The size distribution of magnetic bright points derived from Hinode/SOT observations

Details The size distribution of magnetic bright points derived from Hinode/SOT observations The size distribution of magnetic bright points derived from Hinode/SOT observations

2009-12-14

arxiv.org/abs/0912.2637v1

2009A&A...498..289U

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Astronomy and Astrophysics, Volume 498, Issue 1, 2009, pp.289-293

Scientific paper

10.1051/0004-6361/200810867

Context. Magnetic Bright Points (MBPs) are small-scale magnetic features in the solar photosphere. They may be a possible source of coronal heating by rapid footpoint motions that cause magnetohydrodynamical waves. The number and size distribution are of vital importance in estimating the small scale-magnetic-field energy. Aims. The size distribution of MBPs is derived for G-band images acquired by the Hinode/SOT instrument. Methods. For identification purposes, a new automated segmentation and identification algorithm was developed. Results. For a sampling of 0.108 arcsec/pixel, we derived a mean diameter of (218 +- 48) km for the MBPs. For the full resolved data set with a sampling of 0.054 arcsec/pixel, the size distribution shifted to a mean diameter of (166 +- 31) km. The determined diameters are consistent with earlier published values. The shift is most probably due to the different spatial sampling. Conclusions. We conclude that the smallest magnetic elements in the solar photosphere cannot yet be resolved by G-band observations. The influence of discretisation effects (sampling) has also not yet been investigated sufficiently.

Affiliated with

Also associated with

No associations

Rating

The size distribution of magnetic bright points derived from Hinode/SOT observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The size distribution of magnetic bright points derived from Hinode/SOT observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The size distribution of magnetic bright points derived from Hinode/SOT observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-624578