Solar Physics

, Volume 263, Issue 1–2, pp 135–152 | Cite as

Trans-Equatorial Loop System Arising from Coronal Hole Boundaries through Interactions between Active Regions and Coronal Holes

Article
First Online:
Received:
Accepted:

Abstract

It is not clear how trans-equatorial loop systems (TLSs) are formed, although they have been observed often with Yohkoh/SXT. We focus here on a TLS that appeared on 27 May 1998. Yokoyama and Masuda (Solar Phys. 254, 285, 2009) proposed a new scenario for the formation mechanism of the TLS. In this scenario, they pointed out the importance of magnetic interaction between an active region and a coronal hole to make “strong-seed magnetic fields” before a transient (bright and short-lived) trans-equatorial loop was created. The main aims of this study are to verify the scenario and to make the TLS formation mechanism clear, based on observational data. Yohkoh/SXT images, SOHO/MDI magnetograph data, and Kitt Peak coronal-hole maps were mainly used for our analyses. We investigated the TLS in detail from the time that there were no signatures of the TLS to its clear appearance. The following results are obtained: i) an active region emerged in the vicinity of a coronal-hole boundary, ii) the coronal-hole boundary retreated during the period when the active region was developing, iii) temporal variations of soft X-ray intensities were roughly synchronized between the coronal-hole boundary and a trans-equatorial region, and iv) new closed loops were observed in soft X-rays clearly at the coronal-hole boundary. Since i), ii), iii), and iv) are just what we expect in the scenario of YM2009, the scenario found support. We conclude that the TLS was originating with large-scale magnetic fields of the coronal-hole boundary through magnetic reconnection between the active region and a coronal hole.

