Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-19T13:17:43.872Z Has data issue: false hasContentIssue false
  • English
  • Français
Rights & Permissions [Opens in a new window]

Extract

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.

Commission 10 of the International Astronomical Union has more than 650 members who study a wide range of activity phenomena produced by our nearest star, the Sun. Solar activity is intrinsically related to solar magnetic fields and encompasses events from the smallest energy releases (nano- or even picoflares) to the largest eruptions in the Solar System, coronal mass ejections (CMEs), which propagate into the Heliosphere reaching the Earth and beyond. Solar activity is manifested in the appearance of sunspot groups or active regions, which are the principal sources of activity phenomena from the emergence of their magnetic flux through their dispersion and decay. The period 2008–2009 saw an unanticipated extended solar cycle minimum and unprecedentedly weak polar-cap and heliospheric field. Associated with that was the 2009 historical maximum in galactic cosmic rays flux since measurements begun in the middle of the 20th Century. Since then Cycle 24 has re-started solar activity producing some spectacular eruptions observed with a fleet of spacecraft and ground-based facilities. In the last triennium major advances in our knowledge and understanding of solar activity were due to continuing success of space missions as SOHO, Hinode, RHESSI and the twin STEREO spacecraft, further enriched by the breathtaking images of the solar atmosphere produced by the Solar Dynamic Observatory (SDO) launched on 11 February 2010 in the framework of NASA's Living with a Star program. In August 2012, at the time of the IAU General Assembly in Beijing when the mandate of this Commission ends, we will be in the unique position to have for the first time a full 3-D view of the Sun and solar activity phenomena provided by the twin STEREO missions about 120 degrees behind and ahead of Earth and other spacecraft around the Earth and ground-based observatories. These new observational insights are continuously posing new questions, inspiring and advancing theoretical analysis and modelling, improving our understanding of the physics underlying magnetic activity phenomena. Commission 10 reports on a vigorously evolving field of research produced by a large community. The number of refereed publications containing ‘Sun’, ‘heliosphere’, or a synonym in their abstracts continued the steady growth seen over the preceding decades, reaching about 2000 in the years 2008–2010, with a total of close to 4000 unique authors. This report, however, has its limitations and it is inherently incomplete, as it was prepared jointly by the members of the Organising Committee of Commission 10 (see the names of the primary contributors to the sections indicated in parentheses) reflecting their fields of expertise and interest. Nevertheless, we believe that it is a representative sample of significant new results obtained during the last triennium in the field of solar activity.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Transactions T28A: Transactions IAU , December 2011 , pp. 69 - 80
