Relationship between the coronal holes and high-speed streams of solar wind

The relationship between two classes of coronal holes and high-speed quasi-stationary streams of solar wind at the Earth’s orbit is investigated. “Open” coronal holes, whose area is invariable or increases with the height over the solar surface, are rated in the first class, and “closed” coronal hol...

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Bibliographic Details
Published in:Solar system research 2008-02, Vol.42 (1), p.83-89
Main Authors: Stepanian, N. N., Kuzin, S. V., Fainshtein, V. G., Rudenko, G. V., Malashchuk, V. M., Perebeinos, V. A., Shtertser, N. I., Zhigalkin, R. K., Zhitnik, I. A., Pertsov, A. A.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Astrophysics and Cosmology
Observations and Techniques
Physics
Physics and Astronomy
Planetology
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Summary:The relationship between two classes of coronal holes and high-speed quasi-stationary streams of solar wind at the Earth’s orbit is investigated. “Open” coronal holes, whose area is invariable or increases with the height over the solar surface, are rated in the first class, and “closed” coronal holes with areas decreasing with the height are referred to as second-class holes. The parameters of the coronal holes are determined from IR and EUV images and spectroheliograms. It is shown that most open coronal holes can be associated with high-speed solar-wind streams, while most closed coronal holes exhibit a much lower correlation with such streams.
ISSN:0038-0946
1608-3423
DOI:10.1134/S0038094608010097