The velocity distribution of solar photospheric magnetic bright points

Keys, PH, Mathioudakis, M, Jess, DB, Shelyag, Sergiy, Crockett, PJ, Christian, DJ and Keenan, FP 2011, The velocity distribution of solar photospheric magnetic bright points, Astrophysical journal letters, vol. 740, no. 2, pp. 1-5, doi: 10.1088/2041-8205/740/2/L40.

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Title The velocity distribution of solar photospheric magnetic bright points
Author(s) Keys, PH
Mathioudakis, M
Jess, DB
Shelyag, SergiyORCID iD for Shelyag, Sergiy
Crockett, PJ
Christian, DJ
Keenan, FP
Journal name Astrophysical journal letters
Volume number 740
Issue number 2
Article ID L40
Start page 1
End page 5
Total pages 5
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2011-10-20
ISSN 2041-8205
Keyword(s) sun: activity
sun: evolution
sun: photosphere
science & technology
physical sciences
astronomy & astrophysics
Summary We use high spatial resolution observations and numerical simulations to study the velocity distribution of solar photospheric magnetic bright points. The observations were obtained with the Rapid Oscillations in the Solar Atmosphere instrument at the Dunn Solar Telescope, while the numerical simulations were undertaken with the MURaM code for average magnetic fields of 200G and 400G. We implemented an automated bright point detection and tracking algorithm on the data set and studied the subsequent velocity characteristics of over 6000 structures, finding an average velocity of approximately 1kms-1, with maximum values of 7kms-1. Furthermore, merging magnetic bright points were found to have considerably higher velocities, and significantly longer lifetimes, than isolated structures. By implementing a new and novel technique, we were able to estimate the background magnetic flux of our observational data, which is consistent with a field strength of 400G.
Language eng
DOI 10.1088/2041-8205/740/2/L40
Field of Research 0201 Astronomical And Space Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2011, The American Astronomical Society
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