Abstract
Analysis of SOHO longitudinal magnetograms and Dopplergrams has revealed the appearance of a region of enhanced upflow of matter in the photosphere when the top of a loop-shaped magnetic flux tube forming a large active region passed through it. The maximum upflow velocity reached 2 km s−1, the maximum size exceeded 20 000 km, and the lifetime was about 2 h.
Similar content being viewed by others
References
M. R. V. Bappu, M. V. Grigorjev, and V. E. Stepanov, Sol. Phys. 4, 409 (1968).
V. Bumba, Rend. Sc. Int. Fis. “Enrico Fermi” 39, 77 (1967).
A. V. Getling, Astron. Zh. 78, 661 (2001) [Astron. Rep. 45, 569 (2001)].
B. W. Lites, A. Skumanich, and V. Martinez Pillet, Astron. Astrophys. 333, 1053 (1998).
H. W. Newton, Face of the Sun (Penguin Books, London, 1958).
E. N. Parker, Astrophys. J. 121, 491 (1955).
B. A. Tverskoi, Geomagn. Aéron. 6, 11 (1966).
C. Zwaan, Sol. Phys. 100, 397 (1985).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.M. Grigor’ev, L.V. Ermakova, A.I. Khlystova, 2007, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2007, Vol. 33, No. 11, pp. 858–862.
Rights and permissions
About this article
Cite this article
Grigor’ev, V.M., Ermakova, L.V. & Khlystova, A.I. Dynamics of line-of-sight velocities and magnetic field in the solar photosphere during the formation of the large active region NOAA 10488. Astron. Lett. 33, 766–770 (2007). https://doi.org/10.1134/S1063773707110072
Received:
Issue Date:
DOI: https://doi.org/10.1134/S1063773707110072