Abstract
From a sample of 7 MSFC vector magnetograms of active regions and 17 Yohkoh SXT soft X-ray images of these active regions, we have found that the total X-ray brightness of an entire active region is correlated with the total length of neutral lines on which the magnetic field is both strong (>250 G) and strongly sheared (shear angle >75°) in the same active region. This correlation, if not fortuitous, is additional evidence of the importance of strong-shear strong-field neutral lines to strong heating in active regions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Cook, J. W., Cheng, C.-C., Jacobs, V. L., and Antiochos, S. K.: 1989, Astrophys. J. 338, 1176.
Falconer, D. A., Moore, R. L., Porter, J. G., Gary, G. A., and Shimizu, T.: 1997, Astrophys. J. 482, 519.
Fisher, G. H., Longcope, D. W., Metcalf, T. R., and Pevtsov, A. A.: EOS 77, (46) F559.
Tsuneta, S., Acton, L., Brunner, M., Lemen, J., Brown, W., Caravalho, R., Catura, R. Freeland, S., Jurceivich, B., Morrison, M., Ogawara, Y., Hirayama, T., and Owens, J.: 1991, Solar Phys., 13637.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Falconer, D.A. A Correlation between Length of Strong-Shear Neutral Lines and Total X-ray Brightness in Active Regions. Solar Physics 176, 123–126 (1997). https://doi.org/10.1023/A:1004989113714
Issue Date:
DOI: https://doi.org/10.1023/A:1004989113714