Copyright
Copyright © International Astronomical Union 2012

References

Amari, T., Aly, J.-J., Mikic, Z., & Linker, J. 2010, ApJL, 717, L26CrossRefGoogle Scholar
Antiochos, S. K., Mikić, Z., Titov, V. S., Lionello, R., & Linker, J. A. 2011, ApJ, 731, 112CrossRefGoogle Scholar
Aschwanden, M. J., 2009, Space Sci. Rev., 149, 31CrossRefGoogle Scholar
Aschwanden, M. J. 2011, Living Rev. Sol. Phys. lsrp-11-5Google Scholar
Aschwanden, M. J., Nitta, N. V., Wülser, J.-P., & Lemen, J. R. 2008, ApJ, 680, 1477CrossRefGoogle Scholar
Aulanier, G., Török, T., Démoulin, P. & DeLuca, E. E. 2010, ApJ, 708, 314CrossRefGoogle Scholar
Baker, D., van Driel-Gesztelyi, L., Mandrini, C. H., Démoulin, P., & Murray, M. J. 2009, ApJ, 705, 926CrossRefGoogle Scholar
Barbey, N., Guennou, C., & Auchére, F. 2011, Sol. Phys., in press, DOI: 10.1007/s11207-011-9792-8Google Scholar
Bemporad, A., Del Zanna, G., & Andretta, V. et al. 2009, Ann. Geophys., 27, 3841CrossRefGoogle Scholar
Bian, N. H., Kontar, E. P., & Brown, J. C. 2010, A&A, 519, A114Google Scholar
Birn, J., Fletcher, L., Hesse, M., & Neukirch, T. 2009, ApJ, 695, 1151CrossRefGoogle Scholar
Brooks, D. H. & Warren, H. P. 2011, ApJL, 727, L13CrossRefGoogle Scholar
Brown, B. P., Miesch, M. S., Browning, M. K., Brun, A. S., & Toomre, J. 2011, ApJ. 731, 69CrossRefGoogle Scholar
Brown, J. C., Turkmani, R., & Kontar, E. P. et al. , 2009, A&A, 508, 993Google Scholar
Bryans, P., Young, P. R., & Doschek, G. A. 2010, ApJ, 715, 1012CrossRefGoogle Scholar
Butala, M. D., Hewett, R. J., Frazin, R. A., & Kamalabadi, F. 2010, Sol. Phys., 262, 495CrossRefGoogle Scholar
Cameron, R., Gizon, L., & Duvall, T. L. Jr. 2008, Sol. Phys., 251, 291CrossRefGoogle Scholar
Ciaravella, A. & Raymond, J. C. 2008, ApJ, 686, 1372CrossRefGoogle Scholar
Chen, B., Bastian, T. S., Gary, D. E., & Jing, J. 2011, ApJ, 736, 64CrossRefGoogle Scholar
Cheng, X., Zhang, J., Liu, Y., & Ding, M. D. 2011, ApJL, 732, L25CrossRefGoogle Scholar
Cheung, M. C. M., Rempel, M., Title, A. M., & Schüssler, M. 2010, ApJ, 720, 233CrossRefGoogle Scholar
Chernov, G. P., Yan, Y. H., Tan, C. M., Chen, B., & Fu, Q. J. 2010, Sol. Phys., 262, 149CrossRefGoogle Scholar
Cliver, E. W. & Ling, A. G. 2009, ApJ, 690, 598CrossRefGoogle Scholar
Dadashi, N., Teriaca, L., & Solanki, S. K. 2011, A&A, 534, A90Google Scholar
Del Zanna, G., 2008, A&A, 481, L49Google Scholar
Del Zanna, G., Aulanier, G., Klein, K.-L., & Török, T. 2011, A&A, 526, A137Google Scholar
Démoulin, P. & Aulanier, G. 2010, ApJ, 718, 1388CrossRefGoogle Scholar
Dennis, B. R. & Pernak, R. L. 2009, ApJ, 698, 2131CrossRefGoogle Scholar
Des Jardins, A., Canfield, R., Longcope, D., Fordyce, C., & Waitukaitis, S. 2009, ApJ, 693, 1628CrossRefGoogle Scholar
Dikpati, M., Gilman, P. A., de Toma, G., & Ulrich, R. K. 2010, GRL 371, L14107Google Scholar
Doschek, G. A., Warren, H. P., & Mariska, J. T., et al. , 2008, ApJ, 686, 1362CrossRefGoogle Scholar
Dzifćáková, E. & Kulinová, A. 2010, Sol. Phys., 263, 25CrossRefGoogle Scholar
Fan, Y. 2011, ApJ, 740, 68CrossRefGoogle Scholar
Feng, L., Inhester, B., & Solanki, S. K., et al. 2009, ApJ, 700, 292CrossRefGoogle Scholar
