Helicity of the photospheric magnetic field

Geophysical Monograph Series

Volumn 111, Issue , 1999, Pages 103-110

  Pevtsov, Alexei A ^a   Canfield, Richard C ^a  

^a MONTANA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 85040100759     PISSN: 00658448     EISSN: 23288779     Source Type: Book Series    
DOI: 10.1029/GM111p0103     Document Type: Chapter

References (50)

1. Abramenko, V. I., Wang, T. and Yurchishin, V. B., Electric current helicity in 40 active regions in the maximum of solar cycle 22 Solar Phys., 174, 291-296, 1997.
2. Babcock, H., The topology of the Sun’s magnetic field and the 22-year cycle, Astrophys. J., 304, 542-559, 1961.
3. Bao, S. and Zhang, H., Patterns of current helicity for the twenty-second solar cycle, Astrophys. J., 496, L43-L46, 1998.
4. Beck, J. G., Duvall, T. L., Scherrer, P. H., and Hoeksema, J. T., The detection of giant velocity cells on the Sun (abstract), Eos Trans. AGU, 75(17), Spring Meet. Suppl., S281, 1998.
5. Brummell, N. H., Hurlburt, N. E., and Toomre, J., Turbu-lent compressible convection with rotation. I. Flow struc-ture and evolution, Astrophys. J., 473, 494-513, 1996.
6. Canfield, R. C. and Pevtsov, A.A., Helicity of solar active-region magnetic fields, in Synoptic Solar Physics, A.S.P Conf. Ser., edited by K.S. Balasubramaniam, J.W. Har-vey and M. Rabin, 140, pp. 131-143, A.S.P., 1998.
7. Canfield, R. C. and Pevtsov, A. A., Helicity and re-connection in the solar corona: observations, in Mag-netic Helicity in Space and Laboratory Plasmas edited by M.R. Brown, R.C. Canfield and A.A. Pevtsov, Geophys. Monogr. Ser., AGU, Washington, D.C., this volume, 1999.
8. D’Silva, S. and Howard, R. F., Sunspot rotation and the field strengths of subsurface flux tubes, Solar Phys” 151, 213-230, 1994.
9. Field, G., Magnetic helicity in astrophysics, in Magneto-spheric phenomena in astrophysics, pp. 324-341, Ameri-can Institute of Physics, New York, 1986.
10. Fisher, G. H., Fan, Y., and Howard, R. F., Comparisons be-tween theory and observations of active region tilts, As-trophys. J., 438, 463-471, 1995.
11. Foukal, P., Chirality, helicity, and Joy’s law, in New Perspectives on *So/ar Prominences, Proceedings of a meeting held in Aussois, France (IAU Colloquium 167) 28 April-4 May 1997, pp. 446, 1998.
12. Gaizauskas, V., Harvey, K. L., Harvey, J.W., and Zwaan, C.J. Large-scale patterns formed by solar active regions during the ascending phase of cycle 21, Astrophys. J., 265, 1056-1065, 1983.
13. Gary, G. A., Moore, R. L., Hagyard, M. J., and Haisch, B.M., Nonpotential features observed in the magnetic field of an active region, Astrophys. J. 314, 782-794, 1987.
14. Grigoryev, V. M. and Latushko, S. M., E-W motions of large-scale magnetic field structures of the Sun, Solar Phys., 140, 239-245, 1992.
15. Hagyard, M. J., Cumings, N. P., and West, E. A., The MSFC vector magnetograph, in Proceedings of Kunming Workshop on Solar Physics and Interplanetary Traveling Phenomena, edited by C. De Jager and Chen Biao, pp. 204-204, Science Press, Beijing, China, 1985.
16. Hagyard, M. J., Pevtsov, A. A., and Canfield, R. C., Studies of solar magnetic helicity with the MSFC vector magne-tograph, Solar Phys in preparation, 1999.
17. Hale, G. E., The fields of force in the atmosphere of the Sun, Nature, 119(3002), 708-714, 1927.
18. Hathaway, D. H., Bogart, R. S., and Beck, J. G., A search for giant cells on the Sun (abstract), Eos Trans. AGU, 79(17), Spring Meet. Suppl., S281, 1998.
19. Latushko, S. M. and Pevtsov, A. A., in preparation, Astro-phys. 7., 1998.
20. Leka, K. D., Canfield, R. C., McClymont, A. N., and Van Driel-Gesztelyi, L., Evidence for current-carrying emerg-ing flux, Astrophys. J., 462, 547-560, 1996.
21. Lites, B. W., Elmore, D. F., Seagraves, P., and Skumanich, A. P., Stokes profile analysis and vector magnetic fields. VI. Fine scale structure of a sunspot, Astrophijs. J., 418, 928-942, 1993.
22. Longcope, D. W. and Fisher, G. H., The effect of convection zone turbulence on a rising flux tube, Astrophys. J., 458, 380-390, 1996.
23. Longcope, D. W., Fisher, G. H., and Pevtsov, A. A., Flux tube twist resulting from helical turbulence: the Σ-effect, Astrophys. J., 507, 417-432, 1998.
