Forbidden Ca ii in the Sun unmasked by way of Venus |
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| Authors: | Ronald A Schorn Andrew T Young Edwin S Barker |
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| Institution: | 1. Physics Dept., Texas A & M University, 77843, College Station, Tex., U.S.A.
2. The University of Texas, McDonald Observatory, 79734, Fort Davis, Tex., U.S.A.
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| Abstract: | Eleven high-dispersion spectra of Venus, taken with blue Doppler shifts have enabled us to unmask the 7323.88 Å forbidden line of Ca ii from terrestrial absorption. We obtain an equivalent width of 7.4±0.4 mÅ for this line in integrated sunlight. Our value of W λ is smaller than previous values and much more accurate. The HSRA solar model gives a solar calcium abundance of A Ca = 6.21. |
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