Emeritus ProfessorStevenSchwartz

Masters A, Schwartz SJ, Henley EM, Thomsen MF, Zieger B, Coates AJ, Achilleos N, Mitchell J, Hansen KC, Dougherty MKet al., 2011, Electron heating at Saturn's bow shock, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380

• Author Web Link
• Open Access Link
• Cite
• Citations: 40

Eastwood JP, Schwartz SJ, Horbury TS, Carr CM, Glassmeier K-H, Richter I, Koenders C, Plaschke F, Wild JAet al., 2011, Transient Pc3 wave activity generated by a hot flow anomaly: Cluster, Rosetta, and ground-based observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380

• Author Web Link
• Cite
• Citations: 37

Dunlop MW, Bingham R, Chapman S, Escoubet P, Zhang Q-H, Shen C, Shi J-K, Trines R, Wicks R, Pu Z-Y, de-Keyser J, Schwartz S, Liu Z-Xet al., 2011, Use of multi-point analysis and modelling to address cross-scale coupling in space plasmas: Lessons from Cluster, \planss, Vol: 59, Pages: 630-638-630-638

• Cite

Nishino MN, Hasegawa H, Fujimoto M, Saito Y, Mukai T, Dandouras I, Rème H, Retinò A, Nakamura R, Lucek E, Schwartz SJet al., 2011, A case study of Kelvin\ndashHelmholtz vortices on both flanks of the Earth’s magnetotail, \planss, Vol: 59, Pages: 502-509-502-509

• Cite

Billingham L, Schwartz SJ, Wilber M, 2011, Foreshock cavities and internal foreshock boundaries, \planss, Vol: 59, Pages: 456-467-456-467

We present two case studies of Cluster encounters with foreshock cavities. For one event, we are able, for the first time, to accurately relate the observation of a foreshock cavity to the measured position of the bow shock. This allows us to compute the shock angle, a vital parameter in models of foreshock cavity formation, with greater confidence than any previous study. This cavity appears to be elongated along the magnetic field and we use the multispacecraft nature of the Cluster mission to constrain its field-parallel and perpendicular extent. We show that this event is embedded within a region of field-aligned ion beams. This is the first time a foreshock cavity has been shown to be surrounded by foreshock ion beams. A second foreshock cavity is associated with a small rotation in the Interplanetary Magnetic Field (IMF). We show that this event appears on the boundary between an interval when the spacecraft were inside the ion foreshock, and an excursion upstream. This is the first report of a foreshock cavity observed during the traversal of the global foreshock. This second event has some features expected from the new Sibeck et al. (2008) model of cavities as brief encounters with a spatial boundary in the global foreshock.

• Abstract
• Cite

Schwartz SJ, Hellinger P, Bale S, Owen C, Nakamura R, Vaivads A, Sorriso-Valvo L, Liu W, Wimmer-Schweingruber R, Fujimoto M, Mann Iet al., 2011, Preface, \planss, Vol: 59, Pages: 447-448-447-448

• Cite

Sigsbee K, Kletzing CA, Pickett JS, Gurnett DA, Schwartz SJ, Lefebvre B, Lucek E, Fazakerley AN, Kucharek Het al., 2010, Characteristics of Langmuir electric field waveforms and power spectra exhibiting nonlinear behavior in Earth’s foreshock, Journal of Geophysical Research (Space Physics), Vol: 115, Pages: A10251-A10251

• Cite

Alexandrova O, Saur J, Lacombe C, Mangeney A, Schwartz SJ, Mitchell J, Grappin R, Robert Pet al., 2010, Solar wind turbulent spectrum from MHD to electron scales, 12th International Solar Wind Conference, Publisher: AMER INST PHYSICS, Pages: 144-+, ISSN: 0094-243X

• Author Web Link
• Cite
• Citations: 19

Hasegawa H, Retinò A, Vaivads A, Khotyaintsev Y, André M, Nakamura TKM, Teh W-L, Sonnerup BUÖ, Schwartz SJ, Seki Y, Fujimoto M, Saito Y, Rème H, Canu Pet al., 2009, Kelvin-Helmholtz waves at the Earth’s magnetopause: Multiscale development and associated reconnection, Journal of Geophysical Research (Space Physics), Vol: 114, Pages: A12207-A12207

• Cite

Lefebvre B, Seki Y, Schwartz SJ, Mazelle C, Lucek EAet al., 2009, Reformation of an oblique shock observed by Cluster, Journal of Geophysical Research (Space Physics), Vol: 114, Pages: A11107-A11107

