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The boundaries of solar coronal holes are difficult to uniquely define observationally but are sites of interest in part because the slow solar wind appears to originate there. The aim of this article is to explore the dynamics of interchange magnetic reconnection at different types of coronal hole boundaries- namely streamers and pseudostreamers-and their implications for the coronal structure. We describe synthetic observables derived from three-dimensional magnetohydrodynamic simulations of the atmosphere of the Sun in wh ...
Published by: \apj Published on: jun
YEAR: 2022   DOI: 10.3847/1538-4357/ac69ed
The slow solar wind is generally believed to result from the interaction of open and closed coronal magnetic flux at streamers and pseudostreamers. We use three-dimensional magnetohydrodynamic simulations to determine the detailed structure and dynamics of open-closed interactions that are driven by photospheric convective flows. The photospheric magnetic field model includes a global dipole giving rise to a streamer together with a large parasitic polarity region giving rise to a pseudostreamer that separates a satellite co ...
Published by: \apj Published on: apr
YEAR: 2022   DOI: 10.3847/1538-4357/ac5d5b
Parker Data Used; Solar Physics; Solar magnetic reconnection; Solar corona; Solar coronal holes; Magnetohydrodynamics; Slow solar wind; 1476; 1504; 1483; 1484; 1964; 1873; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics
Streamers and pseudostreamers structure the corona at the largest scales, as seen in both eclipse and coronagraph white-light images. Their inverted-goblet appearance encloses broad coronal loops at the Sun and tapers to a narrow radial stalk away from the star. The streamer associated with the global solar dipole magnetic field is long-lived, predominantly contains a single arcade of nested loops within it, and separates opposite-polarity interplanetary magnetic fields with the heliospheric current sheet (HCS) anchored at i ...
Published by: The Astrophysical Journal Published on: 05/2021
YEAR: 2021   DOI: 10.3847/1538-4357/abec4f