176 results found
Genestreti KJ, Fuselier SA, Goldstein J, et al., 2014, The location and rate of occurrence of near-Earth magnetotail reconnection as observed by Cluster and Geotail, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, Vol: 121, Pages: 98-109, ISSN: 1364-6826
Phan TD, Drake JF, Shay MA, et al., 2014, Ion bulk heating in magnetic reconnection exhausts at Earth's magnetopause: Dependence on the inflow Alfven speed and magnetic shear angle, GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 7002-7010, ISSN: 0094-8276
Archer MO, Turner DL, Eastwood JP, et al., 2014, The role of pressure gradients in driving sunward magnetosheath flows and magnetopause motion, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 8117-8125, ISSN: 2169-9380
Oieroset M, Sundkvist D, Chaston CC, et al., 2014, Observations of plasma waves in the colliding jet region of amagnetic flux rope flanked by two active X lines at the subsolar magnetopause, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, ISSN: 2169-9380
Jackman CM, Slavin JA, Kivelson MG, et al., 2014, Saturn's dynamic magnetotail: A comprehensive magnetic field and plasma survey of plasmoids and traveling compression regions and their role in global magnetospheric dynamics, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 5465-5494, ISSN: 2169-9380
Selzer LA, Hnat B, Osman KT, et al., 2014, TEMPERATURE ANISOTROPY IN THE PRESENCE OF ULTRA LOW FREQUENCY WAVES IN THE TERRESTRIAL FORESHOCK, ASTROPHYSICAL JOURNAL LETTERS, Vol: 788, ISSN: 2041-8205
Hietala H, Eastwood JP, Isavnin A, 2014, Sequentially released tilted flux ropes in the Earth's magnetotail, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 56, ISSN: 0741-3335
Goldman MV, Newman DL, Lapenta G, et al., 2014, Cerenkov Emission of Quasiparallel Whistlers by Fast Electron Phase-Space Holes during Magnetic Reconnection, PHYSICAL REVIEW LETTERS, Vol: 112, ISSN: 0031-9007
Eastwood JP, Phan TD, Oieroset M, et al., 2013, Influence of asymmetries and guide fields on the magnetic reconnection diffusion region in collisionless space plasmas, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 55, ISSN: 0741-3335
© Springer Science+Business Media New York 2014. All rights are reserved. 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.
Phan TD, Shay MA, Gosling JT, et 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
Carr J, Cassak PA, Galante M, et al., 2013, Spontaneous ion beam formation in the laboratory, space, and simulation, PHYSICS OF PLASMAS, Vol: 20, ISSN: 1070-664X
Eastwood JP, Phan TD, Drake JF, et al., 2013, Energy Partition in Magnetic Reconnection in Earth's Magnetotail, PHYSICAL REVIEW LETTERS, Vol: 110, ISSN: 0031-9007
Zhong J, Pu ZY, Dunlop MW, et 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
Archer MO, Horbury TS, Eastwood JP, et 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.
Moestl C, Farrugia CJ, Kilpua EKJ, et 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
Eastwood JP, Phan TD, Fear RC, et 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
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.
Harrison RA, Davies JA, Moestl C, et 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
Masters A, Eastwood JP, Swisdak M, et al., 2012, The importance of plasma beta conditions for magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
Temmer M, Vrsnak B, Rollett T, et 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
Sembay S, Branduardi-Raymont G, Eastwood JP, et al., 2012, AXIOM: Advanced X-ray imaging of the magnetosheath, ASTRONOMISCHE NACHRICHTEN, Vol: 333, Pages: 388-392, ISSN: 0004-6337
Branduardi-Raymont G, Sembay SF, Eastwood JP, et al., 2012, AXIOM: advanced X-ray imaging of the magnetosphere, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 403-443, ISSN: 0922-6435
Owen CJ, Amm O, Bruno R, et 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
Eastwood JP, Videira JJH, Brain DA, et al., 2012, A chain of magnetic flux ropes in the magnetotail of Mars, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
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
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
Taylor MGGT, Hasegawa H, Lavraud B, et 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
Teh W-L, Nakamura R, Sonnerup BUO, et 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: 0148-0227
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