Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-23T14:48:17.442Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetic helicity ejections and coronal activity

Published online by Cambridge University Press:  18 July 2013

A. Nindos
A. Nindos*
Affiliation:
Section of Astrogeophysics, Physics Department, University of Ioannina, Ioannina GR-45110, Greece email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Magnetic helicity quantifies the degree of linkage and/or twistedness in the magnetic field. It is probably the only physical quantity which is approximately conserved even in resistive MHD. This makes it an ideal tool for the exploration of the physics of solar eruptions. In this article, I discuss the sources of magnetic helicity injected into active regions and I point out that coronal mass ejections (CMEs) are probably necessary to remove at least part of the excess helicity produced in the Sun. I also discuss the importance of magnetic helicity in the overall coronal evolution that may lead to eruptions.

Keywords

Sun: activitySun: magnetic fieldsSun: coronal mass ejections (CMEs)Sun: flares
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 519 - 530
Copyright
Copyright © International Astronomical Union 2013 

References

Antiochos, S. K., DeVore, C. R., & Klimchuk, J. A. 1999, ApJ, 510, 485 Google Scholar
Amari, T., Luciani, J. F., Aly, J. J., Mikic, Z., & Linker, J. 2003a, ApJ, 585, 1073 Google Scholar
Amari, T., Luciani, J. F., Aly, J. J., Mikic, Z., & Linker, J. 2003b, ApJ, 595, 1231 Google Scholar
Berger, M. A. 1984, Geophys. Astrophys. Fluid Dyn., 30, 79 Google Scholar
Berger, M. A. 1985, ApJS, 59, 433 CrossRefGoogle Scholar
Berger, M. A. 1988, A&A, 201, 355 Google Scholar
Berger, M. A., & Field, G. B. 1984, J. Fluid Mech., 147, 133 Google Scholar
Chae, J. 2001 ApJ (Letters), 560, L95 Google Scholar
Chae, J. 2007, Adv. Sp. Res., 39, 1700 Google Scholar
Chae, J., Moon, Y.-J., & Park, Y.-D. 2004, Solar Phys., 223, 39 CrossRefGoogle Scholar
Démoulin, P. 2007, Adv. Sp. Res., 39, 1674 Google Scholar
Démoulin, P. & Berger, M. A. 2003, Solar Phys., 215, 203 CrossRefGoogle Scholar
Démoulin, P. & Pariat, E. 2009, Adv. Sp. Res., 43, 1013 CrossRefGoogle Scholar
Démoulin, P., Mandrini, C. H., van Driel-Gesztelyi, L., Lopez-Fuentes, M.C, & Aulanier, G. 2002a Solar Phys., 207, 87 Google Scholar
Démoulin, P., Mandrini, C. H., van Driel-Gesztelyi, L., et al. 2002b A&A, 382, 650 Google Scholar
DeVore, R. C. 2000, ApJ, 539, 944 CrossRefGoogle Scholar
Finn, J. H., & Antonsen, T. M. J. 1985, Comments Plasma Phys. Contr. Fus., 9, 111 Google Scholar
Georgoulis, M. K., & LaBonte, B. J. 2006, ApJ, 636, 475 Google Scholar
Georgoulis, M. K., & LaBonte, B. J. 2007, ApJ, 671, 1034 Google Scholar
Georgoulis, M. K., Tziotziou, K., & Raouafi, N. 2012, ApJ, 759, 1 Google Scholar
Green, L. M., Lopez-Fuentes, M. C., Mandrini, C. H., et al. 2002, Solar Phys., 208, 43 Google Scholar
Jacobs, C., Poedts, S., & van der Holst, B. 2006, A&A, 450, 793 Google Scholar
Kliem, B., Török, T. 2006, Phys. Rev. Lett., 96, 255002 Google Scholar
Kliem, B., Török, T., & Thompson, W.T. 2012 Solar Phys., in pressGoogle Scholar
Kliem, B., Rust, S., & Seehafer, N. 2011 in: Bonano, A., de Gouveia Dal Pino, E., & Kosovichev, A. G. (eds.) Proceedings IAU Symposium No. 274, 125 Google Scholar
Kusano, K., Maeshiro, T., Yokoyama, T., & Sakurai, T. 2002, ApJ, 577, 501 Google Scholar
