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Acceleration Phenomena Observed by Interplanetary Scintillation at 0.1–0.3 AU

Published online by Cambridge University Press:  12 April 2016

M. Kojima ,
H. Misawa ,
H. Watanabe  and
Y. Yamauchi
M. Kojima
Affiliation:
Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa 442, Japan
H. Misawa
Affiliation:
Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa 442, Japan
H. Watanabe
Affiliation:
Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa 442, Japan
Y. Yamauchi
Affiliation:
Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa 442, Japan

Abstract

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Interplanetary scintillation has observed high-latitude streams which show low speeds (≤400 km/s) within 0.3 AU and high speeds (≥700 km/s) beyond 0.3 AU. The foot points of these streams were located in the Hel coronal holes or at their boundaries. Since the IPS measurement is biased by one or several mechanisms, we investigated whether this acceleration phenomena could be caused by bias effects or not. Speed increase of more than 100 km/s is left without being explained by the bias effects.

Keywords

Interplanetary scintillationsolar wind accelerationturbulence levelwithin 0.3 AU
Type
IPS and Other Remote Sensing Measurements
Information
International Astronomical Union Colloquium , Volume 154: Solar and Interplanetary Transients , 1996 , pp. 229 - 237
Copyright
Copyright © Kluwer 1997

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