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• W3094848145 abstract "Context: Giant-cell convection is believed to be an important component of solar dynamics. For example, it is expected to play a crucial role in maintaining the Sun's differential rotation. Aims: We re-examine early reports of giant convective cells detected using correlation analysis of Dopplergrams. We extend this analysis using 19 years of space and ground-based observations of near-surface horizontal flows. Method: Flow maps are derived through local correlation tracking of granules and helioseismic ring-diagram analysis. We compute temporal auto-correlation functions of the east-west flows at fixed latitude. Results: Correlations in the east-west velocity can be clearly seen up to five rotation periods. The signal consists of features with longitudinal wavenumbers up to m=9 at low latitudes. Comparison with magnetic images indicates that these flow features are associated with magnetic activity. The signal is not seen above the noise level during solar minimum. Conclusions: Our results show that the long-term correlations in east-west flows at low latitudes are dominantly due to inflows into active regions and not to giant convective cells." @default.
• W3094848145 created "2020-11-09" @default.
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• W3094848145 date "2020-12-01" @default.
• W3094848145 modified "2023-10-10" @default.
• W3094848145 title "Solar east-west flow correlations that persist for months at low latitudes are dominated by active region inflows" @default.
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• W3094848145 doi "https://doi.org/10.1051/0004-6361/202039108" @default.
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