Imperial College London

ProfessorTimothyHorbury

Faculty of Natural SciencesDepartment of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 7676t.horbury Website

 
 
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Location

 

6M65Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

276 results found

Kellogg PJ, Horbury TS, 2005, Rapid density fluctuations in the solar wind, ANNALES GEOPHYSICAE, Vol: 23, Pages: 3765-3773, ISSN: 0992-7689

Journal article

Scholer M, Thomsen MF, Burgess D, Bale SD, Balikhin MA, Balogh A, Horbury TS, Krasnoselskikh VV, Kucharek H, Lucek EA, Lembege B, Moebius E, Schwartz SJ, Walker SNet al., 2005, Cluster at the Earth's bow shock: Status and outlook, Outer magnetospheric boundaries: cluster results. Space Science Series, Editors: Paschmann, Schwartz, Escoubet, Haaland, Paschmann, Schwartz, Escoubet, Haaland, Paschmann, Schwartz, Escoubet, Haaland, Paschmann, Schwartz, Escoubet, Haaland, Berlin, Publisher: Springer, ISBN: 9781402034886

Book chapter

Balogh A, Schwartz SJ, Bale SD, Balikhin MA, Burgess D, Horbury TS, Krasnoselskikh VV, Kucharek H, Lembege B, Moebius E, Scholer M, Thomsen MF, Walken SNet al., 2005, Cluster at the Earth's bow shock: introduction, Outer magnetospheric boundaries: cluster results. Space Science Series, Editors: Paschmann, Schwartz, Escoubet, Haaland, Paschmann, Schwartz, Escoubet, Haaland, Paschmann, Schwartz, Escoubet, Haaland, Berlin, Publisher: Springer, ISBN: 9781402034886

Book chapter

Owen CJ, Fazakerley AN, Schwartz SJ, Horbury TS, Baumjohann W, Nakamura R, Louarn P, Sauvaud A, Vaivads A, Roux A, Lecontel Oet al., 2005, Multi point, multi scale investigations of fundamental plasma processes in the Earth's magnetosphere, Noordwijk, 39th ESLAB Symposium, Publisher: ESLAB

Conference paper

Archer M, Horbury TS, Lucek EA, Mazelle C, Balogh A, Dandouras Iet al., 2005, Size and shape of ULF waves in the terrestrial foreshock, J. Geophys. Res., Vol: 110, Pages: A05208-A05208

Journal article

Horbury TS, Lucek EA, Balogh A, Dandouras I, Rème Het al., 2004, Motion and orientation of magnetic field dips and peaks in the terrestrial magnetosheath -: art. no. A09209, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 109, ISSN: 2169-9380

Journal article

Lucek EA, Horbury TS, Balogh A, Dandouras I, Rème Het al., 2004, Cluster observations of hot flow anomalies -: art. no. A06207, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 109, ISSN: 2169-9380

Journal article

Knetter T, Neubauer FM, Horbury T, Balogh Aet al., 2004, Four-point discontinuity observations using Cluster magnetic field data: A statistical survey, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 109, ISSN: 2169-9380

Journal article

Kucharek H, Möbius E, Scholer M, Mouikis C, Kistler LM, Horbury T, Balogh A, Réme H, Bosqued JMet al., 2004, On the origin of field-aligned beams at the quasi-perpendicular bow shock:: multi-spacecraft observations by Cluster, Meeting on Spatio-Temporal Analysis and Multipoint Measurements in Space, Publisher: COPERNICUS GESELLSCHAFT MBH, Pages: 2301-2308, ISSN: 0992-7689

Conference paper

Lucek EA, Horbury TS, Balogh A, Dandouras I, Rème Het al., 2004, Cluster observations of structures at quasi-parallel bow shocks, Meeting on Spatio-Temporal Analysis and Multipoint Measurements in Space, Publisher: EUROPEAN GEOSCIENCES UNION, Pages: 2309-2313, ISSN: 0992-7689

Conference paper

Walker SN, Alleyne HSCK, Balikhin MA, André M, Horbury TSet al., 2004, Electric field scales at quasi-perpendicular shocks, Meeting on Spatio-Temporal Analysis and Multipoint Measurements in Space, Publisher: COPERNICUS GESELLSCHAFT MBH, Pages: 2291-2300, ISSN: 0992-7689

