Solar Physics

, Volume 153, Issue 1–2, pp 169–178 | Cite as

An observational study of coronal hole rotation over the sunspot cycle

  • Patricia Navarro-Peralta
  • Antonio Sanchez-Ibarra


An analysis of the rotation of coronal holes (CHs) spanning 18 years was done based on data from theCatalogue of Coronal Holes (Sanchez-Ibarra and Barraza-Paredes, 1992). A differential rotation of CHs is confirmed for the totality of CHs, but a different behavior was found when those were separated as equatorial or isolated, and polar hole extensions, such as in theCatalogue. Isolated CHs show a typical differential rotation, but polar hole extensions display two different types of behavior: a rotation rate below ∼40° ± 5° of heliographic latitude, increasing to the equator, and a rotation rate above the same heliographic latitude but increasing to the poles. Also discussed here is how this last result agrees with other studies that indicate the mostly rigid rotation of the corona at higher latitudes.


Solar Cycle Rotation Rate Solar Phys Coronal Hole Rotation Period 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Patricia Navarro-Peralta
    • 1
  • Antonio Sanchez-Ibarra
    • 2
  1. 1.Centro de Investigacion en Astronomia SolarCIASHermosillo SonoraMexico
  2. 2.Centro de Investigacion en FisicaUniversidad de SonoraHermosillo SonoraMexico

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