Kusano, K., Yokoyama, T., Maeshiro, T., & Sakurai, T. 2003, Adv. Space Res., 32, 1931 Google Scholar
Kusano, K., Maeshiro, T., Yokoyama, T., & Sakurai, T. 2004, ApJ, 610, 537 Google Scholar
LaBonte, B. J., Georgoulis, M. K., & Rust, D. M. 2007, ApJ, 671, 955 Google Scholar
Lim, E.-K., Jeong, H., Chae, J., & Moon, Y.-J. 2007, ApJ, 656, 1167 Google Scholar
Liu, Y. & Schuck, P. W. 2012 ApJ, in pressGoogle Scholar
Longcope, D.W. 2004, ApJ, 612, 1181 Google Scholar
Low, B. C. 1996, Solar Phys., 167, 217 Google Scholar
Low, B. C. & Zhang, M. 2002 ApJ (Letters), 564, L53 Google Scholar
MacNeice, P., Antiochos, S. K., Phillips, A., et al. 2004, ApJ, 614, 1028 Google Scholar
Mandrini, C. H., Pohjolainen, S., Dasso, S., et al. 2005, A&A, 434, 725 Google Scholar
Moon, Y.-J., Chae, J., Choe, G. S., et al. 2002a ApJ, 574, 1066 Google Scholar
Moon, Y.-J., Chae, J., Wang, H., Choe, G. S., & Park, Y. D. 2002b ApJ, 580, 528 Google Scholar
Moore, R. L., Sterling, A. C., Hudson, H. S., & Lemen, J. R. 2001, ApJ, 552, 883 CrossRefGoogle Scholar
Nindos, A. & Zhang, H. 2002 ApJ (Letters), 573, L133 Google Scholar
Nindos, A., Zhang, J., & Zhang, H. 2003, ApJ, 594, 1033 Google Scholar
Nindos, A. & Andrews, M. D. 2004 ApJ (Letters), 616, L175 CrossRefGoogle Scholar
Nindos, A., Patsourakos, S., & Wiegelmann, T. 2012, ApJ (Letters), 748, L6 Google Scholar
November, L. J. & Simon, G. W. 1988, ApJ, 333, 427 CrossRefGoogle Scholar
Pariat, E., Démoulin, P., & Berger, M. A. 2005, A&A, 439, 1191 Google Scholar
Pariat, E., Démoulin, P., & Nindos, A. 2007, Adv. Sp. Res., 39, 1706 Google Scholar
Pariat, E., Nindos, A., Démoulin, P., & Berger, M. A. 2006, A&A, 452, 623 Google Scholar
Pevtsov, A.A. 2000, ApJ, 553, 560 Google Scholar
Pevtsov, A.A., Canfield, R.C., & Metcalf, T.R. 1995 ApJ (Letters), 440, L109 CrossRefGoogle Scholar
Pevtsov, A. A., Canfield, R. C., & Latushko, S. M. 2001 ApJ (Letters), 549, L261 Google Scholar
Phillips, A. D., MacNeice, P. J., & Antiochos, S. K. 2005 ApJ (Letters), 624, L129 Google Scholar
Ravindra, B., Longcope, D. W., & Abbett, W. P. 2008, ApJ, 677, 751 Google Scholar
Rudenko, G. V. & Myshyakov, I.I. 2011, Solar Phys., 270, 165 Google Scholar
Rust, D. M. 1994, Geophys. Res. Lett., 21, 241 CrossRefGoogle Scholar
Rust, D. M. & Kumar, A. 1996, ApJ, 464, L199 Google Scholar
Schuck, P. W. 2006, ApJ, 646, 1358 Google Scholar
Schuck, P. W. 2008, ApJ, 683, 1134 Google Scholar
Thalmann, J. K., Inhester, B., & Wiegelmann, T. 2011, Solar Phys., 272, 243 Google Scholar
Tziotziou, K., Georgoulis, M. K. & Raouafi, N. 2012 ApJ (Letters), 779, L4 Google Scholar
Török, T. & Kliem, B. 2005, ApJ, 630, L97 Google Scholar
Valori, G., Démoulin, P., & Pariat, E. 2012, Solar Phys., 278, 347 Google Scholar
van Ballegooijen, A. A. & Martens, P. C. H. 1989, ApJ, 343, 971 Google Scholar
Welsch, B. T., Abbett, W. P., DeRosa, M. L., et al. 2007, ApJ, 670, 1434 Google Scholar
Welsch, B. T., Fisher, G. H., Abbett, W. P., & Regnier, S. 2004, ApJ, 610, 1148 Google Scholar
Zhang, M. & Low, B. C. 2001, ApJ, 561, 406 Google Scholar
Zhang, M. & Low, B. C. 2003, ApJ, 584, 479 Google Scholar
Zhang, M. & Flyer, N. 2008, ApJ, 683, 1160 Google Scholar
Zhang, M., Flyer, N., & Low, B.C. 2006, ApJ, 644, 575 Google Scholar
Zhang, M., Flyer, N., & Low, B. C. 2012, ApJ, 755, 78 Google Scholar
Zhang, Y., Kitai, R., & Takizawa, K. 2012, ApJ, 751, 85 Google Scholar
Zuccarello, F. P., Jacobs, C., Soenen, A., et al. 2009, A&A, 507, 441 Google Scholar