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Long-term variations in meridional motion of sunspot groups: comparison of DPD and SOON data

Published online by Cambridge University Press:  27 November 2018

J. Javaraiah
J. Javaraiah*
Affiliation:
#58, BSK 5th Stage, Bikasipura, Bengaluru-560 078, India. email: jajj55@yahoo.co.in; jdotjavaraiah@gmail.com
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Abstract

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We have analyzed the Debrecen Photoheliographic Data (DPD) and the Solar Optical Observing Network (SOON) sunspot group data during the period 1977 – 2015 and find that during the maximum of solar cycle 23 there is a large difference in the mean meridional motion of sunspot groups determined from DPD and SOON data.

Keywords

Sun: activitySun: magnetic fields(Sun:) sunspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 51 - 52
Copyright
Copyright © International Astronomical Union 2018 

Footnotes

†

Formerly with Indian Institute of Astrophysics, Bengaluru-560 034.

References

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Javaraiah, J., 2010, A&A, 509, A30Google Scholar