Longitudinal flows in stellar magnetic flux tubes |
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| Affiliation: | 1. Center for Neuroscience University of Pittsburgh, United States;2. Departments of Neurobiology, University of Pittsburgh School of Medicine, United States;3. Cell Biology, University of Pittsburgh School of Medicine, United States;4. Immunology, University of Pittsburgh School of Medicine, United States;1. Indian Institute of Astrophysics, Bengaluru 560034, India;2. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA;1. College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China;2. Huaian Key Laboratory for Photoelectric Conversion and Energy Storage Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai’an 223300, Jiangsu, PR China;1. General Surgery Department, University Hospital, Universidad Autónoma de Nuevo León, Mexico;2. Emergency Department, University Hospital, Universidad Autónoma de Nuevo León, Mexico |
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| Abstract: | It is shown that if a thin, isolated and untwisted magnetic flux tube, consisting of a current-free core bounded by a thin current sheath, is in an ‘overall’ equilibrium in a stratified atmosphere, then there is, in general, a net upward force on the current sheath and a net downward force on the core or vice-versa. It is suggested that this effect may be used to model the Evershed flows in sunspots and other longitudinal flows in solar and stellar magnetic flux tubes. |
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