Abstract
Multiple current sheet crossings are ubiquitous features of the solar wind associated with high-beta plasma sheets, notably during the passage of the heliospheric current sheet (HCS). As the HCS is being convected past near-Earth, we attempt to resolve spatial scales and temporal variations of the apparent layered structure of the HCS, including adjacent large scale field reversals. We use several spacecraft for good spatial and cross-scale coverage, spanning 550 RE across and 900 RE along the Sun – Earth line: STEREO, ACE and Cluster. The multi-spacecraft magnetic and plasma observations within the leading edge of the sector boundary are consistent with i) a broad multi-layered structure; ii) occasional non-planar structures and Alfvénic fluctuations; iii) various stages of transient outflowing loops formed by interchange reconnection. By comparison of the observations at each spacecraft, we obtain a synthesis of the evolution between the patterns of loops, and hence of the transient outflow evolution along the sector boundary. In particular, we present circumstantial evidence that a heat flux dropout, traditionally signalling disconnection, can arise from interchange reconnection and scattering. Moreover, the inter-spacecraft comparison eliminates ambiguities between interpretations of electron counterstreaming. Overall, the sector boundary layer remains, locally, a steady structure as it is convected in the solar wind across a radial heliospheric distance of 560 – 580 RE. However, non-planar structures on the Cluster spatial scale, as well as the variations in angular changes and transition durations on the broader scale, indicate that we are not following the evolution of single loops but more likely a bunch of loops with variable properties.
Similar content being viewed by others
References
Acuña, M.H., Curtis, D., Scheifele, J.L., Russell, C.T., Schroeder, P., Szabo, A., et al.: 2008, The STEREO/IMPACT magnetic field experiment. Space Sci. Rev. 136, 203.
Balogh, A., Carr, C.M., Acuña, M.H., Dunlop, M.W., Beek, T.J., Brown, P., et al.: 2001, The cluster magnetic field investigation: overview of in-flight performance and initial results. Ann. Geophys. 19, 1207.
Bame, S.J., Asbridge, J.R., Feldman, W.C., Gosling, J.T., Paschmann, G., Skopke, N.: 1980, Deceleration of the solar wind upstream from the Earth’s bow shock and the origin of diffuse upstream ions. J. Geophys. Res. 85, 2981.
Behannon, K.W., Neubauer, F.M., Barnstorf, H.: 1981, Fine-scale characteristics of interplanetary sector boundaries. J. Geophys. Res. 86, 3273.
Belcher, J.W., Davis, L., Jr.: 1971, Large-amplitude Alfvén waves in the interplanetary medium, 2. J. Geophys. Res. 76, 3534.
Blanco, J.J., Rodríguez-Pacheco, J., Hidalgo, M.A., Sequeiros, J.: 2006, Analysis of the heliospheric current sheet fine structure: single or multiple current sheets. J. Atmos. Solar-Terr. Phys. 68, 2173.
Bonifazi, C., Moreno, G., Lazarus, A.J., Sullivan, J.D.: 1980, Deceleration of the solar wind in the Earth’s foreshock region – ISEE 2 and IMP 8 observations. J. Geophys. Res. 85, 6031.
Borovsky, J.E.: 2008, Flux tube texture of the solar wind: strands of the magnetic carpet at 1 AU? J. Geophys. Res. 113, A08110.
Burlaga, L.F., Lemaire, J.F., Turner, J.M.: 1977, Interplanetary current sheets at 1 AU. J. Geophys. Res. 82, 3191.
Crooker, N.U., Pagel, C.: 2008, Residual strahls in solar wind electron dropouts: signatures of magnetic connection to the Sun, disconnection, or interchange reconnection? J. Geophys. Res. 113, A02106.
Crooker, N.U., Burton, M.E., Siscoe, G.L., Kahler, S.W., Gosling, J.T., Smith, E.J.: 1996, Solar wind streamer belt structure. J. Geophys. Res. 101, 24 331.
Crooker, N.U., Larson, D.E., Kahler, S.W., Lamassa, S.M., Spence, H.E.: 2003, Suprathermal electron isotropy in high-beta solar wind and its role in heat flux dropouts. Geophys. Res. Lett. 30(12), 1619.
