Abstract
Three independent sets of data: (i) series of filtergrams obtained in line CaII K (393.416 nm) with the ground-based telescope Precision Solar Photometric Telescope (PSPT) of Mauna Loa Solar Observatory; (ii) series of filtergrams of Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO) in λ160 nm and (iii) series of magnetograms of Helioseismic and Magnetic Imager (HMI) of SDO have been processed to reveal reliably the existence of spatial cellular structures on the solar photosphere at scale about of 300 arcsec. This scale is intermediate between supergranules and giant cells (∼30,000 and ∼300,000 km across, respectively). To identify the different spatial structures the tens of two-dimensional power spectra (2DFFT) have been averaged. For one-dimensional photometric cross sections of frames, the Fourier power spectra (FFT) and wavelet transforms (Morlet 5-th order) have been calculated.
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Acknowledgements
We thank the SDO and PSPT teams for the opportunity to use the observation data. This work was supported by the Presidium of the Russian Academy of Sciences, project P-9, and by the Russian Foundation for Basic Research, project 13-02-00714.
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Efremov, V.I., Parfinenko, L.D. & Solov’ev, A.A. Identification of large-scale cellular structures on the Sun based on the SDO and PSPT data. Astrophys Space Sci 356, 1–6 (2015). https://doi.org/10.1007/s10509-014-2195-1
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DOI: https://doi.org/10.1007/s10509-014-2195-1