Conference paper

Nykyri K, Cargill PJ, Lucek E, Horbury T, Lavraud B, Balogh A, Dunlop MW, Bogdanova Y, Fazakerley A, Dandouras I, Rème Het al., 2004, Cluster observations of magnetic field fluctuations in the high-altitude cusp, Meeting on Spatio-Temporal Analysis and Multipoint Measurements in Space, Publisher: COPERNICUS GESELLSCHAFT MBH, Pages: 2413-2429, ISSN: 0992-7689

Conference paper

Bale SD, Mozer FS, Horbury TS, 2003, Density-transition scale at quasiperpendicular collisionless shocks, PHYSICAL REVIEW LETTERS, Vol: 91, ISSN: 0031-9007

Journal article

Nykyri K, Cargill PJ, Lucek EA, Horbury TS, Balogh A, Lavraud B, Dandouras I, Rème Het al., 2003, Ion cyclotron waves in the high altitude cusp:: CLUSTER observations at varying spacecraft separations -: art. no. 2263, GEOPHYSICAL RESEARCH LETTERS, Vol: 30, ISSN: 0094-8276

Journal article

Vörös Z, Baumjohann W, Nakamura R, Runov A, Zhang TL, Volwerk M, Eichelberger HU, Balogh A, Horbury TS, Glassmeier KH, Klecker B, Rème Het al., 2003, Multi-scale magnetic field intermittence in the plasma sheet, ANNALES GEOPHYSICAE, Vol: 21, Pages: 1955-1964, ISSN: 0992-7689

Journal article

Maksimovic M, Bale SD, Horbury TS, André Met al., 2003, Bow shock motions observed with CLUSTER -: art. no. 1393, GEOPHYSICAL RESEARCH LETTERS, Vol: 30, ISSN: 0094-8276

Journal article

Bale SD, Mozer FS, Horbury TS, 2003, Density-transition scale at quasiperpendicular collisionless shocks, Physical Review Letters, Vol: 91, ISSN: 0031-9007

Measurements of a spacecraft floating potential, on the four Cluster spacecraft, are used as a proxy for electron plasma density to study, for the first time, the macroscopic density transition scale at 98 crossings of the quasiperpendicular terrestrial bow shock. A timing analysis gives shock speeds and normals; the shock speed is used to convert the temporal measurement to a spatial one. A hyperbolic tangent function is fitted to each density transition, which captures the main shock transition, but not overshoot or undershoot nor foot features. We find that, at a low Mach number [Formula presented], the density transition is consistent with both ion inertial scales [Formula presented] and convected gyroradii [Formula presented], while at [Formula presented] only the convected gyroradius is the preferred scale for the shock density transition and takes the value [Formula presented]. © 2003 The American Physical Society.

Journal article

Vörös Z, Baumjohann W, Nakamura R, Runov A, Zhang TL, Volwerk M, Eichelberger HU, Balogh A, Horbury TS, Glaßmeier KH, Klecker B, Rème Het al., 2003, Multi-scale magnetic field intermittence in the plasma sheet, Annales Geophysicae, Vol: 21, Pages: 1955-1964, ISSN: 0992-7689

This paper demonstrates that intermittent magnetic field fluctuations in the plasma sheet exhibit transitory, localized, and multi-scale features. We propose a multifractal-based algorithm, which quantifies intermittence on the basis of the statistical distribution of the "strength of burstiness", estimated within a sliding window. Interesting multi-scale phenomena observed by the Cluster spacecraft include large-scale motion of the current sheet and bursty bulk flow associated turbulence, interpreted as a cross-scale coupling (CSC) process.

Journal article

Fränz M, Horbury TS, Génot V, Moullard O, Rème H, Dandouras I, Fazakerley AN, Korth A, Frutos-Alfaro Fet al., 2003, Solitary waves observed by cluster in the solar wind, 10th International Solar Wind Conference, Publisher: AMER INST PHYSICS, Pages: 562-565, ISSN: 0094-243X

Conference paper

Knetter T, Neubauer FM, Horbury T, Balogh Aet al., 2003, Discontinuity observations with cluster, D1 1/D2 1/E3 1 Symposium of COSPAR Scientific Commission D held at the 34th COSPAR Scientific Assembly/2nd Space Congress, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 543-548, ISSN: 0273-1177

Conference paper

Eastwood JP, Balogh A, Dunlop MW, Horbury TS, Dandouras Iet al., 2002, Cluster observations of fast magnetosonic waves in the terrestrial foreshock, GEOPHYSICAL RESEARCH LETTERS, Vol: 29, ISSN: 0094-8276

