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Solar cycle changes of large-scale solar wind structure

Published online by Cambridge University Press:  26 February 2010

P. K. Manoharan*
Affiliation:
Radio Astronomy Centre, National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Udhagamandalam (Ooty), 643001, India email: mano@ncra.tifr.res.in
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Abstract

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In this paper, I present the results on large-scale evolution of density turbulence of solar wind in the inner heliosphere during 1985–2009. At a given distance from the Sun, the density turbulence is maximum around the maximum phase of the solar cycle and it reduces to ~70%, near the minimum phase. However, in the current minimum of solar activity, the level of turbulence has gradually decreased, starting from the year 2005, to the present level of ~30%. These results suggest that the source of solar wind changes globally, with the important implication that the supply of mass and energy from the Sun to the interplanetary space has significantly reduced in the present low level of activity.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

References

Hewish, A.Scott, P. F., & Wills, D. 1964, Nature, 203, 1214CrossRefGoogle Scholar
Manoharan, P. K. 1993, Solar Physics, 148, 153CrossRefGoogle Scholar
Manoharan, P. K., et al. 2000, ApJ, 350, 1061CrossRefGoogle Scholar
Manoharan, P. K. 2008, in Physics of the Sun and its Atmosphere, 235, WSP, SingaporeGoogle Scholar
Swarup, G., et al. 1971, Nature Phys. Sci., 230, 185CrossRefGoogle Scholar
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