Abstract
We present observations from the first passage through the lunar plasma wake by one of two spacecraft comprising ARTEMIS (Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon’s Interaction with the Sun), a new lunar mission that re-tasks two of five probes from the THEMIS magnetospheric mission. On Feb 13, 2010, ARTEMIS probe P1 passed through the wake at ∼3.5 lunar radii downstream from the Moon, in a region between those explored by Wind and the Lunar Prospector, Kaguya, Chandrayaan, and Chang’E missions. ARTEMIS observed interpenetrating proton, alpha particle, and electron populations refilling the wake along magnetic field lines from both flanks. The characteristics of these distributions match expectations from self-similar models of plasma expansion into vacuum, with an asymmetric character likely driven by a combination of a tilted interplanetary magnetic field and an anisotropic incident solar wind electron population. On this flyby, ARTEMIS provided unprecedented measurements of the interpenetrating beams of both electrons and ions naturally produced by the filtration and acceleration effects of electric fields set up during the refilling process. ARTEMIS also measured electrostatic oscillations closely correlated with counter-streaming electron beams in the wake, as previously hypothesized but never before directly measured. These observations demonstrate the capability of the comprehensively instrumented ARTEMIS spacecraft and the potential for new lunar science from this unique two spacecraft constellation.
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References
V. Angelopoulos, The THEMIS mission. Space Sci. Rev. 141, 5–34 (2008)
H.U. Auster, K.H. Glassmeier, W. Magnes, O. Avdogar, W. Baumjohann, D. Constantinescu, D. Fischer, K.H. Fornacon, E. Georgescu, P. Harvey, O. Hillenmaier, R. Kroth, M. Ludlam, Y. Narita, R. Nakamura, K. Okrafka, F. Plaschke, I. Richter, H. Schwarzl, B. Stoll, A. Valavanoglou, M. Wiedemann, The THEMIS fluxgate magnetometer. Space Sci. Rev. 141, 235–264 (2008)
S.D. Bale, C.J. Owen, J.-L. Bougeret, K. Goetz, P.J. Kellogg, R.P. Lin, R. Manning, S.J. Monson, Evidence of currents and unstable particle distributions in an extended region around the lunar wake. Geophys. Res. Lett. 24, 1427–1430 (1997)
P.C. Birch, S.C. Chapman, Particle-in-cell simulations of the lunar wake with high phase space resolution. Geophys. Res. Lett. 28, 219 (2001a)
P.C. Birch, S.C. Chapman, Detailed structure and dynamics in particle-in-cell simulations of the lunar wake. Phys. Plasmas 8, 4551–4559 (2001b)
J.W. Bonnell, F.S. Mozer, G.T. Delory, A.J. Hull, R.E. Ergun, C.M. Cully, V. Angelopoulos, P.R. Harvey, The electric field instrument (EFI) for THEMIS. Space Sci. Rev. 141, 303–341 (2008)
D. Clack, J.C. Kasper, A.J. Lazarus, J.T. Steinberg, W.M. Farrell, Wind observations of extreme ion temperature anisotropies in the lunar wake. Geophys. Res. Lett. 31, L06812 (2004). doi:10.1029/2003GL018298
D.S. Colburn, R.G. Currie, J.D. Mihalov, C.P. Sonett, Diamagnetic solar-wind cavity discovered behind moon. Science 158, 1040 (1967)
J.E. Crow, P.L. Auer, J.E. Allen, The expansion of plasma into a vacuum. J. Plasma Phys. 14, 65–76 (1975)
J. Denavit, Collisionless plasma expansion into a vacuum. Phys. Fluids 22, 1384–1392 (1979)
P. Dyal, C.W. Parkin, W.D. Daily, Magnetism and the interior of the Moon. Rev. Geophys. Space Phys. 12, 568–591 (1974)
W.M. Farrell, R.J. Fitzenreiter, C.J. Owen, J.B. Byrnes, R.P. Lepping, K.W. Ogilvie, F. Neubauer, Upstream ULF waves and energetic electrons associated with the lunar wake: Detection of precursor activity. Geophys. Res. Lett. 23, 1271–1274 (1996)