Crooker, N.U., Huang, C.-L., Lamassa, S.M., Larson, D.E., Kahler, S.W., Spence, H.E.: 2004a, Heliospheric plasma sheets. J. Geophys. Res. 109, A03107.
Crooker, N.U., Kahler, S.W., Larson, D.E., Lin, R.P.: 2004b, Large-scale magnetic field inversions at sector boundaries. J. Geophys. Res. 109, A03108.
Fairfield, D.H.: 1971, Average and unusual location of the Earth’s magnetopause and bow shock. J. Geophys. Res. 76, 6700.
Feldman, W.C., Asbridge, J.R., Bame, S.J., Montgomery, M.D.: 1973, Solar wind heat transport in the vicinity of the Earth’s bow shock. J. Geophys. Res. 78, 3697.
Feldman, W.C., Anderson, R.C., Asbridge, J.R., Bame, S.J., Gosling, J.T., Zwickl, R.D.: 1982, Plasma electron signature of magnetic connection to the Earth’s bow shock – ISEE 3. J. Geophys. Res. 87, 632.
Fisk, L.A., Schwadron, N.A., Zurbuchen, T.H.: 1998, On the slow solar wind. Space Sci. Rev. 86, 51.
Foullon, C., Owen, C.J., Dasso, S., Green, L.M., Dandouras, I., Elliott, H.A., et al.: 2007, Multi-spacecraft study of the 21 January 2005 ICME. Evidence of current sheet substructure near the periphery of a strongly expanding, fast magnetic cloud. Solar Phys. 244, 139.
Galvin, A.B., Kistler, L.M., Popecki, M.A., Farrugia, C.J., Simunac, K.D.C., Ellis, L., et al.: 2008, The plasma and suprathermal ion composition (PLASTIC) investigation on the STEREO observatories. Space Sci. Rev. 136, 437.
Gosling, J.T., McComas, D.J.: 1987, Field line draping about fast coronal mass ejecta – A source of strong out-of-the-ecliptic interplanetary magnetic fields. Geophys. Res. Lett. 14, 355.
Gosling, J.T., Skoug, R.M., Feldman, W.C.: 2001, Solar wind electron halo depletions at 90deg pitch angle. Geophys. Res. Lett. 28, 4155.
Gosling, J.T., Skoug, R.M., McComas, D.J., Smith, C.W.: 2005, Magnetic disconnection from the Sun: observations of a reconnection exhaust in the solar wind at the heliospheric current sheet. Geophys. Res. Lett. 32, L05105.
Gosling, J.T., McComas, D.J., Skoug, R.M., Smith, C.W.: 2006, Magnetic reconnection at the heliospheric current sheet and the formation of closed magnetic field lines in the solar wind. Geophys. Res. Lett. 33, L17102.
Hollweg, J.V.: 1982, Surface waves on solar wind tangential discontinuities. J. Geophys. Res. 87, 8065.
Johnstone, A.D., Alsop, C., Burge, S., Carter, P.J., Coates, A.J., Coker, A.J., et al.: 1997, Peace: a plasma electron and current experiment. Space Sci. Rev. 79, 351.
Kahler, S., Lin, R.P.: 1994, The determination of interplanetary magnetic field polarities around sector boundaries using E greater than 2 keV electrons. Geophys. Res. Lett. 21, 1575.
Klein, L., Burlaga, L.F.: 1980, Interplanetary sector boundaries 1971 – 1973. J. Geophys. Res. 85, 2269.
Knetter, T., Neubauer, F.M., Horbury, T., Balogh, A.: 2004, Four-point discontinuity observations using Cluster magnetic field data: a statistical survey. J. Geophys. Res. 109, A06102.
Lavraud, B., Gosling, J.T., Rouillard, A., Fedorov, A., Opitz, A., Sauvaud, J.-A., et al.: 2009, Observation of a complex solar wind reconnection exhaust from spacecraft separated by over 1800 RE. Solar Phys. 256, 379.
