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.
Similar content being viewed by others
References
Banin, V.G. and Yazev, S.A., Long activity platforms during the Ascending Phase of Cycle 21, Kinematika Fiz. Nebesnykh Tel, 1989, vol. 5, no. 4, pp. 62–68.
Cranmer, S.R., Coronal holes, Living Rev. Solar Phys., 2009, vol. 6, p. 3.
Duvall, T.L., Wilcox, J.M., et al., Comparison of H-alpha synoptic charts with the large-scale solar magnetic fields of observed of Stanford, Solar Phys., 1977, vol. 55, pp. 63–68.
Fainshtein, V.G., Stepanyan, N.N., et al., Properties of the Magnetic Fields of Coronal Holes with Active Regions, Bull. Crimean Astrophys. Observatory, 2010, vol. 106, no. 1, pp. 7–16.
Harvey, J.W. and Sheeley, N.R., Coronal holes and solar magnetic fields, Space. Sci. Revs., 1979, vol. 23, pp. 139–158.
Ikhsanov, R.N. and Ivanov, V.G., Properties of space and time distribution of solar coronal holes, Solar Phys., 1999, vol. 188, pp. 245–258.
Ikhsanov, R.N. and Tavastsherna, K.S., Features of latitudinal and longitudinal evolution of coronal holes in 11-year sunspot cycles, in Trudy konferentsii “Solnechnaya i solnechno-zemnaya fizika-2010” (Proc. the Symposium “Solar and Solar-Terrestrial Physics-2010”), St. Petersburg, Pulkovo, 2010, pp. 175–178.
Insley, J.W., Moore, V., and Harrison, R.A., The differential rotation of the corona as indicated by coronal holes, Solar Phys., 1995, vol. 160, pp. 1–18.
Makarov, V.I. and Stoyanova, M.N., Comparison of the polarity distributions of a background magnetic field in Hα charts with magnetographic observations of the Sun, S.D., 1982, no. 11, pp. 84–87.
Makarov, V.I., Stoyanova, M.N., and Sivaraman, K.R., Morphology of H-alpha filaments and filament channel systems, J. Astrophys. Astron., 1982, vol. 3, pp. 379–382.
Makarov, V.I., Technique for H-α charting of a large-scale structure in the chromosphere, S.D., 1984, no. 6, pp. 59–61.
Mc Intosh, P.S., Large-Scale Solar Magnetic Fields and H-alpha Patterns, Solar Wind, Sonnet, P.J., Coleman P.J., et al., Eds., Washington, 1972a, pp. 136–140.
Mc Intosh, P.S., Solar magnetic fields derived from H-alpha filtergrams, Rev. Geophys. Space Phys., 1972b, vol. 10, pp. 837–846.
Mc Intosh, P.S., H-alpha synoptic charts of solar activity for the period of Skyleb observations May 1973 March 1974, World Data Cent/F/Solar Terr. Phys. Rept., 1974, no. 40, pp. 1–35.
Mordvinov, A.V. and Yazev, S.A., Decay of activity complexes and the formation of coronal holes, Astron. Rep., 2013, vol. 57, no. 6, pp. 448–457.
Mordvinov, A.V. and Yazev, S.A., Reversals of the sun’s polar magnetic fields in relation to activity complexes and coronal holes, Solar Phys., 2014, vol. 289, pp. 1971–1981.
Obridko, V.N. and Shelting, B.D., Coronal holes as indicators of large-scale magnetic fields in the corona, Solar Phys., 1989, vol. 124, pp. 73–80.
Sanchez-Ibarra, A. and Barraza-Paredes, M., Catalogue of coronal holes, 1970–1991. Report UAG-102, Boulder, 1992.
Tlatov, A., Tavastsherna, K., and Vasil’eva, V., Coronal holes in solar cycles 21 to 23, Solar Phys., 2014, vol. 289, pp. 1349–1358.
Wang, Y.-M. and Sheeley, N.R., Solar wind speed and coronal flux-tube expansion, Astrophys. J., 1990, vol. 355, pp. 726–732.
Yazev, S.A., AC core catalogue, 2012, http://ru.iszf.irk.ru.
Yazev, S.A. and Rozhina, A.I., To the question about early identification of activity complexes on the Sun, in Trudy IV S”ezda Astronomicheskogo obshchestva (Proc. IV Congress of the Astronomical Society), Moscow, 1998, pp. 287–291.
Yazev, S.A., Coronal Holes and Activity Complexes on the Sun, Izv. Irkutsk. Gos. Univ., 2010, vol. 3, pp. 226–241.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Tavastsherna, K.S., Polyakow, E.V. Coronal holes, large-scale magnetic field, and activity complexes in solar cycle 23. Geomagn. Aeron. 54, 953–958 (2014). https://doi.org/10.1134/S0016793214070135
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0016793214070135