Network and internetwork bright points in the solar chromosphere

Details Network and internetwork bright points in the solar chromosphere Network and internetwork bright points in the solar chromosphere

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..785t&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

1

Solar Chromosphere: Bright Points

Scientific paper

We investigate the properties of chromospheric bright points from time sequences of narrow-band filtergrams centered on the Ca II K2v emission peak at 393.3 nm. We compute power maps and extract the contributions with periods at 3 min and 5 min and find that the internetwork is dominated by the power at 3 min, whereas the network shows strong signal at 5 min, cospatial with concentrated magnetic field seen in the photosphere. We use image segmentation techniques to derive the size by means of the cell size and an effective diameter as well as the peak brightness and the local background intensity of the bright points.

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