Spatial Distribution and North-South Asymmetry of Coronal Bright Points from Mid-1998 to Mid-1999

Details Spatial Distribution and North-South Asymmetry of Coronal Bright Points from Mid-1998 to Mid-1999 Spatial Distribution and North-South Asymmetry of Coronal Bright Points from Mid-1998 to Mid-1999

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005soph..231...29b&link_type=abstract

Solar Physics, Volume 231, Issue 1-2, pp. 29-44

Physics

6

Scientific paper

Full-disc full-resolution (FDFR) solar images obtained with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) were used to analyse the centre-to-limb function and latitudinal distribution of coronal bright points. The results obtained with the interactive and the automatic method, as well as for three subtypes of coronal bright points for the time period 4 June 1998 to 22 May 1999 are presented and compared. An indication of a two-component latitudinal distribution of coronal bright points was found. The central latitude of coronal bright points traced with the interactive method lies between 10∘ and 20∘. This is closer to the equator than the average latitude of sunspots in the same period. Possible implications for the interpretation of the solar differential rotation are discussed. In the appendix, possible differences between the two solar hemispheres are analysed. More coronal bright points were present in the southern solar hemisphere than in the northern one. This asymmetry is statistically significant for the interactive method and not for the automatic method. The visibility function is symmetrical around the central meridian.

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