• Cite

Alexandrova O, Saur J, Lacombe C, Mangeney A, Mitchell J, Schwartz SJ, Robert Pet al., 2009, Universality of Solar-Wind Turbulent Spectrum from MHD to Electron Scales, Physical Review Letters, Vol: 103, Pages: 165003-+-165003-+

• Cite

Lavraud B, Borovsky JE, Génot V, Schwartz SJ, Birn J, Fazakerley AN, Dunlop MW, Taylor MGGT, Hasegawa H, Rouillard AP, Berchem J, Bogdanova Y, Constantinescu D, Dandouras I, Eastwood JP, Escoubet CP, Frey H, Jacquey C, Panov E, Pu ZY, Shen C, Shi J, Sibeck DG, Volwerk M, Wild JAet al., 2009, Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio, \grl, Vol: 36, Pages: L18109-L18109

• Cite

Masters A, McAndrews HJ, Steinberg JT, Thomsen MF, Arridge CS, Dougherty MK, Billingham L, Schwartz SJ, Sergis N, Hospodarsky GB, Coates AJet al., 2009, Hot flow anomalies at Saturn’s bow shock, Journal of Geophysical Research (Space Physics), Vol: 114, Pages: A08217-A08217

• Cite

Schwartz SJ, Horbury T, Owen C, Baumjohann W, Nakamura R, Canu P, Roux A, Sahraoui F, Louarn P, Sauvaud J-A, Pin c con J-L, Vaivads A, Marcucci MF, Anastasiadis A, Fujimoto M, Escoubet P, Taylor M, Eckersley S, Allouis E, Perkinson M-Cet al., 2009, Cross-scale: multi-scale coupling in space plasmas, Experimental Astronomy, Vol: 23, Pages: 1001-1015-1001-1015

• Cite

Baumjohann W, Horbury T, Schwartz S, Canu P, Louarn P, Fujimoto M, Nakamura R, Owen C, Roux A, Vaivads Aet al., 2009, The Cross-Scale Mission, International Conference on Future Perspectives of Space Plasma and Particle Instrumentation and International Collaborations, Publisher: AMER INST PHYSICS, Pages: 25-+, ISSN: 0094-243X

• Author Web Link
• Cite

Matsui H, Torbert RB, Baumjohann W, Kucharek H, Schwartz SJ, Mouikis CG, Vaith H, Kistler LM, Lucek EA, Fazakerley AN, Miao B, Paschmann Get al., 2008, Oscillation of electron counts at 500 eV downstream of the quasi-perpendicular bow shock, Journal of Geophysical Research (Space Physics), Vol: 113, Pages: A08223-A08223

• Cite

Masters A, Arridge CS, Dougherty MK, Bertucci C, Billingham L, Schwartz SJ, Jackman CM, Bebesi Z, Coates AJ, Thomsen MFet al., 2008, Cassini encounters with hot flow anomaly-like phenomena at Saturn’s bow shock, \grl, Vol: 35, Pages: L02202-L02202

• Cite

Masood W, Schwartz SJ, 2008, Observations of the development of electron temperature anisotropies in Earth’s magnetosheath, Journal of Geophysical Research (Space Physics), Vol: 113, Pages: A01216-A01216

• Cite

Billingham L, Schwartz SJ, Sibeck DG, 2008, The statistics of foreshock cavities: results of a Cluster survey, Annales Geophysicae, Vol: 26, Pages: 3653-3667

We use Cluster magnetic field, thermal ion, and energetic particle observations upstream of the Earth's bow shock to investigate the occurrence patterns of foreshock cavities. Such cavities are thought to form when bundles of magnetic field connect to the quasi-parallel bow shock. Shock-processed suprathermal ions can then stream along the field, back against the flow of the solar wind. These suprathermals enhance the pressure on shock-connected field lines causing them to expand into the surrounding ambient solar wind plasma. Foreshock cavities exhibit depressions in magnetic field magnitude and thermal ion density, associated with enhanced fluxes of energetic ions. We find typical cavity duration to be few minutes with interior densities and magnetic field magnitudes dropping to ~60% of those in the surrounding solar wind. Cavities are found to occur preferentially in fast, moderate magnetic field strength solar wind streams. Cavities are observed in all parts of the Cluster orbit upstream of the bow shock. When localised in a coordinate system organised by the underlying physical processes in the foreshock, there is a systematic change in foreshock cavity location with IMF cone angle. At low (high) cone angles foreshock cavities are observed outside (inside) the expected upstream boundary of the intermediate ion foreshock.

