Abstract
We have studied the rotation of the solar corona using the images taken at a 9.4 nm wavelength by the AIA 094 instrument on board the Solar Dynamics Observatory (SDO) satellite. Our analysis implies that the solar corona rotates differentially. It appears that ω, the angular rotation velocity of the solar corona, does not only depend on heliographic latitude but is also a function of time, while the nature of the latter dependence remains unclear. Besides measurement errors, deviations Δω from the mean rotational speed are also caused by proper motion of the observed point source (the tracer) with respect to its surroundings. The spread in ω values at a particular heliographic latitude is a real effect, not caused by measurement errors. Most of the observations carry relative error less than 1 % in ω.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., Hochedez, J.-F.: 2001, Astron. Astrophys. 374, 309.
Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., Hochedez, J.-F.: 2002, Astron. Astrophys. 392, 329.
Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., Hochedez, J.-F., Roša, D.: 2004, Astron. Astrophys. 414, 707.
Hara, H.: 2009, Astrophys. J. 697, 980.
Howard, R., Harvey, J.: 1970, Solar Phys. 12, 23.
Howard, R., Gilman, P.A., Gilman, P.I.: 1984, Astrophys. J. 283, 373.
Karachik, N., Pevtsov, A.A., Sattarov, I.: 2006, Astrophys. J. 642, 562.
Kariyappa, R.: 2008, Astron. Astrophys. 488, 297.
Kwon, R.-Y., Chae, J., Zhang, J.: 2010, Astrophys. J. 714, 130.
Mancuso, S., Giordano, S.: 2012, Astron. Astrophys. 539, A26. doi: 10.1051/0004-6361/201117869 .
Rybák, J., Rušin, V., Rybanský, M.: 1994, In: Rušin, V., Heinzel, P., Vial, J.-C. (eds.) Solar Coronal Structures, IAU Colloq. 144, VEDA Publishing House of the Slovak Academy of Sciences, 139.
Stepanov, V.E., Tjagun, N.F.: 1971, In: Howard, R. (ed.) Solar Magnetic Fields, IAU Symp. 43, 667.
Snodgrass, H.B., Ulrich, R.K.: 1990, Astrophys. J. 351, 309.
Sýkora, J.: 1971, Solar Phys. 18, 72.
Ulrich, R.K., Boyden, J.E.: 2005, Astrophys. J. Lett. 620, L123.
Wöhl, H., Brajša, R., Hanslmaier, A., Gissot, S.F.: 2010, Astron. Astrophys. 520, 1.
Acknowledgements
The authors wish to express their gratitude to the referee whose comments have helped to improve the presented work. We would like to thank the SDO (NASA) and AIA science team for the provided observational material. This contribution was partially supported by the VEGA Agency grant 0081/2010. The authors would also like to thank their assistant Mrs. Eleonóra Hodálová who carried out a substantial part of the precise measurements.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lorenc, M., Rybanský, M. & Dorotovič, I. On Rotation of the Solar Corona. Sol Phys 281, 611–619 (2012). https://doi.org/10.1007/s11207-012-0105-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11207-012-0105-7