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Dependence of Solar Supergranular Lifetime on Surface Magnetic Activity and Rotation

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Abstract

The lifetimes and length-scales for supergranular cells in active and quiescent regions of the solar chromosphere, and the relation between the two, were studied using a time series of Ca II K filtergrams. The lifetimes, in contrast to supergranular length scale and fractal dimension, show no significant dependence on solar latitude, suggesting that cell lifetimes are independent of the differential rotation and a possible supergranular super-rotation. The functional form of the relation was obtained guided by a comparison of the distributions of the two supergranular parameters. We infer a linear dependence of cell lifetime on area, which can be understood by the assumption of the network’s evolution via a diffusion of the magnetic field. Our analysis suggests that the diffusion rate in quiet regions is about 10\(\%\) greater than in active regions.

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ACKNOWLEDGMENTS

We thank the referee for the careful review of our manuscript and the comments which helped us to improve the clarity and presentation of the paper.

Funding

This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. GSSS Institute of Engineering and Technology for Women, Metagalli, 570016, Mysuru, Karnataka, India

    G. M. Sowmya

  2. PES College of Engineering, 571401, Mandya, Karnataka, India

    G. Rajani

  3. Poornaprajna Institute of Scientific Research, Devanahalli, 562110, Bangalore, Karnataka, India

    U. Paniveni & R. Srikanth

Authors
  1. G. M. Sowmya
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  2. G. Rajani
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  3. U. Paniveni
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  4. R. Srikanth
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Correspondence to G. M. Sowmya.

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Sowmya, G.M., Rajani, G., Paniveni, U. et al. Dependence of Solar Supergranular Lifetime on Surface Magnetic Activity and Rotation. Astrophys. Bull. 78, 606–612 (2023). https://doi.org/10.1134/S1990341323600138

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  • DOI: https://doi.org/10.1134/S1990341323600138

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