On the depth dependence of the solar rotation velocity determined from fraunhofer lines |
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| Authors: | Horst Balthasar |
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| Institution: | 1. Universit?ts-Sternwarte G?ttingen, Geismarlandstr, 11, D-3400, G?ttingen, F.R.G.
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| Abstract: | From 63 mostly unblended Fraunhofer lines measured along the solar east-west diameter the rotation velocity has been determined. The mean value is 1986 km s#X2212;1. The velocity decreases with the optical depth in the photosphere. Over a range of 700 km the difference of the velocities is 41 m s#X2212;1 for the Holweger-Müller atmosphere or 34 m s#X2212;1 for the Harvard Smithsonian reference atmosphere. |
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