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Interplanetary scintillation signatures in the inner heliosphere of the deepest solar minimum in the past 100 years

Published online by Cambridge University Press:  18 July 2013

Susanta Kumar Bisoi  and
P. Janardhan
Susanta Kumar Bisoi
Affiliation:
Physical Research Laboratory, Astronomy & Astrophysics Division, Ahmedabad 380 009, India email: [email protected]
P. Janardhan
Affiliation:
Physical Research Laboratory, Astronomy & Astrophysics Division, Ahmedabad 380 009, India email: [email protected]
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Abstract

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We have used interplanetary scintillation (IPS) observations at 327 MHz spanning years 1983-2009 to study microturbulence levels in the inner heliosphere. We find that the microturbulence levels show a steady and significant drop in the entire inner heliosphere starting from around 1995. The fact that the solar polar fields have also shown a similar declining trend provides a consistent result showing the buildup to the solar minimum between the solar cycles 23 and 24, the deepest in the past 100 years, actually began more than a decade earlier.

Keywords

Sun: magnetic fieldsMicorturbulenceInterplanetray scintillation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 83 - 84
Copyright
Copyright © International Astronomical Union 2013 

References

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Nandy, D., Munoz-Jaramillo, A., & Martens, P. C. H. 2011, Nature, 471, 80 Google Scholar