Fisk, L. A. 2005, ApJ, 626, 563CrossRefGoogle Scholar
Frazin, R. A., Jacob, M., & Manchester, W. B. IV et al. , 2009a, ApJ, 695, 636CrossRefGoogle Scholar
Frazin, R. A., Vásquez, A. M., & Kamalabadi, F. 2009b, ApJ, 701, 547CrossRefGoogle Scholar
Frazin, R. A., Lamy, P., Llebaria, A., & Vásquez, A. M. 2010, Sol. Phys., 265, 19CrossRefGoogle Scholar
Fröhlich, C. 2009, A&A 501, L27Google Scholar
Gallagher, P. T. & Long, D. M. 2011, Space Sci. Rev. 158, 365CrossRefGoogle Scholar
Ghizaru, M., Charbonneau, P., & Smolarkiewicz, P. K. 2010, ApJ, 715, L133CrossRefGoogle Scholar
Gordovskyy, M., Browning, P. K., & Vekstein, G. E. 2010, ApJ, 720, 1603CrossRefGoogle Scholar
Graham, D. R., Fletcher, L., & Hannah, I. G. 2011, A&A, 532, A27Google Scholar
Green, L. M., Kliem, B., & Wallace, A. J. 2011, A&A, 526, A2Google Scholar
Hannah, I. G. & Kontar, E. P. 2011, A&A, 529, A109Google Scholar
Hansteen, V. H., Hara, H., De Pontieu, B., & Carlsson, M. 2010, ApJ, 718, 1070CrossRefGoogle Scholar
Harra, L. K., Sakao, T., & Mandrini, C. H., et al. , 2008, ApJL, 676, L147CrossRefGoogle Scholar
Harra, L. K., Sterling, A. C., Gömöry, P., & Veronig, A. 2011, ApJL 737, L4CrossRefGoogle Scholar
Hathaway, D. H. & Rightmire, L. 2011, ApJ, 729, 80CrossRefGoogle Scholar
Hood, A. W., Archontis, V., Galsgaard, K. & Moreno-Insertis, F. 2009, A&A, 503, 999Google Scholar
Hood, A. W., Archontis, V. & MacTaggart, D. 2011, Sol. Phys., 157Google Scholar
Jess, D. B., Mathioudakis, M., Crockett, P. J., & Keenan, F. P. 2008, ApJ, 688, L119CrossRefGoogle Scholar
Jiang, J., Cameron, R., Schmitt, D., & Schüssler, M. 2009, Astrophys. J. 693, L96CrossRefGoogle Scholar
Jiang, Y., Yang, J., Hong, J., Bi, Y., & Zheng, R. 2011, ApJ, 738, 179CrossRefGoogle Scholar
Jin, M., Manchester, W. B. & Van der Holst, B., et al. 2011, ApJ, in pressGoogle Scholar
Jing, J., Chen, P. F., Wiegelmann, T., Xu, Y., Park, S.-H., & Wang, H. 2009, ApJ, 696, 84CrossRefGoogle Scholar
Jing, J., Tan, C., & Yuan, Y., et al. , 2010, ApJ, 713, 440CrossRefGoogle Scholar
Käpylä, P. J., Korpi, M. J., & Brandenburg, A. et al. , 2010, Astron. Nachr. 331, 73CrossRefGoogle Scholar
Karlický, M. & Bárta, M. 2011, ApJ, 733, 107CrossRefGoogle Scholar
Kaufmann, P., Trottet, G. & Giménez de Castro, C. G., et al. , 2009, Sol. Phys., 255, 131CrossRefGoogle Scholar
Klein, K.-L., Trottet, G., & Klassen, A. 2010, Sol. Phys., 263, 185CrossRefGoogle Scholar
Komm, R., Ferguson, R., Hill, F., Barnes, G., & Leka, K. D. 2011, Sol. Phys., 268, 389CrossRefGoogle Scholar
Kontar, E. P., Hannah, I. G. & MacKinnon, A. L. 2008, A&A, 489, L57Google Scholar
Kopp, G. & Lean, J. L. 2011, GRL 380, L01706Google Scholar
Kramar, M., Jones, S., Davila, J., Inhester, B., & Mierla, M. 2009, Sol. Phys., 259, 109CrossRefGoogle Scholar
Kretzschmar, M. 2011, A&A, 530, A84Google Scholar
Krucker, S., Hudson, H. S., & Glesener, L. et al. , 2010, ApJ, 714, 1108CrossRefGoogle Scholar
Krucker, S., Hudson, H. S., & Jeffrey, N. L. S. et al. , 2011, ApJ, 739, 96CrossRefGoogle Scholar
Lee, J., Nita, G. M., & Gary, D. E. 2009, ApJ, 696, 274CrossRefGoogle Scholar
Kulinová, A., Kašparová, J., & Dzifčáková, E., et al. , 2011, A&A, 533, A81Google Scholar
