Professor Jonathan P. Eastwood

Sibeck DG, Angelopoulos V, Brain DA, Delory GT, Eastwood JP, Farrell WM, Grimm RE, Halekas JS, Hasegawa H, Hellinger P, Khurana KK, Lillis RJ, Øieroset M, Phan TD, Raeder J, Russell CT, Schriver D, Slavin JA, Travnicek PM, Weygand JMet al., 2013, ARTEMIS science objectives, The ARTEMIS Mission, Pages: 27-59, ISBN: 9781461495536

NASA's two spacecraft ARTEMIS mission will address both heliospheric and planetary research questions, first while in orbit about the Earth with the Moon and subsequently while in orbit about the Moon. Heliospheric topics include the structure of the Earth's magnetotail; reconnection, particle acceleration, and turbulence in the Earth's magnetosphere, at the bow shock, and in the solar wind; and the formation and structure of the lunar wake. Planetary topics include the lunar exosphere and its relationship to the composition of the lunar surface, the effects of electric fields on dust in the exosphere, internal structure of the Moon, and the lunar crustal magnetic field. This paper describes the expected contributions of ARTEMIS to these baseline scientific objectives.

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• Citations: 3

Phan TD, Shay MA, Gosling JT, Fujimoto M, Drake JF, Paschmann G, Oieroset M, Eastwood JP, Angelopoulos Vet al., 2013, Electron bulk heating in magnetic reconnection at Earth's magnetopause: Dependence on the inflow Alfven speed and magnetic shear, GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 4475-4480, ISSN: 0094-8276

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• Citations: 90

Carr J, Cassak PA, Galante M, Keesee AM, Lusk G, Magee RM, McCarren D, Scime EE, Sears S, Vandervort R, Gulbrandsen N, Goldman M, Newman D, Eastwood JPet al., 2013, Spontaneous ion beam formation in the laboratory, space, and simulation, PHYSICS OF PLASMAS, Vol: 20, ISSN: 1070-664X

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• Citations: 15

Eastwood JP, Phan TD, Drake JF, Shay MA, Borg AL, Lavraud B, Taylor MGGTet al., 2013, Energy Partition in Magnetic Reconnection in Earth's Magnetotail, PHYSICAL REVIEW LETTERS, Vol: 110, ISSN: 0031-9007

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• Citations: 67

Zhong J, Pu ZY, Dunlop MW, Bogdanova YV, Wang XG, Xiao CJ, Guo RL, Hasegawa H, Raeder J, Zhou XZ, Angelopoulos V, Zong QG, Fu SY, Xie L, Taylor MGGT, Shen C, Berchem J, Zhang QH, Volwerk M, Eastwood JPet al., 2013, Three-dimensional magnetic flux rope structure formed by multiple sequential X-line reconnection at the magnetopause, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 1904-1911, ISSN: 2169-9380

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• Citations: 40

Archer MO, Horbury TS, Eastwood JP, Weygand JM, Yeoman TKet al., 2013, Magnetospheric response to magnetosheath pressure pulses: A low pass filter effect, Journal of Geophysical Research, Vol: 118, Pages: 5454-5466

Abstract. We present observations from the magnetopause to the ground during periods of large amplitude, transient dynamic pressure pulses in the magnetosheath. While individual magnetosheath pulses are sharp and impulsive, the magnetospheric response is much smoother with frequencies in the Pc5-6 range being excited in the compressional and poloidal components of the magnetic field. We show that the magnetopause acts like a low pass filter, suppressing timescales shorter than a few minutes. Further filtering appears to occur locally within the magnetosphere, which may be due to the unusual field line resonance frequency profile on this day. Ground magnetometer and radar data along with equivalent ionospheric currents show signatures of travelling convection vortices, similar to the response from pressure variations of solar wind origin. However, the signatures are associated with groups of magnetosheath pulses rather than individual ones due to the impulsive nature of the pressure variations. Thus the scale-dependent magnetospheric response to these transient pressure variations, results in coherent signatures on longer timescales than any individual pulse.

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Moestl C, Farrugia CJ, Kilpua EKJ, Jian LK, Liu Y, Eastwood JP, Harrison RA, Webb DF, Temmer M, Odstrcil D, Davies JA, Rollett T, Luhmann JG, Nitta N, Mulligan T, Jensen EA, Forsyth R, Lavraud B, de Koning CA, Veronig AM, Galvin AB, Zhang TL, Anderson BJet al., 2012, MULTI-POINT SHOCK AND FLUX ROPE ANALYSIS OF MULTIPLE INTERPLANETARY CORONAL MASS EJECTIONS AROUND 2010 AUGUST 1 IN THE INNER HELIOSPHERE, ASTROPHYSICAL JOURNAL, Vol: 758, ISSN: 0004-637X

