Physics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...97..203s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 97, May 1985, p. 203-212.
Physics
17
Faculae, Power Spectra, Solar Activity, Solar Cycles, Solar Rotation, Sunspots, Calcium, Doppler Effect, Fraunhofer Lines
Scientific paper
Daily calcium plage areas for the period 1951-1981 (which include the solar cycle 19 and 20) have been used to derive the rotation period of the sun at latitude belts 10-15 deg N, 15-20 deg N, 10-15 deg S, and 15-20 deg S, and also for the entire visible solar disk. The mean rotation periods derived from 10-20 deg S and N, total active area and sunspot numbers were 27.5, 27.9, and 27.8 days (synodic), respectively. A power spectral analysis of the derived rotation rate as a function of time indicates that the rotation rate in each latitude belt varies over time scales ranging from the solar activity cycle, down to about 2 years. Variations in adjacent latitude belts are in phase, whereas those in different hemispheres are not correlated. The rotation rates derived from sunspot numbers also behave similarly, though the dependence over the solar cycle are not very apparent. The total plage areas, integrated over the entire visible hemisphere of the sun, shows a dominant periodicity of 7 years in rotation rate, while the other time scales are also discernible.
Prabhu Tushar P.
Singh Jaivir
No associations
LandOfFree
Variations in the solar rotation rate derived from Ca(+) K plage areas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Variations in the solar rotation rate derived from Ca(+) K plage areas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variations in the solar rotation rate derived from Ca(+) K plage areas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1633607