Absolute shifts of Fe I and Fe II solar spectral lines in active areas (solar disk centre)

Details Absolute shifts of Fe I and Fe II solar spectral lines in active areas (solar disk centre) Absolute shifts of Fe I and Fe II solar spectral lines in active areas (solar disk centre)

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997kfnt...13e..75b&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol.13, no.5, p.75-86.

Computer Science

3

Sun: Atmospheric Motions, Sun: Photosphere, Sun: Spectral Lines

Scientific paper

Absolute shifts of Fe I and Fe II lines have been estimated based on the spectral observations obtained with Fourier spectrometer. The weak Fe I lines and all Fe II lines demonstrate a red shift tendency in comparison with their positions in quiet areas; the strong Fe I lines, the cores of which are formed higher than 425 km, have more bluer shifts increasing with decreasing lower excitation potential. To interpret these results, the two-dimensional MHD models are used, which reproduce relative red shifts of lines formed in deep photospheric layers. However, the blue shifts of lines formed in higher levels could not confirmed within the framework of these models.

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