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• Citations: 93

Eastwood JP, Phan TD, Fear RC, Sibeck DG, Angelopoulos V, Oieroset M, Shay MAet al., 2012, Survival of flux transfer event (FTE) flux ropes far along the tail magnetopause, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380

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• Citations: 37

Archer MO, Horbury TS, Eastwood JP, 2012, Magnetosheath pressure pulses: Generation downstream of the bow shock from solar wind discontinuities, Journal of Geophyical Research, Vol: 117, ISSN: 0148-0227

We present multipoint Time History of Events and Macroscale Interactions duringSubstorms (THEMIS) observations of transient dynamic pressure pulses in themagnetosheath 3–10 times the background in amplitude, due to enhancements in both theion density and velocity. Their spatial dimensions are of the order of 1 RE parallel tothe flow and 0.2–0.5 RE perpendicular to it, inferred from the difference in theamplitudes observed by the different spacecraft. For the first time, simultaneousobservations of the solar wind and foreshock are also shown, proving no similar dynamicpressure enhancements exist upstream of the bow shock and that the majority of pulsesare downstream of the quasi-parallel shock. By considering previously suggestedmechanisms for their generation, we show that the pressure pulses cannot be caused byreconnection, hot flow anomalies, or short, large-amplitude magnetic structures andthat at least some of the pressure pulses appear to be consistent with previoussimulations of solar wind discontinuities interacting with the bow shock. Thesesimulations predict large-amplitude pulses when the local geometry of the shock changesfrom quasi-perpendicular to quasi-parallel, while the opposite case should also producenotable pulses but typically of lower amplitude. Therefore, in a given region of themagnetosheath, some of the discontinuities in the solar wind should generate pressurepulses, whereas others are expected not to. There is also evidence that the pulses canimpinge upon the magnetopause, causing its motion.

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Harrison RA, Davies JA, Moestl C, Liu Y, Temmer M, Bisi MM, Eastwood JP, de Koning CA, Nitta N, Rollett T, Farrugia CJ, Forsyth RJ, Jackson BV, Jensen EA, Kilpua EKJ, Odstrcil D, Webb DFet al., 2012, AN ANALYSIS OF THE ORIGIN AND PROPAGATION OF THE MULTIPLE CORONAL MASS EJECTIONS OF 2010 AUGUST 1, ASTROPHYSICAL JOURNAL, Vol: 750, ISSN: 0004-637X

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• Citations: 76

Masters A, Eastwood JP, Swisdak M, Thomsen MF, Russell CT, Sergis N, Crary FJ, Dougherty MK, Coates AJ, Krimigis SMet al., 2012, The importance of plasma β conditions for magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276

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• Citations: 96

Temmer M, Vrsnak B, Rollett T, Bein B, de Koning CA, Liu Y, Bosman E, Davies JA, Moestl C, Zic T, Veronig AM, Bothmer V, Harrison R, Nitta N, Bisi M, Flor O, Eastwood J, Odstrcil D, Forsyth Ret al., 2012, CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT, ASTROPHYSICAL JOURNAL, Vol: 749, ISSN: 0004-637X

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• Citations: 114

Branduardi-Raymont G, Sembay SF, Eastwood JP, Sibeck DG, Abbey TA, Brown P, Carter JA, Carr CM, Forsyth C, Kataria D, Kemble S, Milan SE, Owen CJ, Peacocke L, Read AM, Coates AJ, Collier MR, Cowley SWH, Fazakerley AN, Fraser GW, Jones GH, Lallement R, Lester M, Porter FS, Yeoman TKet al., 2012, AXIOM: advanced X-ray imaging of the magnetosphere, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 403-443, ISSN: 0922-6435

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• Citations: 25

Owen CJ, Amm O, Bruno R, De Keyser J, Dunlop MW, Eastwood JP, Fazakerley AN, Fontaine D, Forsyth C, Hasegawa H, Hellinger P, Hercik D, Jacquey C, Milan S, Raeder J, Sibeck DG, Stverak S, Travnicek P, Walsh AP, Wild JAet al., 2012, IMPALAS: Investigation of MagnetoPause Activity using Longitudinally-Aligned Satellites-a mission concept proposed for the ESA M3 2020/2022 launch, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 365-401, ISSN: 0922-6435

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Sembay S, Branduardi-Raymont G, Eastwood JP, Sibeck DG, Abbey A, Brown P, Carter JA, Carr CM, Forsyth C, Kataria D, Kemble S, Milan S, Owen CJ, Read AM, Peacocke L, Arridge CS, Coates AJ, Collier MR, Cowley SWH, Fazakerley AN, Fraser G, Jones GH, Lallement R, Lester M, Porter FS, Yeoman Tet al., 2012, AXIOM: Advanced X-ray imaging of the magnetosheath, ASTRONOMISCHE NACHRICHTEN, Vol: 333, Pages: 388-392, ISSN: 0004-6337