Lepping, R.P., Wu, C.-C., McClernan, K.: 2003, Two-dimensional curvature of large angle interplanetary MHD discontinuity surfaces: IMP-8 and WIND observations. J. Geophys. Res. 108, 1279.
Lepping, R.P., Szabo, A., Peredo, M., Hoeksema, J.T.: 1996, Large-scale properties and solar connection of the heliospheric current and plasma sheets: WIND observations. Geophys. Res. Lett. 23, 1199.
Luhmann, J.G., Curtis, D.W., Schroeder, P., McCauley, J., Lin, R.P., Larson, D.E., et al.: 2008, STEREO IMPACT investigation goals, measurements, and data products overview. Space Sci. Rev. 136, 117.
McComas, D.J., Gosling, J.T., Phillips, J.L., Bame, S.J., Luhmann, J.G., Smith, E.J.: 1989, Electron heat flux dropouts in the solar wind – Evidence for interplanetary magnetic field reconnection? J. Geophys. Res. 94, 6907.
McComas, D.J., Bame, S.J., Barker, P., Feldman, W.C., Phillips, J.L., Riley, P., et al.: 1998, Solar wind electron proton alpha monitor (SWEPAM) for the advanced composition explorer. Space Sci. Rev. 86, 563.
Moldwin, M.B., Phillips, J.L., Gosling, J.T., Scime, E.E., McComas, D.J., Bame, S.J., et al.: 1995, Ulysses observation of a noncoronal mass ejection flux rope: evidence of interplanetary magnetic reconnection. J. Geophys. Res. 100, 19 903.
Nakagawa, T.: 1993, Solar source of the interplanetary planar magnetic structures. Solar Phys. 147, 169.
Nash, A.G., Sheeley, N.R., Jr., Wang, Y.-M.: 1988, Mechanisms for the rigid rotation of coronal holes. Solar Phys. 117, 359.
Neugebauer, M.: 1985, Alignment of velocity and field changes across tangential discontinuities in the solar wind. J. Geophys. Res. 90, 6627.
Neugebauer, M.: 2008, Heliospheric sector boundaries: single or multiple? J. Geophys. Res. 113, A12106.
Neugebauer, M., Alexander, C.J., Schwenn, R., Richter, A.K.: 1986, Tangential discontinuities in the solar wind – Correlated field and velocity changes and the Kelvin – Helmholtz instability. J. Geophys. Res. 91, 13 694.
Ogilvie, K.W., Scudder, J.D., Sugiura, M.: 1971, Electron energy flux in the solar wind. J. Geophys. Res. 76, 8165.
Owens, M.J., Crooker, N.U.: 2007, Reconciling the electron counterstreaming and dropout occurrence rates with the heliospheric flux budget. J. Geophys. Res. 112, A06106.
Pilipp, W.G., Muehlhaeuser, K.-H., Miggenrieder, H., Montgomery, M.D., Rosenbauer, H.: 1987, Characteristics of electron velocity distribution functions in the solar wind derived from the HELIOS plasma experiment. J. Geophys. Res. 92, 1075.
Rème, H., Aoustin, C., Bosqued, J.M., Dandouras, I., Lavraud, B., Sauvaud, J.A., et al.: 2001, First multispacecraft ion measurements in and near the Earth’s magnetosphere with the identical Cluster ion spectrometry (CIS) experiment. Ann. Geophys. 19, 1303.
Roberts, D.A., Klein, L.W., Goldstein, M.L., Matthaeus, W.H.: 1987, The nature and evolution of magnetohydrodynamic fluctuations in the solar wind – Voyager observations. J. Geophys. Res. 92, 11 021.
Roelof, E.C., Sibeck, D.G.: 1993, Magnetopause shape as a bivariate function of interplanetary magnetic field B z and solar wind dynamic pressure. J. Geophys. Res. 98, 21 421.
Rosenbauer, H., Schwenn, R., Marsch, E., Meyer, B., Miggenrieder, H., Montgomery, M.D., et al.: 1977, A survey on initial results of the HELIOS plasma experiment. J. Geophys. – Z. Geophys. 42, 561.
Rouillard, A.P., Savani, N., Davies, J.A., Lavraud, B., Forsyth, R.J., Morley, S.K., et al.: 2009, A multispacecraft analysis of a small scale transient entrained by solar wind streams. Solar Phys. 256, 307.
