## 1. IntroductionThis is the second of two papers analysing cospatial filtergram sequences of the solar photosphere and chromosphere taken with the Swedish Vacuum Solar Telescope on La Palma. Our goal is to search for local relations between waves and fine structure in the quiet photosphere and the overlying chromosphere. The first paper (Hoekzema et al. 1997; henceforth Paper I) described the science context, the data, the reduction procedures and initial results from wave-amplitude correlations between the photosphere (as imaged in the Fraunhofer G band, called G below) and the chromosphere (Ca II K filtergrams, called K below). Its main conclusion was that at small spatial scales global and local modulation combine into a complex mix which betrays signatures of local wave excitation by intergranular lanes and displays persistent mesoscale patterning in the chromosphere. The latter may arise from subsurface wave sources and subsurface diffraction. In this paper we extend the analysis by studying such wave and fine structure relations in time-lapse fashion, searching for spatial alignments of different dynamical patterns admitting time delays between them. The data and the approach are the same as in Paper I. We again
combine the Fourier amplitude maps constructed in Paper I with
the statistical correspondence factor In summary, the small-scale topology patterns addressed here
consist of photospheric and chromospheric spatial wave amplitude
distributions at 5-min periodicity (photospheric In the next section we summarize the data, the construction of the Fourier maps and the definition of the correspondence factor given in Paper I, and we define the additional brightness classifications used here. The results are given in Sect. 3 and discussed in Sect. 4. The various time-delay correspondence charts provide intriguing hints of piston properties and piston persistence which again point to the importance of mesoscale patterning in the dynamical coupling between the photosphere and the internetwork chromosphere. © European Southern Observatory (ESO) 1998 Online publication: December 8, 1997 |