Helmet streamers during a total solar eclipse, photographed using exposure bracketing to show both the Sun's corona and the surface features of the new moon itself, illuminated by earthshine. A few solar prominences are visible around the lunar limb.
Helmet streamers, also known as coronal streamers, are elongated cusp-like structures in the Sun's corona which are often visible in white-light coronagraphs and during solar eclipses. They are closed magnetic loops which lie above divisions between regions of opposite magnetic polarity on the Sun's surface. The solar wind elongates these loops to pointed tips which can extend a solar radius or more into the corona.[1]
During solar minimum, helmet streamers are found closer to the heliographic equator, whereas during solar maximum they are found more symmetrically distributed around the Sun.
^Kallenrode, May-Britt (2004). Space Physics: An Introduction to Plasmas and Particles in the Heliosphere and Magnetospheres. Berlin: Springer. p. 145. ISBN 3-540-20617-5.
Helmetstreamers, also known as coronal streamers, are elongated cusp-like structures in the Sun's corona which are often visible in white-light coronagraphs...
of circulating air left behind a wing, also called wingtip vortices Helmetstreamers and pseudostreamers, a bright loop-like structures found over an active...
magnetic field cannot occur, and the magnetic topology is preserved. Helmetstreamer#Pseudostreamers Longcope, Dana W. (2005). "Topological Methods for...
field may extend radially outward, forming what is known as a helmetstreamer. These streamers may reach a solar radius or more above the Sun's surface. Filament...
region Coronal hole Coronal loop Coronal mass ejection Solar prominence Helmetstreamer Solar variation Solar cycle List of solar cycles Solar maximum Solar...
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eclipses. They appeared as dark regions surrounded by much brighter helmetstreamers above the Sun's limb. In the 1960s, coronal holes appeared in X-ray...
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(physics) Heliosphere Heliospheric current sheet Helium Helium line ratio Helmetstreamer Hessdalen light High beta fusion reactor High-energy nuclear physics...
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are helmetstreamers – large, cap-like coronal structures with long, pointed peaks that usually overlie sunspots and active regions. Coronal streamers are...
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of two T Tauri stars: first observational evidence for solar-like helmetstreamers", Astronomy and Astrophysics, 480 (2): 489–494, arXiv:0712.0718, Bibcode:2008A&A...
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