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Solar-Cycle variation in the photospheric mean velocity flows: GONG observations

Published online by Cambridge University Press:  27 November 2018

Brajesh Kumar Open the ORCID record for Brajesh Kumar [Opens in a new window]
Brajesh Kumar*
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Badi Road, Udaipur 313004, Rajasthan, India email: [email protected]
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Abstract

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The solar oscillation frequencies have shown variation over the solar activity cycle, which is believed to be the indicator of the structural and magnetic changes taking place in the Sun. The ground-based network of six identical solar telescopes in the Global Oscillation Network Group (GONG) program has been nearly-continuously observing the Sun since the last quarter of the year 1995 for Doppler imaging of the solar-disk aimed to study the oscillations and velocity flows on the surface of the Sun. In this work, we study the variations in the solar disk-integrated mean velocity flows on the solar surface as observed with the GONG over the complete Solar Cycle 23 and ongoing Cycle 24. The correlation analysis of these solar photospheric mean velocity flows relative to the various solar activity indicators is also discussed.

Keywords

Sun: activitySun: photosphereSun: atmospheric motions
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. 59 - 60
Copyright
Copyright © International Astronomical Union 2018 

References

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