We analytically combine stress‐free current sheets with a coronal magnetostatic bulk current model. We begin by imposing a current sheet at the equator as an upper boundary condition on the modeled coronal field. We find that in order to reproduce the sharp gradients across the boundaries of helmet streamers, we also have to add current sheets along the interface between open and closed field lines. We find a description of coronal magnetic field and density in the presence of both bulk and sheet currents that matches both white light and photospheric magnetic flux observations.
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Gibson et al. (1996) studied this question.