Abstract
Multifrequency records of two total eclipses of the Sun—October 2, 1959, and February 15, 1961—have been analyzed. The position of the Moon's limb during increases and decreases of the slopes of the eclipse curve has been compared with optical maps and radio heliograms in an attempt to study the bright radio regions on the Sun. Angular diameters of a few enhanced regions were found to vary between 0.75 and 1.25 minutes of arc. The brightness temperature of one region was 1.5 × 10 5 °K at 9700 mc and 9 × 10 5 °K at 1270 mc. The heights of emitting regions at various freqeuncies were calculated in two cases. No conclusions as to limb brightening could be reached because of the presence of the enhanced radio regions near both limbs during both eclipses. The residual energy at totality on October 2 was approximately 20% at both 1300 and 3000 mc; on February 15, it was 8.6% at 9700 mc and 25.3% at 1270 mc.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
