Observations of Ellerman bombs in Hα

Zachariadis, Th.; Alissandrakis, C. E.; Banos, G.

doi:10.1007/BFb0022429

Observations of Ellerman bombs in Hα

Th. Zachariadis¹,
C. E. Alissandrakis² &
G. Banos³

Session 4. The Surface fine structure as a Probe of the Solar Interior
Conference paper
First Online: 01 January 2005

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Part of the book series: Lecture Notes in Physics ((LNP,volume 233))

Abstract

A developing active region near the center of the solar disk was observed for 80min at the center and the wings of Hα. Ellerman bombs lying below an arch filament system (AFS) and near sunspots were studied at H -1Å and H -0.75Å. We found that 50% of the bombs appear and desappear in pairs, the axis of each pair forming a small angle with the magnetic field lines of force as evidenced by the AFS, in addition the members of each pair show proper motions with an average relative velocity of 600m/sec. This behaviour suggests their association with bipolar emerging magnetic flux tubes. The average contrast (1.29), lifetime (19 minutes), size (0″.96 x 0″.58) and flux of some 70 bombs was also determined. We find evidence of an increase of the size with height and a fluctuation of the flux with time.

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Authors and Affiliations

Research Center for Astronomy and Applied Mathematics, Academy of Athens, 14 Anagnostopoulou Str., 10673, Athens, Greece
Th. Zachariadis
Section of Astrophysics, Astronomy and Mechanics, University of Athens, 15771, Athens, Greece
C. E. Alissandrakis
Division of Astro-Geophysics, Department of Physics, University of Ioannina, Ioannina, Greece
G. Banos

Authors

Th. Zachariadis
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C. E. Alissandrakis
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G. Banos
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Richard Muller

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Zachariadis, T., Alissandrakis, C.E., Banos, G. (1985). Observations of Ellerman bombs in Hα. In: Muller, R. (eds) High Resolution in Solar Physics. Lecture Notes in Physics, vol 233. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0022429

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DOI: https://doi.org/10.1007/BFb0022429
Published: 10 June 2005
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-15678-9
Online ISBN: 978-3-540-39608-6
eBook Packages: Springer Book Archive

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