Solar Physics

, 294:25 | Cite as

Transient Dimming of the Bright Fe xiv Emission Region in the Solar Corona of the 21 August 2017 Total Solar Eclipse

  • D. H. LiebenbergEmail author


During the 21 August 2017 total solar eclipse the corona was observed through a narrowband filter centered at the Fe xiv green emission line at a cadence of 30 frames/s. A bright region on the east limb was observed to dim during the 2 m 35 s totality. Details of the temporal behavior of this region are reported. The likely association of the dimming with a coronal mass ejection (CME) in progress during the eclipse or the small sunspot group with coronal loops near the east limb is discussed.


Solar eclipse Corona Fe xiv emission line Temporal variation 



The author appreciates the second measurement of the filter pass band by the group of A. Rao, the physics shop construction and fitting of the filter to the camera, and the Mirametrics Company for the Mira 7 software. The communication by S. Habbal is especially appreciated, as is the help in finding NASA AIA/SDO images by Joseph Gurman, US Project Scientist for SOHO SDAC Facility Scientist, NASA, and for encouragement from an anonymous referee. This paper uses data from the CACTus CME catalog, generated and maintained by the SIDC at the Royal Observatory of Belgium.

Disclosure of Potential Conflicts of Interest

The author declares to have no conflicts of interest.


  1. Aschwanden, M.: 2004, Physics of the Solar Corona: An Introduction, Springer, New York, Chap. 8. Google Scholar
  2. Billings, D.: 1966, The Solar Corona, Academic Press, San Diego. Google Scholar
  3. Brittain, S.: 2017, In: Melvin, J. (ed.) Eclipse over Clemson, Clemson University Press, Clemson, 67. Google Scholar
  4. Cheng, X., Zhang, J., Saar, S.H., Ding, M.D.: 2012, Astrophys. J. 761, 62. DOI. ADSCrossRefGoogle Scholar
  5. Goryaev, F.F., Slemzin, V.A., Rodkin, D.G., D’Huys, E., Podladchikova, O., West, M.J.: 2018, Astrophys. J. Lett. 856, L38. DOI. ADSCrossRefGoogle Scholar
  6. Habbal, S.: 2018, Private communication. Institute for Astronomy, University of Hawaii, Manoa, Honolulu, HI 96822. Google Scholar
  7. Joshi, B., Ibrahim, M.S., Shanmugaraju, A., Chakrabarty, D.: 2018, Solar Phys. 293, 107. DOI. ADSCrossRefGoogle Scholar
  8. Kahler, S.W., Sheeley, N.R. Jr., Howard, R.A., Koomen, M.J., Michels, D.J., McGuire, R.E., von Rosenvinge, T.T., Reames, D.V.: 1974, J. Geophys. Res. 89, 9683. DOI. ADSCrossRefGoogle Scholar
  9. Liebenberg, D.H., Hoffman, M.M.: 1975, In: Coronal Disturbances. Newkirk, G. (ed.): IAU Symp. 57. Reidel, Dordrecht, 485. Google Scholar
  10. Liebenberg, D., Bessey, R., Watson, B.: 1975, Solar Phys. 50, 109. DOI. ADSCrossRefGoogle Scholar
  11. Mason, J.P., Woods, T.N., Caspi, A., Thompson, B.J., Hock, R.A.: 2014, Astrophys. J. 789, 61. DOI. ADSCrossRefGoogle Scholar
  12. McIntosh, S.W.: 2009, Astrophys. J. 693, 1306. DOI. ADSCrossRefGoogle Scholar
  13. NASA/SDO photos of the 2017-Aug-21 total solar eclipse can be accessed at

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Physics and AstronomyClemson UniversityClemsonUSA

Personalised recommendations