Kumar, P., Srivastava, A. K., & Somov, B. V., et al. , 2010, ApJ, 723, 1651CrossRefGoogle Scholar
Li, B., Cairns, I. H., Yan, Y. H., & Robinson, P. A. 2011, ApJL, 738, L9CrossRefGoogle Scholar
Li, Y. & Fleishman, G. D. 2009, ApJL, 701, L52CrossRefGoogle Scholar
Liewer, P. C., de Jong, E. M., & Hall, J. R., et al. , 2009, Sol. Phys., 256, 57CrossRefGoogle Scholar
Linker, J. A., Lionello, R., Mikić, Z., Titov, V. S., & Antiochos, S. K. 2011, ApJ, 731, 110CrossRefGoogle Scholar
Liu, R., Liu, C., Wang, S., Deng, N., & Wang, H. 2010, ApJL, 725, L84CrossRefGoogle Scholar
Long, D. M., Gallagher, P. T., McAteer, R. T. J., & Bloomfield, D. S. 2011, A&A 531, A42Google Scholar
Longcope, D. W., Guidoni, S. E., & Linton, M. G. 2009, ApJ, 690, L18CrossRefGoogle Scholar
Lopes, I. & Passos, D. 2009, Sol. Phys. 257, 1CrossRefGoogle Scholar
Luoni, M. L., Démoulin, P., Mandrini, C. H. & van Driel-Gesztelyi, L. 2011, Sol. Phys., 270, 45CrossRefGoogle Scholar
Magara, T. & Tsuneta, S. 2008, PASJ, 60, 1181CrossRefGoogle Scholar
Martínez-Oliveros, J. C. & Donea, A.-C., 2009, MNRAS, 395, L39CrossRefGoogle Scholar
MartínezOliveros, J. C. Oliveros, J. C., Couvidat, S., & Schou, J., et al. , 2011, Sol. Phys., 269, 269CrossRefGoogle Scholar
Martínez-Sykora, J., De Pontieu, B., Hansteen, V. & McIntosh, S. W. 2011, ApJ, 732, 84CrossRefGoogle Scholar
Mann, G. & Warmuth, A. 2011, A&A, 528, A104Google Scholar
Masson, S., Pariat, E., Aulanier, G., & Schrijver, C. J. 2009, ApJ, 700, 559CrossRefGoogle Scholar
Matthews, S. A., Zharkov, S., & Zharkova, V. V. 2011, ApJ, 739, 71CrossRefGoogle Scholar
McIntosh, S. W. & De Pontieu, B. 2009, ApJ, 707, 524CrossRefGoogle Scholar
Mewaldt, R. A., Davis, A. J., & Lave, K. A. et al. , 2010, ApJ, 723, L1CrossRefGoogle Scholar
Milligan, R. O. 2011, ApJ, 740, 70CrossRefGoogle Scholar
Minoshima, T., Imada, S., & Morimoto, T., et al. , 2009, ApJ, 697, 843CrossRefGoogle Scholar
Moradi, H., Hanasoge, S. M., & Cally, P. S. 2009, ApJL, 690, L72CrossRefGoogle Scholar
Morgan, H. & Habbal, S. R. 2010, ApJ, 710, 1CrossRefGoogle Scholar
Murray, M. J., Baker, D., van Driel-Gesztelyi, L., & Sun, J. 2010, Sol. Phys., 261, 253CrossRefGoogle Scholar
Nandy, D., Munõz-Jaramillo, A., & Martens, P. C. H. 2011, Nature 471, 80CrossRefGoogle Scholar
Ning, Z., Cao, W., & Huang, J., et al. , 2009, ApJ, 699, 15CrossRefGoogle Scholar
Owens, M. J., Crooker, N. U., & Schwadron, N. A. et al. , 2008, GRL 352, L20108Google Scholar
Parchevsky, K. V. & Kosovichev, A. G. 2009, ApJ, 694, 573CrossRefGoogle Scholar
Park, S.-H., Lee, J., & Choe, G. S. et al. , 2008, ApJ, 686, 1397CrossRefGoogle Scholar
Penn, M. & Livingston, W. 2010, IAU Symp. 273; ArXiv 1009.0784Google Scholar
Pesnell, W. D. 2008, Sol. Phys. 252, 209CrossRefGoogle Scholar
Peter, H. 2010, A&A, 521, A51Google Scholar
Petrosian, V. & Chen, Q. 2010, ApJL, 712, L131CrossRefGoogle Scholar
Potts, H., Hudson, H., Fletcher, L., & Diver, D. 2010, ApJ, 722, 1514CrossRefGoogle Scholar
Reeves, K. K., Linker, J. A., Mikić, Z., & Forbes, T. G. 2010, ApJ, 721, 1547CrossRefGoogle Scholar
Reid, H. A. S., Vilmer, N., & Kontar, E. P. 2011, A&A, 529, A66Google Scholar