Journal article

Lucek EA, Horbury TS, Dunlop MW, Cargill PJ, Schwartz SI, Balogh A, Brown P, Carr C, Fornacon KH, Georgescu Eet al., 2002, Cluster magnetic field observations at a quasi-parallel bow shock, ANNALES GEOPHYSICAE, Vol: 20, Pages: 1699-1710, ISSN: 0992-7689

Journal article

Horbury TS, Cargill PJ, Lucek EA, Eastwood J, Balogh A, Dunlop MW, Fornacon KH, Georgescu Eet al., 2002, Four spacecraft measurements of the quasiperpendicular terrestrial bow shock: Orientation and motion, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 107, ISSN: 2169-9380

Journal article

Horbury TS, Balogh A, Dunlop DW, Cargill PJ, Lucek EA, Oddy T, Brown P, Carr C, Fornacon KH, Georgescu Eet al., 2002, Cluster magnetic field observations of magnetospheric boundaries, Earth's low-latitude boundary layer, Editors: Newell, Onsager, Newell, Onsager, Newell, Onsager, Newell, Onsager, Newell, Onsager, Washington D.C., Publisher: American Geophysical Union, ISBN: 9780875909929

Book chapter

Horbury TS, Burgess D, Fränz M, Owen CJet al., 2001, Prediction of Earth arrival times of interplanetary southward magnetic field turnings, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 106, Pages: 30001-30009, ISSN: 2169-9380

Journal article

Möbius E, Kucharek H, Mouikis C, Georgescu E, Kistler LM, Popecki MA, Scholer M, Bosqued JM, Rème H, Carlson CW, Klecker B, Korth A, Parks GK, Sauvaud JC, Balsiger H, Bavassano-Cattaneo MB, Dandouras I, DiLellis AM, Eliasson L, Formisano V, Horbury T, Lennartsson W, Lundin R, McCarthy M, McFadden JP, Paschmann Get al., 2001, Observations of the spatial and temporal structure of field-aligned beam and gyrating ring distributions at the quasi-perpendicular bow shock with Cluster CIS, Annales Geophysicae, Vol: 19, Pages: 1411-1420, ISSN: 0992-7689

During the early orbit phase, the Cluster spacecraft have repeatedly crossed the perpendicular Earth's bow shock and provided the first multi-spacecraft measurements. We have analyzed data from the Cluster Ion Spectrometry experiment (CIS), which observes the 3D-ion distribution function of the major species in the energy range of 5 eV to 40 keV with a 4 s resolution. Beams of reflected ions were observed simultaneously at all spacecraft locations and could be tracked from upstream to the shock itself. They were found to originate from the same distribution of ions that constitutes the reflected gyrating ions, which form a ring distribution in the velocity space immediately upstream and downstream of the shock. This observation suggests a common origin of ring and beam populations at quasi-perpendicular shocks in the form of specular reflection and immediate pitch angle scattering. Generally, the spatial evolution across the shock is very similar on all spacecraft, but phased in time according to their relative location. However, a distinct temporal structure of the ion fluxes in the field-aligned beam is observed that varies simultaneously on all spacecraft. This is likely to reflect the variations in the reflection and scattering efficiencies. © European Geophysical Society 2001.

Journal article

Lucek EA, Dunlop MW, Horbury TS, Balogh A, Brown P, Cargill P, Carr C, Fornacon KH, Georgescu E, Oddy Tet al., 2001, Cluster magnetic field observations in the magnetosheath: four-point measurements of mirror structures, ANNALES GEOPHYSICAE, Vol: 19, Pages: 1421-1428, ISSN: 0992-7689

Journal article

Horbury TS, Cargill PJ, Lucek EA, Balogh A, Dunlop MW, Oddy TM, Carr C, Brown P, Szabo A, Fornaçon KHet al., 2001, Cluster magnetic field observations of the bowshock:: Orientation, motion and structure, ANNALES GEOPHYSICAE, Vol: 19, Pages: 1399-1409, ISSN: 0992-7689

Journal article

Horbury TS, Balogh A, 2001, Evolution of magnetic field fluctuations in high-speed solar wind streams: Ulysses and Helios observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 106, Pages: 15929-15940, ISSN: 2169-9380

Journal article

Intriligator DS, Jokipii JR, Horbury TS, Intriligator JM, Forsyth RJ, Kunow H, Wibberenz G, Gosling JTet al., 2001, Processes associated with particle transport in corotating interaction regions and near stream interfaces, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 106, Pages: 10625-10634, ISSN: 2169-9380

Journal article

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