Analyses and modelling of coronal holes observed by CORONAS-1. I. Morphology and magnetic field configuration
Abstract
Two low-latitude coronal holes observed by CORONAS-1 in April and June 1994 are analysed together with magnetic field measurements obtained from Wilcox and Kitt Peak Solar Observatories. To estimate the comparable temperature of these two coronal holes, the YOHKOH observations are also utilized. Using this information, we have constructed three-dimensional magnetic field lines to illustrate the geometrical configuration of these coronal holes. The calculated synoptic maps are used to determine the existence of closed and open field regions of the hole. Finally, we have correlated the characteristics of two coronal holes with the observed solar wind speed. We found that the brighter coronal hole has a high-speed solar wind, and the dimmer coronal hole has a low-speed solar wind.
- Publication:
-
Astronomical and Astrophysical Transactions
- Pub Date:
- 2000
- DOI:
- 10.1080/10556790008208176
- Bibcode:
- 2000A&AT...18..819O
- Keywords:
-
- Sun-coronal holes;
- solar wind