Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-03-28
SolarPhys.242:1-2,2007
Astronomy and Astrophysics
Astrophysics
12 pages, 6 figures, the paper is accepted in Solar Physics Journal
Scientific paper
10.1007/s11207-007-0369-5
High frequency acoustic waves have been suggested as a source of mechanical heating in the chromosphere. In this work the radial component of waves in the frequency interval 22mHz to 1mHz are investigated. Observations were performed using 2D spectroscopy in the spectral lines of Fe I 543.45nm and Fe I 543.29nm at the Vacuum Tower Telescope, Tenerife, Spain. Speckle reconstruction has been applied to the observations. We have used Fourier and wavelet techniques to identify oscillatory power. The energy flux is estimated assuming that all observed oscillations are acoustics running waves. We find that the estimated energy flux is not sufficient to cover the chromospheric radiative losses.
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