Keywords

Active Region Solar Phys Coronal Hole Magnetic Reconnection Magnetic Interaction 
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.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Babcock, H.W.: 1961, Astrophys. J. 133, 752. CrossRefADSGoogle Scholar
  2. Baker, D., van Driel-Gesztelyi, L., Attrill, G.D.R.: 2007, Astron. Nachr. 328, 773. CrossRefADSGoogle Scholar
  3. Brueckner, G.E., Howard, R.A., Koomen, M.J., Korendyke, C.M., Michels, D.J., Moses, J.D., Socker, D.G., Dere, K.P., Lamy, P.L., Llebaria, A., Bout, M.V., Schwenn, R., Simnett, G.M., Bedford, D.K., Eyles, C.J.: 1995, Solar Phys. 162, 357. CrossRefADSGoogle Scholar
  4. Chen, P.F., Shibata, K.: 2000, Astrophys. J. 545, 524. CrossRefADSGoogle Scholar
  5. Chen, J., Bao, S., Zhang, H.: 2006, Solar Phys. 235, 281. CrossRefADSGoogle Scholar
  6. Crooker, N.U., Gosling, J.T., Kahler, S.W.: 2002, J. Geophys. Res. 107, 1028. CrossRefGoogle Scholar
  7. Domingo, V., Fleck, B., Poland, A.I.: 1995, Solar Phys. 162, 1. CrossRefADSGoogle Scholar
  8. Fárník, F., Švestka, Z.: 2002, Solar Phys. 206, 143. CrossRefADSGoogle Scholar
  9. Golub, L., Deluca, E., Austin, G., Bookbinder, J., Caldwell, D., Cheimets, P., Cirtain, J., Cosmo, M., Reid, P., Sette, A., Weber, M., Sakao, T., Kano, R., Shibasaki, K., Hara, H., Tsuneta, S., Kumagai, K., Tamura, T., Shimojo, M., McCracken, J., Carpenter, J., Haight, H., Siler, R., Wright, E., Tucker, J., Rutledge, H., Barbera, M., Peres, G., Varisco, S.: 2007, Solar Phys. 243, 63. CrossRefADSGoogle Scholar
  10. Gopalswamy, N., Mikić, Z., Maia, D., Alexander, D., Cremades, H., Kaufmann, P., Tripathi, D., Wang, Y.-M.: 2006, Space Sci. Rev. 123, 303. CrossRefADSGoogle Scholar
  11. Harra, L.K., Matthews, S.A., van Driel-Gesztelyi, L.: 2003, Astrophys. J. 598, L59. CrossRefADSGoogle Scholar
  12. Harvey, K.L., Recely, F.: 2002, Solar Phys. 211, 31. CrossRefADSGoogle Scholar
  13. Jiang, J., Choudhuri, A.R., Wang, J.: 2007, Solar Phys. 245, 19. CrossRefADSGoogle Scholar
  14. Kano, R., Sakao, T., Hara, H., Tsuneta, S., Matsuzaki, K., Kumagai, K., Shimojo, M., Minesugi, K., Shibasaki, K., Deluca, E.E., Golub, L., Bookbinder, J., Caldwell, D., Cheimets, P., Cirtain, J., Dennis, E., Kent, T., Weber, M.: 2008, Solar Phys. 249, 263. CrossRefADSGoogle Scholar
  15. Khan, J.I., Hudson, H.S.: 2000, Geophys. Res. Lett. 27, 1083. CrossRefADSGoogle Scholar
  16. Kosugi, T., Matsuzaki, K., Sakao, T., Shimizu, T., Sone, Y., Tachikawa, S., Hashimoto, T., Minesugi, K., Ohnishi, A., Yamada, T., Tsuneta, S., Hara, H., Ichimoto, K., Suematsu, Y., Shimojo, M., Watanabe, T., Shimada, S., Davis, J.M., Hill, L.D., Owens, J.K., Title, A.M., Culhane, J.L., Harra, L.K., Doschek, G.A., Golub, L.: 2007, Solar Phys. 243, 3. CrossRefADSGoogle Scholar
  17. Ogawara, Y., Takano, T., Kato, T., Kosugi, T., Tsuneta, S., Watanabe, T., Kondo, I., Uchida, Y.: 1991, Solar Phys. 136, 1. CrossRefADSGoogle Scholar
  18. Pevtsov, A.A.: 2000, Astrophys. J. 531, 553. CrossRefADSGoogle Scholar
  19. Pevtsov, A.A.: 2004, In: Stepanov, A.V., Benevolenskaya, E.E., Kosovichev, A.G. (eds.) Multi-Wavelength Investigations of Solar Activity, IAU Symp. 223, Cambridge University Press, Cambridge, 521. Google Scholar
  20. Saito, T., Sun, W., Deehr, C.S., Akasofu, S.-I.: 2007, J. Geophys. Res. 112, A05102. CrossRefGoogle Scholar
  21. Sakurai, T., Uchida, Y.: 1977, Solar Phys. 52, 397. CrossRefADSGoogle Scholar
  22. Scherrer, P.H., Bogart, R.S., Bush, R.I., Hoeksema, J.T., Kosovichev, A.G., Schou, J., Rosenberg, W., Springer, L., Tarbell, T.D., Title, A., Wolfson, C.J., Zayer, I., MDI Engineering Team: 1995, Solar Phys. 162, 129. CrossRefADSGoogle Scholar
  23. Shibata, K., Masuda, S., Shimojo, M., Hara, H., Yokoyama, T., Tsuneta, S., Kosugi, T., Ogawara, Y.: 1995, Astrophys. J. 451, L83. CrossRefADSGoogle Scholar
  24. Shimojo, M., Shibata, K.: 2000, Astrophys. J 542, 1100. CrossRefADSGoogle Scholar
  25. Shimojo, M., Shibata, K., Yokoyama, T., Hori, K.: 2001, Astrophys. J. 550, 1051. CrossRefADSGoogle Scholar
  26. Shimojo, M., Narukage, N., Kano, R., Sakao, T., Tsuneta, S., Shibasaki, K., Cirtain, J.W., Lundquist, L.L., Reeves, K.K., Savcheva, A.: 2007, Publ. Astron. Soc. Japan 59, S745. Google Scholar
  27. Švestka, Z., Skrieger, A.S., Chase, R.C., Howard, R.: 1977, Solar Phys. 52, 69. CrossRefADSGoogle Scholar
  28. Tsuneta, S.: 1996a, Astrophys. J. 456, L63. ADSGoogle Scholar
  29. Tsuneta, S.: 1996b, Astrophys. J. 456, 840. CrossRefADSGoogle Scholar
  30. Tsuneta, S., Acton, L., Bruner, M., Lemen, J., Brown, W., Caravalho, R., Catura, R., Freeland, S., Jurcevich, B., Owens, J.: 1991, Solar Phys. 136, 37. CrossRefADSGoogle Scholar
  31. van Driel-Gesztelyi, L.: 2006, In: Bothmer, V., Handy, A.A. (eds.) Solar Activity and Its Magnetic Origin, IAU Symp. 223, Cambridge University, Cambridge, 205. Google Scholar
  32. van Driel-Gesztelyi, L., Attrill, G.D.R., Démoulin, P., Mandrini, C.H., Harra, L.K.: 2008, Ann. Geophys. 26, 3077. ADSCrossRefGoogle Scholar
  33. Wang, Y.M., Hawley, S.H., Sheeley, N.R. Jr.: 1996, Science 271, 464. CrossRefADSGoogle Scholar
  34. Wang, J., Zhang, Y., Zhou, G., Harra, L.K., Williams, D.R., Jiang, Y.: 2007, Solar Phys. 244, 75. CrossRefADSGoogle Scholar
  35. Yashiro, S., Gopalswamy, N., Michalek, G., St. Cyr, O.C., Plunkett, S.P., Rich, N.B., Howard, R.A.: 2004, J. Geophys. Res. 109, A07105. CrossRefGoogle Scholar
  36. Yokoyama, M., Masuda, S.: 2009, Solar Phys. 254, 285. (YM2009). CrossRefADSGoogle Scholar
  37. Yokoyama, T., Shibata, K.: 1995, Nature 375, 42. CrossRefADSGoogle Scholar
  38. Zhou, G.P., Wang, J.X., Zhang, J.: 2006, Astron. Astrophys. 445, 1133. CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Solar-Terrestrial Environment LaboratoryNagoya UniversityNagoyaJapan

Personalised recommendations