Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...270..516h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 270, no. 1-2, p. 516-521.
Astronomy and Astrophysics
Astronomy
16
Line Spectra, Photosphere, Solar Convection (Astronomy), Solar Granulation, Line Shape, Periodic Variations, Spatial Resolution
Scientific paper
We give a coherence analysis of various line parameters deduced from spatially highly resolved solar photospheric spectra obtained with the VTT at Izana, Tenerife. The high quality of the spectra and the selection of the wavelength range containing lines of different strengths allow us to investigate the transition from coherent to noncoherent flow patterns in the photosphere which occurs about a height of 150 km. The low correlation values found here are explained by an enhanced resolution of random motions and phase shifts between the intensity-velocity coherence which therefore reduces the coefficients. Two data sets containing a different number of data samples are compared and show nearly an identical behavior.
Hanslmeier Arnold
Mattig Wolfgang
Nesis Anastasios
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