Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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Do Inner Planets Modulate the Solar Wind Velocity at 1 AU from the Sun?

  • Kim, Jung-Hee (Department of Astronomy and Atmospheric Sciences, BK21 plus team, Kyungpook National University) ;
  • Chang, Heon-Young (Department of Astronomy and Atmospheric Sciences, BK21 plus team, Kyungpook National University)
  • Received : 2014.01.27
  • Accepted : 2014.02.19
  • Published : 2014.03.15
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Abstract

Quite recently, it has been suggested that the interaction of the solar wind with Mercury results in the variation in the solar wind velocity in the Earth's neighborhood during inferior conjunctions with Mercury. This suggestion has important implications both on the plasma physics of the interplanetary space and on the space weather forecast. In this study we have attempted to answer a question of whether the claim is properly tested. We confirm that there are indeed ups and downs in the profile of the solar wind velocity measured at the distance of 1 AU from the Sun. However, the characteristic attribute of the variation in the solar wind velocity during the inferior conjunctions with Mercury is found to be insensitive to the phase of the solar cycles, contrary to an earlier suggestion. We have found that the cases of the superior conjunctions with Mercury and of even randomly chosen data sets rather result in similar features. Cases of Venus are also examined, where it is found that the ups and downs with a period of ~ 10 to 15 days can be also seen. We conclude, therefore, that those variations in the solar wind velocity turn out to be a part of random fluctuations and have nothing to do with the relative position of inner planets. At least, one should conclude that the solar wind velocity is not a proper observable modulated by inner planets at the distance of 1 AU from the Sun in the Earth's neighborhood during inferior conjunctions.

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References

  1. Anderson BJ, Acuna MH, Korth H, Purucker ME, Johnson CL, et al., The Structure of Mercury's Magnetic Field from MESSENGER's First Flyby, Sci., 321, 82-85 (2008). http://dx.doi.org/10.1126/science.1159081
  2. Anderson BJ, Johnson CL, Korth H, Purucker ME, Winslow RM, et al., The Global Magnetic Field of Mercury from MESSENGER Orbital Observations, Sci., 333, 1859-1862 (2011). http://dx.doi.org/10.1126/science.1211001
  3. Birch, PC, Chapman, SC, Detailed Structure and Dynamics in Particle-In-Cell Simulations of the Lunar Wake, Phys. Plasmas, 8, 4551-4559 (2001). http://dx.doi.org/10.1063/1.1398570
  4. Chang, HY, Maximum Sunspot Numbers and Active Days, JASS, 30, 163-168 (2013). http://dx.doi.org/10.5140/JASS.2013.30.4.241
  5. Farrell, WM, Kaiser, ML, Steinberg, JT, Bale, SD, A Simple Simulation of a Plasma Void: Applications to Wind Observations of the Lunar Wake, JGR, 103, 23653-23660 (1998). http://dx.doi.org/10.1029/97JA03717
  6. Fujimoto, M, Baumjohann, W, Kabin, K, Nakamura, R, Slavin, JA, et al., Hermean Magnetosphere-Solar Wind Interaction, Space Sci. Rev., 132, 529-550 (2007). http://dx.doi.org/10.1007/s11214-007-9245-8
  7. Halekas, JS, Saito, Y, Delory, GT, Farrell, WM, New Views of the Lunar Plasma Environment, Planet. Space Sci., 59, 1682-1694 (2011). http://dx.doi.org/10.1016/j.pss.2010.08.011
  8. Harnett, EM, Winglee, RM, Flux Rope Passage at the Moon while in the Terrestrial Magnetotail, AdSpR, 52, 243-250 (2013). http://dx.doi.org/10.1016/j.asr.2013.03.012
  9. Kabin, K, Gombosi, TI, DeZeeuw, DL, Powell, KG, Interaction of Mercury with the Solar Wind, Icarus, 143, 397-406 (2000). http://dx.doi.org/10.1006/icar.1999.6252
  10. Ness, NF, Behannon, KW, Lepping, RP, Whang, YC, The Magnetic Field of Mercury, JGR., 80, 2708-2716 (1975). http://dx.doi.org/10.1029/JA080i019p02708
  11. Nikulin, IF, Modulation of the Solar Wind Velocity by Mercury, submitted to Planet. Space Sci. (2013).
  12. Nishino, MN, Fujimoto, M, Saito, Y, Tsunakawa, H, Kasahara, Y, et al., Type-II Entry of Solar Wind Protons into the Lunar Wake: Effects of Magnetic Connection to the Night-Side Surface, Planet. Space Sci., 87, 106-114 (2013). http://dx.doi.org/10.1016/j.pss.2013.08.017
  13. Nishino, MN, Fujimoto, M, Saito, Y, Yokota, S, Kasahara, Y, et al., Effect of the Solar Wind Proton Entry into the Deepest Lunar Wake, GRL, 37, L12106 (2010). http://dx.doi.org/10.1029/2010GL043948
  14. Nishino, MN, Wang, X-D, Fujimoto, M, Tsunakawa, H, Saito, Y, et al., Anomalous deformation of the Earth's Bow Shock in the Lunar Wake: Joint Measurement by Chang'E-1 and SELENE, Planet. Space Sci., 59, 378-386 (2011). http://dx.doi.org/10.1016/j.pss.2011.01.002
  15. Raines, JM, Slavin, JA, Zurbuchen, TH, Gloeckler, G, Anderson, BJ, et al., MESSENGER Observations of the Plasma Environment near Mercury, Planet. Space Sci., 59, 2004-2015 (2011). http://dx.doi.org/10.1016/j.pss.2011.02.004
  16. Richer, E, Modolo, R, Chanteur, GM, Hess, S, Leblanc, F, A Global Hybrid Model for Mercury's Interaction with the Solar Wind: Case Study of the Dipole Representation, JGR, 117, A10228 (2012). http://dx.doi.org/10.1029/2012JA017898
  17. Saito, Y, Yokota, S, Tanaka, T, Asamura, K, Nishino, MN, et al., Solar Wind Proton Reflection at the Lunar Surface: Low Energy Ion Measurement by Map-Pace onboard SELENE (KAGUYA), GRL, 35, L24205 (2008). http://dx.doi.org/10.1029/2008GL036077

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