W.M. Farrell, M.L. Kaiser, J.T. Steinberg, S.D. Bale, A simple simulation of a plasma void: Applications to Wind observations of the lunar wake. J. Geophys. Res. 103, 23653–23660 (1998)
J.W. Freeman Jr., M.A. Fenner, H.K. Hills, Electric potential of the Moon in the solar wind. J. Geophys. Res. 78, 4560–4567 (1973)
S.A. Fuselier, D.A. Gurnett, R.J. Fitzenreiter, The downshift of electron plasma oscillations in the electron foreshock region. J. Geophys. Res. 90, 3935–3946 (1985)
Y. Futaana, S. Machida, Y. Saito, A. Matsuoka, H. Hayakawa, Counterstreaming electrons in the near vicinity of the Moon observed by plasma instruments on board NOZOMI. J. Geophys. Res. 106, 18729–28740 (2001)
Y. Futaana, S. Barabash, M. Weiser, M. Holmstrom, A. Bhardwaj, M.B. Dhanya, R. Sridharan, P. Wurz, A. Schaufelberger, K. Asamura, Protons in the near lunar wake observed by the Sub-keV Atom Reflection Analyzer on board Chandrayaan-1. J. Geophys. Res. 115, A10248 (2010). doi:10.1029/2010JA015264
J.S. Halekas, S.D. Bale, D.L. Mitchell, R.P. Lin, Magnetic fields and electrons in the lunar plasma wake. J. Geophys. Res. 110, A07222 (2005). doi:10.1029/2004JA010991
J.S. Halekas, G.T. Delory, D.A. Brain, R.P. Lin, D.L. Mitchell, Density cavity observed over a strong lunar crustal magnetic anomaly in the solar wind: A mini-magnetosphere? Planet. Space Sci. 56/7, 941–946 (2008a). doi:10.1016/j.pss.2008.01.008
J.S. Halekas, G.T. Delory, R.P. Lin, T.J. Stubbs, W.M. Farrell, Lunar Prospector observations of the electrostatic potential of the lunar surface and its response to incident currents. J. Geophys. Res. 113, A09102 (2008b). doi:10.1029/2008JA013194
M. Holmström, M. Weiser, S. Barabash, Y. Futaana, A. Bhardwaj, Dynamics of solar wind protons reflected by the Moon. J. Geophys. Res. (2010). doi:10.1029/2009JA014843
E. Kallio, Formation of the lunar wake in quasi-neutral hybrid model. Geophys. Res. Lett. 32, L06107 (2005). doi:10.1029/2004GL021989
S. Kimura, T. Nakagawa, Electromagnetic full particle simulation of the electric field structure around the moon and the lunar wake. Earth Planets Space 60, 591–599 (2008)
R.P. Lin, D.L. Mitchell, D.W. Curtis, K.A. Anderson, C.W. Carlson, J. McFadden, M.H. Acuña, L.L. Hood, A. Binder, Lunar surface magnetic fields and their interaction with the solar wind: Results from Lunar Prospector. Science 281, 1480–1484 (1998)
J.P. McFadden, C.W. Carlson, D. Larson, M. Ludlam, R. Abiad, B. Elliott, P. Turin, M. Marckwordt, V. Angelopoulos, The THEMIS ESA plasma instrument and in-flight calibration. Space Sci. Rev. 141, 277–302 (2008)
T. Nakagawa, Y. Takahashi, M. Iizima, GEOTAIL observation of upstream ULF waves associated with the lunar wake. Earth Planets Space 55, 569–580 (2003)
N.F. Ness, Interaction of the solar wind with the Moon, in Solar Terrestrial Physics/1970, Part II, ed. by E.R. Dyer (Reidel, Dordrecht, 1972), pp. 159–205
N.F. Ness, K.W. Behannon, C.S. Searce, S.C. Cantarano, Early results from the magnetic field instrument on Lunar Explorer 35. J. Geophys. Res. 72, 5769–5778 (1967)
M.N. Nishino, K. Maezawa, M. Fujimoto, Y. Saito, S. Yokota, K. Asamura, T. Tanaka, H. Tsunakawa, M. Matsushima, F. Takahashi, T. Terasawa, H. Shibuya, H. Shimizu, Pairwise energy gain-loss feature of solar wind protons in the near-Moon wake. Geophys. Res. Lett. 36, L12108 (2009a). doi:10.1029/2009GL039049
M.N. Nishino, M. Fujimoto, K. Maezawa, Y. Saito, S. Yokota, K. Asamura, T. Tanaka, H. Tsunakawa, M. Matsushima, F. Takahashi, T. Terasawa, H. Shibuya, H. Shimizu, Solar-wind proton access deep into the near-Moon wake. Geophys. Res. Lett. 36, L16103 (2009b). doi:10.1029/2009GL039444