Russell, C.T., Mellott, M.M., Smith, E.J., King, J.H.: 1983, Multiple spacecraft observations of interplanetary shocks: four spacecraft determination of shock normals. J. Geophys. Res. 88, 4739.
Sauvaud, J.-A., Larson, D., Aoustin, C., Curtis, D., Médale, J.-L., Fedorov, A., et al.: 2008, The IMPACT solar wind electron analyzer (SWEA). Space Sci. Rev. 136, 227.
Smith, C.W., L’Heureux, J., Ness, N.F., Acuña, M.H., Burlaga, L.F., Scheifele, J.: 1998, The ACE magnetic fields experiment. Space Sci. Rev. 86, 613.
Smith, E.J.: 2001, The heliospheric current sheet. J. Geophys. Res. 106, 15819.
Sonnerup, B.U.Ö., Scheible, M.: 1998, Minimum and maximum variance analysis. In: Pashmann, G., Daly, P.W. (eds.) Analysis Methods for Multi-Spacecraft Data, ISSI Scientific Report SR-001, Bern, Chap. 8, 185.
Stansberry, J.A., Gosling, J.T., Thomsen, M.F., Bame, S.J., Smith, E.J.: 1988, Interplanetary magnetic field orientations associated with bidirectional electron heat fluxes detected at ISEE 3. J. Geophys. Res. 93, 1975.
Suess, S.T., McComas, D.J., Bame, S.J., Goldstein, B.E.: 1995, Solar wind eddies and the heliospheric current sheet. J. Geophys. Res. 100, 12 261.
Tsurutani, B.T., Ho, C.M., Smith, E.J., Neugebauer, M., Goldstein, B.E., Mok, J.S., et al.: 1994, The relationship between interplanetary discontinuities and Alfven waves: ULYSSES observations. Geophys. Res. Lett. 21, 2267.
Tsurutani, B.T., Lakhina, G.S., Verkhoglyadova, O.P., Echer, E., Guarnieri, F.L.: 2007, Comment on “Comment on the abundances of rotational and tangential discontinuities in the solar wind” by M. Neugebauer. J. Geophys. Res. 112, A03101.
Villante, U., Bruno, R., Mariani, F., Burlaga, L.F., Ness, N.F.: 1979, The shape and location of the sector boundary surface in the inner solar system. J. Geophys. Res. 84, 6641.
Wang, Y.-M., Nash, A.G., Sheeley, N.R., Jr.: 1989, Magnetic flux transport on the Sun. Science 245, 712.
Wang, Y.-M., Sheeley, N.R., Socker, D.G., Howard, R.A., Rich, N.B.: 2000, The dynamical nature of coronal streamers. J. Geophys. Res. 105, 25 133.
Wimmer-Schweingruber, R.F., Crooker, N.U., Balogh, A., Bothmer, V., Forsyth, R.J., Gazis, P., et al.: 2006, Understanding interplanetary coronal mass ejection signatures. Report of Working Group B. Space Sci. Rev. 123, 177.
Winterhalter, D., Smith, E.J., Burton, M.E., Murphy, N., McComas, D.J.: 1994, The heliospheric plasma sheet. J. Geophys. Res. 99, 6667.
Zurbuchen, T.H., Hefti, S., Fisk, L.A., Gloeckler, G., Schwadron, N.A., Smith, C.W., et al.: 2001, On the origin of microscale magnetic holes in the solar wind. J. Geophys. Res. 106, 16 001.
Author information
Authors and Affiliations
Corresponding author
Additional information
STEREO Results at Solar Minimum
Guest Editors: Eric R. Christian, Michael L. Kaiser, Therese A. Kucera, O.C. St. Cyr
Rights and permissions
About this article
Cite this article
Foullon, C., Lavraud, B., Wardle, N.C. et al. The Apparent Layered Structure of the Heliospheric Current Sheet: Multi-Spacecraft Observations. Sol Phys 259, 389–416 (2009). https://doi.org/10.1007/s11207-009-9452-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11207-009-9452-4