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Differentiating the Acceleration Mechanisms in the Slow and Alfvénic Slow Solar Wind
The Astrophysical JournalIn the corona, plasma is accelerated to hundreds of kilometers per second and heated to temperatures hundreds of times hotter than the Sun's surface before it escapes to form the solar wind.
Yeimy J. Rivera +20 more
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Astronomy & Astrophysics, 2023 Context. The origin of the slow solar wind is still an open issue. One possibility that has been suggested is that upflows at the edge of an active region can contribute to the slow solar wind. Aims. We aim to explain how the plasma upflows are generated, which mechanisms are responsible for them, and what the upflow region topology looks like. Methods.
Barczynski, Krzysztof +18 more
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A MODEL FOR THE SOURCES OF THE SLOW SOLAR WIND [PDF]
The Astrophysical Journal, 2011 Models for the origin of the slow solar wind must account for two seemingly contradictory observations: The slow wind has the composition of the closed field corona, implying that it originates from the continuous opening and closing of flux at the boundary between open and closed field. On the other hand, the slow wind also has large angular width, up
Antiochos, S. K. +4 more
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Formation of Heliospheric Arcs of Slow Solar Wind [PDF]
The Astrophysical Journal Letters, 2017 Abstract A major challenge in solar and heliospheric physics is understanding the origin and nature of the so-called slow solar wind. The Sun’s atmosphere is divided into magnetically open regions, known as coronal holes, where the plasma streams out freely and fills the solar system, and closed regions, where the plasma is confined to ...
A. K. Higginson +4 more
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Boundary of the Slow Solar Wind [PDF]
The Astrophysical Journal, 2018 Abstract This work argues that there are two fundamental states of the nontransient solar wind, and that these can be distinguished by a number of criteria. Here we define the states, which will be termed slow and fast, or SSW and FSW, for lack of better terms, by the level of velocity fluctuations, δv, in them, with the slow wind having
Yuan-Kuen Ko +2 more
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The origin of slow Alfvénic solar wind at solar minimum [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT Although the origins of slow solar wind are unclear, there is increasing evidence that at least some of it is released in a steady state on overexpanded coronal hole magnetic field lines. This type of slow wind has similar properties to the fast solar wind, including strongly Alfvénic fluctuations.
D Stansby +5 more
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Origins of the Slow and the Ubiquitous Fast Solar Wind [PDF]
The Astrophysical Journal, 1997 15 pages, LaTex, 6 jpg figures, accepted Aug.
Habbal, S. R. +6 more
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Standing Shocks in the Inner Slow Solar Wind [PDF]
Chinese Physics Letters, 2011 4 pages, 3 figures, accepted by Chinese Physics Letters, volume 28, number 5, id ...
Li, Bo, Chen, Yan-Jun, Li, Xing
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Origin and Acceleration of the Slow Solar Wind [PDF]
The Astrophysical Journal, 2005 This Letter uses Doppler dimming measurements by SOHO UVCS to elucidate the origin and acceleration of the slow solar wind. By investigating plasma flow in the corona over an active region during 2000 May 14-16, we confirm what has been suggested by the presence of the imprint of active regions in the solar wind near Earth orbit, that active regions ...
Richard Woo, Shadia Rifai Habbal
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Source regions of the slow solar wind [PDF]
Geophysical Research Letters, 1997 While the fast solar wind is generally thought to originate from coronal holes, the source of the slow solar wind is only known to be associated with the highly structured and highly variable streamer belt. There is growing evidence from multiple‐station intensity scintillation measurements of solar wind velocity—often referred to as IPS for ...
Richard Woo, Jan M. Martin
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