ophiuchi Upper limits for interstellar boron and beryllium abundances toward zeta Ophiuchi

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255..524y&link_type=abstract

Astrophysical Journal, Part 1, vol. 255, Apr. 15, 1982, p. 524-526.

Astronomy and Astrophysics

Astrophysics

10

Abundance, Beryllium Isotopes, Boron Isotopes, Interstellar Matter, Stars, Ultraviolet Spectra

Scientific paper

Observations of interstellar boron and beryllium in the ζ Oph spectrum were made using Copernicus. While neither element was detected, the boron limit can be used to derive [B/H] < 3 × 10-11 in the main interstellar cloud seen toward ζ Oph. Since [B/H] =15 0.7 × 10-10 in the interstellar gas between the Sun and κ Ori, and since in stars of Type A and B, [B/H] ∼2 × 10-10, we conclude that boron is depleted in the main ζ Oph cloud and that the abundance of boron in the interstellar medium is variable, probably by at least a factor of 5. It is argued that future searches for B ii and Be II in interstellar gas should be at the 50 and 10 μÅ level, respectively.

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