Reinard, A. A., Henthorn, J., Komm, R., & Hill, F. 2010, ApJ 710, L121CrossRefGoogle Scholar
Rempel, M. & Schlichenmaier, R. 2011, Living Rev. Sol. Phys., 8, 3CrossRefGoogle Scholar
Rempel, M., Schüssler, M., Cameron, R. H., & Knölker, M. 2009, Science, 325, 171CrossRefGoogle Scholar
Saint-Hilaire, P., Krucker, S., & Lin, R. P. 2009, ApJ, 699, 245CrossRefGoogle Scholar
Sawant, H. S., Cecatto, J. R., & Mészárosová, H., et al. , 2009, Adv. Space Res. 44, 54CrossRefGoogle Scholar
Schrijver, C. J. & Title, A. M. 2011, JGR 116, 4108CrossRefGoogle Scholar
Solomon, S. C., Woods, T. N., Didkovsky, L. V., Emmert, J. T., & Qian, L. 2010, GRL 371, L16103Google Scholar
Svalgaard, L. & Hudson, H. S. 2010, in ASP Conf. Ser. 428, SOHO-23: Understanding a Peculiar Solar Minimum, Cranmer, S.R., Hoeksema, J.T., & Kohl, J.L. (eds.), 325Google Scholar
Svalgaard, L., Hannah, I. G., & Hudson, H. S. 2011, ApJ, 733, 49CrossRefGoogle Scholar
Thompson, W. T. 2011, JASTP, 73, 1138Google Scholar
Tian, H., McIntosh, S. W. & De Pontieu, B., et al. , 2011, ApJ, 738, 18CrossRefGoogle Scholar
Titov, V. S., Mikić, Z., Linker, J. A., Lionello, R., & Antiochos, S. K. 2011, ApJ, 731, 111CrossRefGoogle Scholar
Török, T., Panasenco, O., & Titov, V. S., et al. , 2011, ApJL, 739, L63CrossRefGoogle Scholar
Vásquez, A. M., Frazin, R. A., & Kamalabadi, F. 2009, Sol. Phys., 256, 73CrossRefGoogle Scholar
Vásquez, A. M., Huang, Z., Manchester, W. B. IV, & Frazin, R. A. 2011, Sol. Phys., in press, DOI: 10.1007/s11207-010-9706-1Google Scholar
Veronig, A. M., Muhr, N., Kienreich, I. W., Temmer, M., & Vršnak, B. 2010, ApJL 716, L57CrossRefGoogle Scholar
Wang, H. & Liu, C. 2010, ApJ, 716, L195CrossRefGoogle Scholar
Wang, X., Ge, H., Gary, D. E., & Nita, G. M. 2009, PASP, 121, 1139CrossRefGoogle Scholar
Wang, Y.-M., Robbrecht, E. & SheeleyJr., N. R. Jr., N. R. 2009, ApJ 707, 1372CrossRefGoogle Scholar
Warmuth, A. 2010, Adv. Space Res. 45, 527CrossRefGoogle Scholar
Warmuth, A. & Mann, G. 2011, A&A 532, A151Google Scholar
Warmuth, A., Mann, G., & Aurass, H. 2009, A&A, 494, 677Google Scholar
Watanabe, K., Krucker, S., & Hudson, H. et al. , 2010a, ApJ, 715, 651CrossRefGoogle Scholar
Watanabe, T., Hara, H., Sterling, A. C., & Harra, L. K. 2010b, ApJ, 719, 213CrossRefGoogle Scholar
Williams, D. R., Harra, L. K., Brooks, D. H., Imada, S., & Hansteen, V. H. 2009, PASJ, 61, 493CrossRefGoogle Scholar
Wills-Davey, M. J. & Attrill, G. D. R. 2009, Space Sci. Rev. 149, 325CrossRefGoogle Scholar
Wu, S. T., Wang, A. H., & Gary, G. A., et al. , 2009, Adv. Space Res., 44, 46CrossRefGoogle Scholar
Yan, Y., Zhang, J., & Wang, W., et al. , 2009, Earth Moon and Planets, 104, 97CrossRefGoogle Scholar
Yeates, A. R., Attrill, G. D. R., & Nandy, D., et al. , 2010a, ApJ, 709, 1238CrossRefGoogle Scholar
Yeates, A. R., Mackay, D. H., van Ballegooijen, A. A., & Constable, J. A. 2010b, JGR, 115, 9112CrossRefGoogle Scholar
Zacharias, P., Peter, H., & Bingert, S. 2011, A&A, 531, A97Google Scholar
Zharkova, V. V. & Siversky, T. V. 2011, ApJ, 733, 33CrossRefGoogle Scholar
Zhukov, A. N. 2011, JASTP, 73, 1096Google Scholar
Zlotnik, E. Y., Zaitsev, V. V., Aurass, H., & Mann, G. 2009, Sol. Phys., 255, 273CrossRefGoogle Scholar