NDLI: Coronal holes, large-scale magnetic field, and activity complexes in solar cycle 23

Content Provider	Springer Nature Link
Author	Tavastsherna, K. S. Polyakow, E. V.
Copyright Year	2014
Abstract	A correlation among coronal holes (CH), a large-scale magnetic field (LMF), and activity complexes (AC) is studied in this work for 1997–2007 with the use of a coronal hole series obtained from observations at the Kitt Peak Observatory in the HeI 10830 Å line in 1975–2003 and SOHO/EIT-195 Å in 1996–2012 (Tlatov et al., 2014), synoptic Hα charts from Kislovodsk Mountain Astonomical Station, and the catalog of AC cores (Yazev, 2012). From the imposition of CH boundaries on Hα charts, which characterize the positions of neutral lines of the radial components of a large-scale solar magnetic field, it turns out that 70% of CH are located in unipolar regions of their sign during the above period, 10% are in the region of an opposite sign, and 20% are mainly very large CH, which are often crossed by the neutral lines of several unipolar regions. Data on mutual arrangement of CH and AC cores were obtained. It was shown that only some activity comples cores have genetic relationships with CH.
Starting Page	953
Ending Page	958
Page Count	6
File Format	PDF
ISSN	00167932
Journal	Geomagnetism and Aeronomy
Volume Number	54
Issue Number	7
e-ISSN	1555645X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-11-23
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Geophysics Space and Planetary Science

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