Abstract
Near simultaneous coronal EUV images were used to show that the He ii λ304 network brightening is independent of coronal EUV radiation. We studied the quantitative relation between the intensity of He ii λ304 network brightening with the associated magnetic elements. An almost linear relationship was found between the He ii λ304 network brightening and the magnetic field for a field strength higher than 10 G with exceptions at neutral lines and in the intra-network. We also calculated the most probable formation height of He ii λ304 network elements using the potential extrapolation of the photospheric magnetic field. The results show that He ii λ304 network elements form at or around 3000 km above the height of the layer at which the sources of magnetic flux are deployed.
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References
Alissandrakis, C. E.: 1981, Astron. Astrophys. 100, 197.
Andretta, V. and Jones, H. P.: 1997, Astrophys. J. 489, 375.
Andretta, V., Jordan, S. D., Brosius, J. W., Davila, J. M., Thomas, R. J., Behring, W. E., Thompson, W. T., and Garcia, A.: 2000, Astrophys. J. 535, 438.
Athay, R. G.: 1988, Astrophys. J. 329, 482.
Avrett, H. E., Vernazza, J. E., and Linsky, J. L.: 1976, Astrophys. J. 207, L199.
Delaboudinière, J.-P. et al.: 1995, Solar Phys. 162, 291.
Feldman, U., Dammasch, I. E., and Wilhelm, K.: 2000, Space Sci. Rev. 93, 411.
Feldman, U., Winding, K. G., and Warren, H. P.: 1999, Astrophys. J. 522, 1133.
Freeland, S. L. and Handy, B. N.: 1998, Solar Phys. 182, 497.
Gabriel, A. H.: 1976, Phil. Trans. R. Soc. London 281, 339.
Gary, A.: 1989, Astrophys. Suppl. Ser. 69, 323.
Goldberg, L.: 1939, Astrophys. J. 89, 673.
Harvey, J. W. and Sheeley, N. R.: 1977, Solar Phys. 54, 343.
Hearn, A. G.: 1969a, Monthly Notices Royal Astron. Soc. 142, 259.
Hearn, A. G.: 1969b, Monthly Notices Royal Astron. Soc. 144, 351.
Hirayama, T.: 1971, Solar Phys. 17, 50.
Jones, H. P., Duvall, T. L. Jr., Harvey, J. W., Mahaffey, C. T., Schwitters, J. D., and Simmons, J. E.: 1992, Solar Phys. 139, 211.
Jordan, C.: 1975, Monthly Notices Royal Astron. Soc. 170, 429.
Jordan, S. D., Thompson, W. T., Thomas, R. J., and Neupert, W. M.: 1993, Astrophys. J. 406, 346.
Kohl, J. L.: 1977, Astrophys. J. 211, 958.
Macpherson, K. P. and Jordan, C.: 1999, Monthly Notices Royal Astron. Soc. 308, 510.
Nakagawa, Y. and Raadu, M. A.: 1972, Solar Phys. 25, 127.
Patsourakos, S., Vial, J. C., Gabriel, A. H., and Bellamine, N.: 1999, Astrophys. J. 522, 540.
Scherrer, P. H. et al.: 1995, Solar Phys. 162, 129.
Shine, R., Gerola, H., and Linsky, J. L.: 1975, Astrophys. J. 202, L101.
Simon, G. W. and Leighton, R. B.: 1964, Astrophys. J. 140, 1120.
Sridharan, R.: 2001, 'Techniques for Achieving Higher Spatial Resolution', Ph.D. Thesis, Bangalore University, Bangalore, India, submitted.
Thompson, W. T., Neupert, W.M., Jordan, S., Jones, H., Thomas, R., and Schmieder, B.: 1993, Solar Phys. 147, 29.
Tousey, R. J.-D., Bartoe, J.-D., Bohlin, J. D., Brueckner, G. E., Purcell, J. D., Scherrer, V. E., Sheeley, N. R. Jr., Schumacher, R. J., and Vanhooser, M. E.: 1973, Solar Phys. 33, 265.
Venkatakrishnan, P.: 1999, Solar Phys. 187, 23.
Wang, Y.-M. et al.: 1997, Astrophys. J. 484, L75.
Zirin, H.: 1975, Astrophys. J. 199, L63.
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Ravindra, B., Venkatakrishnan, P. On the Correlation Between the he ii λ304 Network Brightening and the Photospheric Magnetic Field. Solar Physics 214, 267–285 (2003). https://doi.org/10.1023/A:1024247822845
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DOI: https://doi.org/10.1023/A:1024247822845