Transition region above sunspots inferred from microwave observations |
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| Authors: | A N Korzhavin L V Opeikina N G Peterova |
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| Institution: | 1.Special Astrophysical Observatory, St. Petersburg Branch,Russian Academy of Sciences,St. Petersburg,Russia;2.Special Astrophysical Observatory,Russian Academy of Sciences,Nizhnij Arkhyz,Russia |
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| Abstract: | We report the results of spectral-polarization observations of the active region NOAA 10848 made with the RATAN-600 radio
telescope. High spectral resolution (1%) of observations allowed obtaining detailed temperature height profiles for the sources
located above the sunspots in the transition region from the chromosphere to the corona. The resulting vertical profiles indicate
that the transition region above the sunspots may extend over a considerable height interval and be characterized by a gradual
increase of temperature—a pattern that is inconsistent with model atmospheres having a sharp temperature increase in the transition
region. |
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