`1.3-Year' and `153-day' Periodicities in the Sun's Surface Rotation

Details `1.3-Year' and `153-day' Periodicities in the Sun's Surface Rotation `1.3-Year' and `153-day' Periodicities in the Sun's Surface Rotation

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basi...31..317j&link_type=abstract

Bulletin of the Astronomical Society of India, vol. 31, p.317-318

Astronomy and Astrophysics

Astronomy

2

Sun: Surface Rotation-Solar Activity

Scientific paper

Using the daily Mt. Wilson velocity data during 1986-1994, we found 1.3
± 0.1 yr periodicity - is dominant in the Sun's surface `mean'
rotation rate (A ) during 1986-1994 (solar cycle 22). A 153 ± 5 -
day periodicity found to be substantially significant in A during the
decay phase of solar cycle 22.

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