Speckle imaging of solar small scale structure. 2: Study of small scale structure in active regions

Details Speckle imaging of solar small scale structure. 2: Study of small scale structure in active regions Speckle imaging of solar small scale structure. 2: Study of small scale structure in active regions

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..889v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 3, p. 889-910

Astronomy and Astrophysics

Astrophysics

23

Continuous Radiation, Faculae, Solar Activity, Solar Granulation, Astronomical Photometry, Calcium, Image Reconstruction, Solar Magnetic Field, Speckle Interferometry

Scientific paper

The speckle imaging technique which is described in the first paper of this series (von der Luehe 1993) was used to analyze time series of high angular resolution images of solar small scale structure at a wavelength of 585 nm in active regions with the 76 cm diameter vacuum tower telescope at National Solar Observatory (NSO)/Sac Peak. Two sets of reconstructed images with a field of 4 by 4 arcsec which cover a period of 36 min and 83 min were generated and analyzed. The image reconstructions are supplemented with simultaneous large field photographs taken within a 15 A passband centered on the Ca II K (3933) line. The prime objective of the observing program was the study of the structure and the dynamics of the continuum wavelength counterpart of facular points which appear with high contrast in the Ca pictures, i.e., continuum bright points (CBPs). In addition to CBPs, the reconstructions allow studying other small scale phenomena. Results of the studies are given.

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