Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 740, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/740/2/L40
Keywords
Sun: activity; Sun: evolution; Sun: photosphere
Categories
Funding
- UK Science and Technology Facilities Council (STFC)
- National Science Foundation
- Northern Ireland Department for Employment and Learning
- STFC
- Air Force Office of Scientific Research, Air Force Material Command, USAF [FA8655-09-13085]
- STFC [ST/H000852/1, ST/G004986/1, ST/I00016X/1, ST/I001123/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/I001123/1, ST/I00016X/1, ST/H000852/1, ST/G004986/1] Funding Source: researchfish
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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 200 G and 400 G. 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 1 km s(-1), with maximum values of 7 km s(-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 400 G.
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