Do Inner Planets Modulate the Solar Wind Velocity at 1 AU from the Sun?

Kim, Jung-Hee; Chang, Heon-Young

doi:10.5140/jass.2014.31.1.1

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…1. Interestingly enough, the time scale of max-to-max or minto-min that can be found in each panel seems quite similar to that seen in Kim & Chang (2014), which is about 10 to 15 days. In Fig.…”

Section: Resultssupporting

confidence: 69%

“…This question is of prime importance since it has implications both on the plasma physics of the interplanetary space and on the space weather forecast. Even though Kim & Chang (2014) have shown that the variation in the solar wind velocity turns out to be a part of random fluctuations, this does not necessarily mean an impossibility of survival of the hermean trace to the distance of 1 AU from the Sun in the Earth's neighborhood during inferior conjunctions with the inner planets. That is, one should only be able to consider that the solar wind velocity is not a proper observable modulated by the inner planets at the distance of 1 AU from the Sun.…”

Section: Introductionmentioning

confidence: 98%

“…He also suggested that the general tendencies are less expressed at the stage of the ascending phase of the solar cycle 23 than those of the descending phase of the solar cycle 23 and the ascending phase of the solar cycle 24. More recently, however, Kim & Chang (2014) have disputed his conclusions by analyzing the daily velocity of the solar wind for periods of the superior conjunctions with Mercury and randomly chosen time series regardless of Mercury's relative position with respect to the Earth. They have also demonstrated that their findings can be reproduced with the cases of Venus.…”

Section: Introductionmentioning

confidence: 99%

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Do Inner Planets Modulate the Space Environment of the Earth?

Kim¹,

Chang²

2014

Journal of Astronomy and Space Sciences

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Variabilities in the solar wind cause disturbances throughout the heliosphere on all temporal and spatial scales, which leads to changeable space weather. As a view of space weather forecasting, in particular, it is important to know direct and indirect causes modulating the space environment near the Earth in advance. Recently, there are discussions on a role of the interaction of the solar wind with Mercury in affecting the solar wind velocity in the Earth's neighborhood during its inferior conjunctions. In this study we investigate a question of whether other parameters describing the space environment near the Earth are modulated by the inner planets' wake, by examining whether the interplanetary magnetic field and the proton density in the solar wind observed by the Advanced Composition Explorer (ACE) spacecraft, and the geomagnetic field via the Dst index and Auroral Electrojet index (AE index) are dependent upon the relative position of the inner planets. We find there are indeed apparent variations. For example, the mean variations of the geomagnetic fields measured in the Earth's neighborhood apparently have varied with a timescale of about 10 to 25 days. Those variations in the parameters we have studied, however, turn out to be a part of random fluctuations and have nothing to do with the relative position of inner planets. Moreover, it is found that variations of the proton density in the solar wind, the Dst index, and the AE index are distributed with the Gaussian distribution. Finally, we point out that some of properties in the behavior of the random fluctuation are to be studied.

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Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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