Small-scale topology of solar atmosphere dynamics. I. Wave sources and wave diffraction

Details Small-scale topology of solar atmosphere dynamics. I. Wave sources and wave diffraction Small-scale topology of solar atmosphere dynamics. I. Wave sources and wave diffraction

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...329..276h&link_type=abstract

Astronomy and Astrophysics, v.329, p.276-290 (1998)

Astronomy and Astrophysics

Astrophysics

20

Sun: Atmosphere, Sun: Photosphere, Sun: Chromosphere, Sun: Granulation, Sun: Oscillations

Scientific paper

We study the small-scale topology of dynamical phenomena in the quiet-sun internetwork atmosphere, using short-duration Fourier analysis of high-resolution filtergram sequences to obtain statistical estimates for the co-location probability of different fine-structure elements and wave modes. In this initial paper we concentrate on the topology of short-duration Fourier amplitude maps for the photosphere and the simultaneously observed overlying chromosphere. We find that these maps portray a complex mix of global modes and locally excited waves which necessitates a statistical approach. Various aspects including mesoscale patterning indicate the presence of subsurface wave sources and of subsurface wave diffraction by convective inhomogeneities.

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