CHANNELING 5 MINUTE PHOTOSPHERIC OSCILLATIONS INTO THE SOLAR OUTER ATMOSPHERE THROUGH SMALL-SCALE VERTICAL MAGNETIC FLUX TUBES

摘要

We report two-dimensional MHD simulations which demonstrate that photospheric 5 minute oscillations can leak into the chromosphere inside small-scale vertical magnetic flux tubes. The results of our numerical experiments are compatible with those inferred from simultaneous spectropolarimetric observations of the photosphere and chromosphere obtained with the Tenerife Infrared Polarimeter (TIP) at 10830 A. We conclude that the efficiency of energy exchange by radiation in the solar photosphere can lead to a significant reduction of the cutoff frequency and may allow for the propagation of the 5 minute waves vertically into the chromosphere.