FACULAR AND SUNSPOT AREAS DURING SOLAR CYCLES 22 AND 23

摘要: We present an analysis of facular/network and sunspot areas (and their ratio) covering most cycle 22 all 23. The data are corrected (in microhemispheres) from full-disk solar images using two photometric telescopes at the San Fernando Observatory, CFDT1 CFDT2. Images CFDT2 have approximately twice spatial resolution CFDT1. Sunspot obtained red where spots determined as those pixels darker than ?8.5%. Facular/network Ca II K-line are?brighter 4.8%. Regressions facular area versus spot for give a slope term 25. For CFDT2, is 33. average ratio to 45 23 42. These values substantially higher earlier studies. increase due combination removal correction factor in ?. 0.3?nm images, 138 six years A relation given dependence on contrast. relationship linear both telescopes.