Solar abundance of gallium.
The spectral region around the lambda4172 A resonance line of gallium has been synthesized at disk positions mu = 1.0, 0.5, and 0.3. The center-limb variation can be reproduced by Elste's semiempirical model if a macroturbulent smearing of the emergent spectrum due to mass motions with mean velocity decreasing with altitude are introduced. The abundance of Ga derived from disk position mu = 1 is found to be log [N(Ga)/N(H)] + 12 = 2.80.
DEPARTMENT OF ASTRONOMY, UNIVERSITY OF CALIFORNIA (LOS ANGELES).
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Ross
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Aller