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• Citations: 2

Eastwood JP, Videira JJH, Brain DA, Halekas JSet al., 2012, A chain of magnetic flux ropes in the magnetotail of Mars, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276

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• Citations: 23

Borg AL, Taylor MGGT, Eastwood JP, 2012, Electron pitch angle distribution during magnetic reconnection diffusion region observations in the Earth's magnetotail, ANNALES GEOPHYSICAE, Vol: 30, Pages: 109-117, ISSN: 0992-7689

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• Citations: 5

Taylor MGGT, Hasegawa H, Lavraud B, Phan T, Escoubet CP, Dunlop MW, Bogdanova YV, Borg AL, Volwerk M, Berchem J, Constantinescu OD, Eastwood JP, Masson A, Laakso H, Soucek J, Fazakerley AN, Frey HU, Panov EV, Shen C, Shi JK, Sibeck DG, Pu ZY, Wang J, Wild JAet al., 2012, Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause, ANNALES GEOPHYSICAE, Vol: 30, Pages: 1025-1035, ISSN: 0992-7689

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• Citations: 57

Borg AL, Taylor MGGT, Eastwood JP, 2012, Observations of magnetic flux ropes during magnetic reconnection in the Earth's magnetotail, ANNALES GEOPHYSICAE, Vol: 30, Pages: 761-773, ISSN: 0992-7689

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• Citations: 44

Sibeck DG, Angelopoulos V, Brain DA, Delory GT, Eastwood JP, Farrell WM, Grimm RE, Halekas JS, Hasegawa H, Hellinger P, Khurana KK, Lillis RJ, Oieroset M, Phan T-D, Raeder J, Russell CT, Schriver D, Slavin JA, Travnicek PM, Weygand JMet al., 2011, ARTEMIS Science Objectives, SPACE SCIENCE REVIEWS, Vol: 165, Pages: 59-91, ISSN: 0038-6308

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• Citations: 45

Teh W-L, Nakamura R, Sonnerup BUO, Eastwood JP, Volwerk M, Fazakerley AN, Baumjohann Wet al., 2011, Evidence of the origin of the Hall magnetic field for reconnection: Hall MHD reconstruction results from Cluster observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380

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• Citations: 18

Oka M, Phan T-D, Eastwood JP, Angelopoulos V, Murphy NA, Oieroset M, Miyashita Y, Fujimoto M, McFadden J, Larson Det al., 2011, Magnetic reconnection X-line retreat associated with dipolarization of the Earth's magnetosphere, GEOPHYSICAL RESEARCH LETTERS, Vol: 38, ISSN: 0094-8276

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• Citations: 27

Oieroset M, Phan TD, Eastwood JP, Fujimoto M, Daughton W, Shay MA, Angelopoulos V, Mozer FS, McFadden JP, Larson DE, Glassmeier K-Het al., 2011, Direct Evidence for a Three-Dimensional Magnetic Flux Rope Flanked by Two Active Magnetic Reconnection <i>X</i> Lines at Earth's Magnetopause, PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007

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• Citations: 73

Briggs JA, Brain DA, Cartwright ML, Eastwood JP, Halekas JSet al., 2011, A statistical study of flux ropes in the Martian magnetosphere, PLANETARY AND SPACE SCIENCE, Vol: 59, Pages: 1498-1505, ISSN: 0032-0633

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• Citations: 39

Phan TD, Love TE, Gosling JT, Paschmann G, Eastwood JP, Oieroset M, Angelopoulos V, McFadden JP, Larson D, Auster Uet al., 2011, Triggering of magnetic reconnection in a magnetosheath current sheet due to compression against the magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 38, ISSN: 0094-8276

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• Citations: 28

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

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• Citations: 37

Shay MA, Drake JF, Eastwood JP, Phan TDet al., 2011, Erratum: Super-alfvénic propagation of substorm reconnection signatures and poynting flux (Physical Review Letters (2011) 107 (065001)), Physical Review Letters, Vol: 107, ISSN: 0031-9007

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• Citations: 3

Shay MA, Drake JF, Eastwood JP, Phan TDet al., 2011, Super-Alfvelnic Propagation of Substorm Reconnection Signatures and Poynting Flux, PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007

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• Citations: 65

Lavraud B, Foullon C, Farrugia CJ, Eastwood JPet al., 2011, The Magnetopause, Its Boundary Layers and Pathways to the Magnetotail, The Dynamic Magnetosphere, Editors: Liu, Fujimoto, Publisher: Springer Verlag, Pages: 3-28, ISBN: 9789400705005

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Halekas JS, Brain DA, Eastwood JP, 2011, Large-amplitude compressive "sawtooth" magnetic field oscillations in the Martian magnetosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380

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• Citations: 22