K.W. Ogilvie, J.T. Steinberg, R.J. Fitzenreiter, C.J. Owen, A.J. Lazarus, W.M. Farrell, R.B. Torbert, Observations of the lunar plasma wake from the WIND spacecraft on December 27, 1994. Geophys. Res. Lett. 10, 1255–1258 (1996)
C.J. Owen, R.P. Lepping, K.W. Ogilvie, J.A. Slavin, W.M. Farrell, J.B. Byrnes, The lunar wake at 6.8 R L : WIND magnetic field observations. Geophys. Res. Lett. 10, 1263–1266 (1996)
A. Roux, O. le Contel, C. Coillot, A. Bouabdellah, B. de la Porte, D. Alison, S. Ruocco, M.C. Vassal, The search coil magnetometer for THEMIS. Space Sci. Rev. 141, 265–275 (2008)
C.T. Russell, B.R. Lichtenstein, On the source of lunar limb compression. J. Geophys. Res. 80, 4700 (1975)
Y. Saito, S. Yokota, T. Tanaka, K. Asamura, M.N. Nishino, M. Fujimoto, H. Tsunakawa, H. Shibuya, M. Matsushima, H. Shimizu, F. Takahashi, T. Mukai, T. Terasawa, Solar wind proton reflection at the lunar surface: Low energy ion measurements by MAP-PACE onboard SELENE (KAGUYA). Geophys. Res. Lett. 35, L24205 (2008). doi:10.1029/2008GL036077
Y. Saito, S. Yokota, K. Asamura, T. Tanaka, M.N. Nishino, T. Yamamoto, Y. Terakawa, M. Fujimoto, H. Hasegawa, H. Hayakawa, M. Hirahara, M. Hoshino, S. Machida, T. Mukai, T. Nagai, T. Nagatsuma, T. Nakagawa, M. Nakamura, K. Oyama, E. Sagawa, S. Sasaki, K. Seki, I. Shinohara, T. Terasawa, H. Tsunakawa, H. Shibuya, M. Matsushima, H. Shimizu, F. Takahashi, In-flight performance and initial results of Plasma energy Angle and Composition Experiment (PACE) on SELENE (Kaguya). Space Sci. Rev. 154(1–4), 265–303 (2010). doi:10.1007/s11214-010-9647-x
U. Samir, K.H. Wright Jr., N.H. Stone, The expansion of a plasma into a vacuum: Basic phenomena and processes and applications to space plasma physics. Rev. Geophys. 21, 1631–1646 (1983)
G. Schubert, B.R. Lichtenstein, Observations of Moon-plasma interactions by orbital and surface experiments. Rev. Geophys. 12, 592–626 (1974)
N. Singh, R.W. Schunk, Numerical calculations relevant to the initial expansion of the polar wind. J. Geophys. Res. 87, 9154–9170 (1982)
P. Trávnicek, P. Hellinger, Structure of the lunar wake: Two-dimensional global hybrid simulations. Geophys. Res. Lett. 32, L06102 (2005). doi:10.1029/2004GL022243
X.-D. Wang, W. Bian, J.-S. Wang, J.-J. Liu, Y.-L. Zou, H.-B. Zhang, C. Lü, J.-Z. Liu, W. Zuo, Y. Su, W.-B. Wen, M. Wang, Z.-Y. Ouyang, C.-L. Li, Acceleration of scattered solar wind protons at the polar terminator of the Moon: Results from Chang’E-1/SWIDs. Geophys. Res. Lett. 37, L07203 (2010). doi:10.1029/2010GL042891
M. Wieser, S. Barabash, Y. Futaana, M. Holmstrom, A. Bhardwaj, R. Sridharan, M.B. Dhanya, P. Wurz, A. Schaufelberger, K. Asamura, Extremely high reflection of solar wind protons as neutral hydrogen atoms from regolith in space. Planet. Space Sci. (2009). doi:10.1016/j.pss.2009.09.012
M. Wieser, S. Barabash, Y. Futaana, M. Holmstrom, A. Bhardwaj, R. Sridharan, M.B. Dhanya, P. Wurz, A. Schaufelberger, K. Asamura, First observation of a mini-magnetosphere above a lunar magnetic anomaly using energetic neutral atoms. Geophys. Res. Lett. 37, L015103 (2010). doi:10.1029/2009GL041721
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Halekas, J.S., Angelopoulos, V., Sibeck, D.G. et al. First Results from ARTEMIS, a New Two-Spacecraft Lunar Mission: Counter-Streaming Plasma Populations in the Lunar Wake. Space Sci Rev 165, 93–107 (2011). https://doi.org/10.1007/s11214-010-9738-8
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DOI: https://doi.org/10.1007/s11214-010-9738-8