منابع مشابه
Oxygen Gas Phase Abundance Revisited
We present new measurements of the interstellar gas-phase oxygen abundance along the sight lines towards 19 early-type galactic stars at an average distance of 2.6 kpc. We derive O I column densities from HST/STIS observations of the weak 1355 Å intersystem transition. We derive total hydrogen column densities [N(H I)+2N(H2)] using HST/STIS observations of Lyman-α and FUSE observations of molec...
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Data on energy and mineral reserves suggest that natural resource abundance has not been a significant structural determinant of economic growth between 1970 and 1989. The story behind the effect of natural resources on economic growth is a complex one that typical growth regressions do not capture well. Preliminary evidence suggests that natural resources may affect economic growth through bot...
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We present oxygen abundances of dwarfs in the young open cluster IC 4665 deduced from the O I λ7774 triplet lines and of dwarfs in the open cluster Pleiades derived from the [O I] λ6300 forbidden line. Stellar parameters and oxygen abundances were derived using the spectroscopic synthesis tool SME (Spectroscopy Made Easy). We find a dramatic increase in the upper boundary of the O I triplet abu...
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Using the Goddard High Resolution Spectrograph (GHRS) onboard the Hubble Space Telescope, we have obtained high S/N echelle observations of the weak interstellar O I λ1356 absorption toward the stars γ Cas, Per, δ Ori, Ori, 15 Mon, τ CMa, and γ Ara. In combination with previous GHRS measurements in six other sightlines (ζ Per, ξ Per, λ Ori, ι Ori, κ Ori, and ζ Oph), these new observations yield...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/375530