Abstract
By comparing TRACE 171 Å observations with photospheric magnetograms, we find that the root of TRACE 171 Å emission is centered in magnetic elements in simultaneous Huairou photospheric magnetogram and the luminosity of TRACE 171 Å emission is not always in proportion to the strength of the corresponding photospheric magnetic field. While TRACE emission from an active region shows an obvious upward extension as a whole, fibril-like emissions from network elements show little extension along the structure from the root of each emission to 40′′ higher up in the solar atmosphere. Together with previous studies by Zhang and Zhang (1999, 2000), it is suggested that the magnetic fields in active regions and quiet-Sun regions present different spatial structures from the solar photosphere to the chromosphere and maybe even in the corona.
Similar content being viewed by others
References
Ai, G. and Hu, Y.: 1986, Acta Astron. Sinica 27, 173.
Ai, G., Li, W., and Zhang, H.: 1982, Chinese Astron. Astrophys. 6, 129.
Almeida, J. S.: 1997, Astron. Astrophys. 324, 763.
Cuperman, S., Bruma, C., and Heristchi, D.: 1997, Astron. Astrophys. Suppl. Ser. 122, 381.
Démoulin, P., Bagala, L. G., Mandrini, C. H., Hénoux, J. C., and Rovira, M. G.: 1997, Astron. Astrophys. 325, 305.
Handy, B. et al.: 1999, Solar Phys. 187, 229.
Li, W., Ai, G. X., and Zhang, H. Q., 1994, Solar Phys. 151, 1.
Liu, Y., Srivastava, N., Prasad, D., Li, W., and Ai, G. X., 1995, Solar Phys. 158, 249.
Neupert, W. M., Newmark, J., Delaboudinière, J. P., et al.: 1998, Solar Phys. 183, 305.
Wang, H. N.: 1997, Solar Phys. 174, 265.
Wang, T. J., Wang, H. N., and Qiu, J.: 1999, Astron. Astrophys. 342, 854.
Worden, J., Woods, T. N., Neupert, W. M., and Delaboudinière, J. P.: 1999, Astrophys. J. 511, 965.
Yan, Y. and Wang, J.: 1995, Astron. Astrophys. 298, 277.
Zhang, M. and Zhang, H. Q.: 1999, Astron. Astrophys. 352, 317.
Zhang, M. and Zhang, H. Q.: 2000, Solar Phys. 194, to appear.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Zhang, M., Zhang, H., Ai, G. et al. Different spatial structures between network regions and active regions indicated by TRACE 171 Å observation. Sol Phys 190, 79–90 (1999). https://doi.org/10.1023/A:1005276217089
Issue Date:
DOI: https://doi.org/10.1023/A:1005276217089