On the position of sunspots in the core of Hα relative to the continuum |
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| Authors: | Oddbjörn Engvold |
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| Institution: | (1) Institute of Theoretical Astrophysics, University of Oslo, Norway |
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| Abstract: | The relative position of sunspots as observed in the core of H and in the continuum has been studied in 316 spectra of 84 different sunspots. We find that chromospheric features surrounding sunspots may produce apparent shifts of the spots in the core and in the wing of H. In addition a shift directed towards the limb is found. This shift is found to be a height effect. The difference in height between the levels of the H core and the continuum varies from 2300 km to 1000 km for different sunspots. |
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