On the contribution of horizontal granular motions to observed limb-effect curves |
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| Authors: | Horst Balthasar |
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| Institution: | (1) Universitäts-Sternwarte Göttingen, Geismarlandstr. 11, D-3400 Göttingen, F.R.G. |
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| Abstract: | From the comparison of 59 iron lines at the center of the solar disk with laboratory wavelenghts, the mean vertical velocity of solar granulation and its depth dependence is determined. These values are used to calculate limb-effect curves. The differences to observed curves are interpreted as mean horizontal motions. These motions yield again a depth dependence showing Doppler shifts toward the observer in deep layers and away from the observer in high layers for regions away from the disk center. Values from - 400 m s–1 through + 500 m s–1 are obtained. |
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