24. Longcope, D., Linton, M., Pevtsov, A., Fisher, G., and Klap-per, I., Twisted flux tubes and how they get that way, in Magnetic Helicity in Space and Laboratory Plasmas, edited by M.R. Brown, R.C. Canfield and A.A. Pevtsov, Geophys. Monogr. Ser., AGU, Washington, D.C., this vol-ume, 1999.
25. Martin, S. F., Bilimoria, R., and Tracadas, P. W., Magnetic field configurations basic to filament channels and filaments, in Rutten, C. J. and Schrjiver, C. J. (Eds.), Solar Surface Magnetism, pp. 303-338, Kluwer Academic Publishers, Dordrecht, 1994.
26. Martinez, P. V., Lites, B. W., and Skumanich, A. P., Active region magnetic fields. I. Plage fields Astrophys. J., 474, 810-842, 1997.
27. Mickey, D.L., The Haleakala stokes polarimeter, Solar Phys., 97, 223-238, 1985.
28. Moffatt, H. K. and Ricca, R. L., Helicity and the Călugăreanu invariant, Proc. R. Soc. Lond. A, 439, 411-429, 1992.
29. Pevtsov, A. A., Canfield, R.C., and McClymont, A. N., On the subphotospheric origin of coronal electric currents, Astrophys. J., 481, 973-977, 1997.
30. Pevtsov, A. A., Canfield, R. C., and Metcalf, T. R., Patterns of helicity in solar active regions, Astrophys. J., 425, L117-L119, 1994.
31. Pevtsov, A. A., Canfield, R. C., and Metcalf, T. R., Latitu-dinal variation of helicity of photospheric magnetic fields, Astrophys. J., 440 L109-L112, 1995.
32. Pevtsov, A. A. and Latushko, S. M., Helicity of large scale photospheric magnetic fields (abstract), Bull. Amer. Astron. Soc 27(2), 978, 1995.
33. Pevtsov, A. A. and Peregud, N. L., Electric currents in a unipolar sunspot, in Physics of Magnetic Flux Ropes, edited by C.T. Rassel, E.R. Priest and L.C. Lee, Geophys. Monogr. Ser., 58, pp. 161-165, AGU, Washington, D.C., 1990.
34. Priest, E. R., Solar magnetohydrodynamics, Reidel, Dor-drecht. 1984.
35. Richardson, R. S., The nature of solar hydrogen vortices, Astrophys. 493 24-28, 1941.
36. Rust, D. M., Magnetic helicity in solar filaments and coronal mass ejections, in Magnetic Helicity m Space and Labora-tory Plasmas, edited by M.R. Brown, R.C. Canfield and A.A. Pevtsov, Geophys. Monogr. Ser., AGU, Washington, D.C., this volume, 1999.
37. Rust, D. M. and Kumar, A., Helical magnetic fields in fila-ments, Solar Phys., 155, 69-97, 1994.
38. Rust, D. M. and Kumar, A., Evidence for helically kinked magnetic flux ropes in solar eruptions, Astrophys. J., 464, L199-L202, 1996.
39. Sandborgh, S. C., Canfield, R. C., and Pevtsov, A. A., Chi-rality of large-scale flux systems in the solar corona (abstract), Eos Trans. AGU, 79(17), Spring Meet. Suppl., S285, 1998.
40. Seehafer, N., Electric current helicity in the solar atmo-sphere, Solar Phys 125, 219-232, 1990.
41. Semel, M., Mouradian, Z., Soru-Escaut, M., Maltby, P., Rees, D., Makita, M., and Sakurai, T., Active regions, sunspots and their magnetic fields, in Solar Interior and Atmosphere, edited by A. Cox, W. Livingston, and M. Matthews, pp. 844-889, The University of Arizona Press, Tucson, 1991.
42. Skumanich, A. and Lites, B. W., Stokes profile analysis and vector magnetic fields. I-Inversion of photospheric lines, Astrophys. J., 322, 473-482, 1987.
43. Smith, C. W., Solar-cycle, radial and latitudinal varia-tions of magnetic helicity: IMF observations, in Magnetic Helicity in Space and Laboratory Plasmas, edited by M.R. Brown, R.C. Canfield and A.A. Pevtsov, Geophys. Monogr. Ser., AGU, Washington, D.C., this volume, 1999.
44. Stenflo, J.O., Solar Magnetic Fields, Polarized Radiation Diagnostics, Kluwer Academic Publishers, Dordrecht, 1994.
45. Van Ballegooijen, A. A., Cartledge, N. P., and Priest, E. R., Magnetic flux transport and the formation of filament channels on the Sun, Astrophys. J 501, 866-881, 1998.
46. Van Driel-Gesztelyi, L., Csepura, G., Schmieder, B., Malherbe, J. M., and Metcalf, T., Evolution of a delta group in the photosphere and corona, Solar Phys., 172, 151-160, 1997.
47. West, E. A. and Hagyard, M. J., Interpretation of vector magnetograph data including magneto-optic effects. I-Azimuth angle of the transverse field, Solar Phys., 88, 51-64, 1983.
48. Zhang, H. and Bao, S., private communication, 1998.
49. Zirin, H., Astrophysics of the Sun, Cambridge Univ. Press, Cambridge, 1988.
50. Zirker, J.B., Martin, S. F., Harvey, K. H., and Gaizauskas, V., Global magnetic patterns of chirality, Solar Phys., 175, 45-58, 1997.