Automated detection and tracking of solar magnetic bright points

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20 Citations (Scopus)

Abstract

Magnetic bright points (MBPs) in the internetwork are among the smallest objects in the solar photosphere and appear bright against the ambient environment. An algorithm is presented that can be used for the automated detection of the MBPs in the spatial and temporal domains. The algorithm works by mapping the lanes through intensity thresholding. A compass search, combined with a study of the intensity gradient across the detected objects, allows the disentanglement of MBPs from bright pixels within the granules. Object growing is implemented to account for any pixels that might have been removed when mapping the lanes. The images are stabilized by locating long-lived objects that may have been missed due to variable light levels and seeing quality. Tests of the algorithm, employing data taken with the Swedish Solar Telescope, reveal that approximate to 90 per cent of MBPs within a 75 x 75 arcsec(2) field of view are detected.
Original languageEnglish
Pages (from-to)1852-1861
JournalMonthly Notices of the Royal Astronomical Society
Volume397
DOIs
Publication statusPublished - 21 Aug 2009

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

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