• Abstract
• Publisher Web Link
• Cite

Lefebvre B, Schwartz SJ, Fazakerley AF, Décréau Pet al., 2007, Electron dynamics and cross-shock potential at the quasi-perpendicular Earth’s bow shock, Journal of Geophysical Research (Space Physics), Vol: 112, Pages: A09212-A09212

• Cite

Lobzin VV, Krasnoselskikh VV, Bosqued J-M, Pin c con J-L, Schwartz SJ, Dunlop Met al., 2007, Nonstationarity and reformation of high-Mach-number quasiperpendicular shocks: Cluster observations, \grl, Vol: 34, Pages: L05107-L05107

• Cite

Carr CM, Horbury TS, Balogh A, Bale SD, Baumjohann W, Bavassano B, Breen A, Burgess D, Cargill PJ, Crooker N, Erdös G, Fletcher L, Forsyth RJ, Giacalone J, Glassmeier KH, Hoeksema JT, Goldstein MX, Lockwood M, Magnes W, Maksimovic M, Marsch E, Matthaeus WH, Murphv N, Nakariakov VM, Pacheco JR, Pincon JL, Riley P, Russell CT, Schwartz SJ, Szabo A, Thompson M, Vainio R, Velli M, Vennerstrom S, Walsh R, Wimmer-Schweingruber R, Zank Get al., 2006, A magnetometer for the Solar Orbiter Mission, ISSN: 0379-6566

The magnetometer is a key instrument to the Solar Orbiter mission. The magnetic field is a fundamental parameter in any plasma: a precise and accurate measurement of the field is essential for understanding almost all aspects of plasma dynamics such as shocks and stream-stream interactions. Many of Solar Orbiter's mission goals are focussed around the links between the Sun and space. A combination of in situ measurements by the magnetometer, remote measurements of solar magnetic fields and global modelling is required to determine this link and hence how the Sun affects interplanetary space. The magnetic field is typically one of the most precisely measured plasma parameters and is therefore the most commonly used measurement for studies of waves, turbulence and other small scale phenomena. It is also related to the coronal magnetic field which cannot be measured directly. Accurate knowledge of the magnetic field is essential for the calculation of fundamental plasma parameters such as the plasma beta, Alfven speed and gyroperiod. We describe here the objectives and context of magnetic field measurements on Solar Orbiter and an instrument that fulfils those objectives as defined by the scientific requirements for the mission.

• Abstract
• Cite

Baker DN, Klecker B, Schwartz SJ, Schwenn R, von Steiger Ret al., 2006, Foreword, ßr, Vol: 124, Pages: D7+-D7+

• Cite

Schwartz SJ, 2006, Shocks: Commonalities in Solar-Terrestrial Chains, ßr, Vol: 124, Pages: 333-344-333-344

• Cite

Schwartz SJ, Sibeck D, Wilber M, Meziane K, Horbury TSet al., 2006, Kinetic aspects of foreshock cavities, \grl, Vol: 33, Pages: L12103-L12103

• Cite

Lavraud B, Thomsen MF, Lefebvre B, Schwartz SJ, Seki K, Phan TD, Wang YL, Fazakerley A, Rème H, Balogh Aet al., 2006, Evidence for newly closed magnetosheath field lines at the dayside magnetopause under northward IMF, Journal of Geophysical Research (Space Physics), Vol: 111, Pages: A05211-A05211

• Cite

Horbury T, Louarn P, Fujimoto M, Baumjohann W, Blomberg LG, Barabash S, Canu P, Glassmeier KH, Koskinen H, Nakamura R, Owen C, Pulkkinen T, Roux A, Sauvaud J-A, Schwartz SJ, Svenes K, Vaivads Aet al., 2006, Cross-Scale: a multi-spacecraft mission to study cross-scale coupling in space plasmas

• Cite

Masood W, Schwartz SJ, Maksimovic M, Fazakerley ANet al., 2006, Electron velocity distribution and lion roars in the magnetosheath, ANNALES GEOPHYSICAE, Vol: 24, Pages: 1725-1735, ISSN: 0992-7689

• Author Web Link
• Cite
• Citations: 69

Longmore M, Schwartz SJ, Lucek EA, 2006, Rotation of the magnetic field in Earth's magnetosheath by bulk magnetosheath plasma flow, ANNALES GEOPHYSICAE, Vol: 24, Pages: 339-354, ISSN: 0992-7689

• Author Web Link
• Cite
• Citations: 14

Lobzin VV, Krasnoselskikh VV, Schwartz SJ, Cairns I, Lefebvre B, Décréau P, Fazakerley Aet al., 2005, Generation of downshifted oscillations in the electron foreshock: A loss-cone instability, \grl, Vol: 32, Pages: L18101-L18101

• Cite