Imperial College London
Alternate

DrAdamMasters

Faculty of Natural Sciences, Department of Physics

Senior Lecturer
 
 
 
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a.masters

 
 
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Location

 

6M69Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

111 results found

Campagnola S, Boutonnet A, Martens W, Masters Aet al., 2015, Mission design for the exploration of Neptune and Triton, IEEE Aerospace and Electronic Systems Magazine, Vol: 30, Pages: 6-17, ISSN: 0885-8985

Journal article

Masters A, 2015, The dayside reconnection voltage applied to Saturn's magnetosphere, GEOPHYSICAL RESEARCH LETTERS, Vol: 42, Pages: 2577-2585, ISSN: 0094-8276

Journal article

Delamere PA, Bagenal F, Paranicas C, Masters A, Radioti A, Bonfond B, Ray L, Jia X, Nichols J, Arridge Cet al., 2015, Solar Wind and Internally Driven Dynamics: Influences on Magnetodiscs and Auroral Responses, SPACE SCIENCE REVIEWS, Vol: 187, Pages: 51-97, ISSN: 0038-6308

Journal article

Pisa D, Hospodarsky GB, Kurth WS, Santolik O, Soucek J, Gurnett DA, Masters A, Hill MEet al., 2015, Statistics of Langmuir wave amplitudes observed inside Saturn's foreshock by the Cassini spacecraft, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 120, Pages: 2531-2542, ISSN: 2169-9380

Journal article

Kimura T, Badman SV, Tao C, Yoshioka K, Murakami G, Yamazaki A, Tsuchiya F, Bonfond B, Steffl AJ, Masters A, Kasahara S, Hasegawa H, Yoshikawa I, Fujimoto M, Clarke JTet al., 2015, Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble Space Telescope, GEOPHYSICAL RESEARCH LETTERS, Vol: 42, Pages: 1662-1668, ISSN: 0094-8276

Journal article

Masters A, 2015, Magnetic reconnection at Neptune's magnetopause, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 120, Pages: 479-493, ISSN: 2169-9380

Journal article

Arridge CS, Achilleos N, Agarwal J, Agnor CB, Ambrosi R, Andre N, Badman SV, Baines K, Banfield D, Barthelemy M, Bisi MM, Blum J, Bocanegra-Bahamon T, Bonfond B, Bracken C, Brandt P, Briand C, Briois C, Brooks S, Castillo-Rogez J, Cavalie T, Christophe B, Coates AJ, Collinson G, Cooper JF, Costa-Sitja M, Courtin R, Daglis IA, De Pater I, Desai M, Dirkx D, Dougherty MK, Ebert RW, Filacchione G, Fletcher LN, Fortney J, Gerth I, Grassi D, Grodent D, Grun E, Gustin J, Hedman M, Helled R, Henri P, Hess S, Hillier JK, Hofstadter MH, Holme R, Horanyi M, Hospodarsky G, Hsu S, Irwin P, Jackman CM, Karatekin O, Kempf S, Khalisi E, Konstantinidis K, Kruger H, Kurth WS, Labrianidis C, Lainey V, Lamy LL, Laneuville M, Lucchesi D, Luntzer A, MacArthur J, Maier A, Masters A, McKenna-Lawlor S, Melin H, Milillo A, Moragas-Klostermeyer G, Morschhauser A, Moses JI, Mousis O, Nettelmann N, Neubauer FM, Nordheim T, Noyelles B, Orton GS, Owens M, Peron R, Plainaki C, Postberg F, Rambaux N, Retherford K, Reynaud S, Roussos E, Russell CT, Rymer A, Sallantin R, Sanchez-Lavega A, Santolik O, Saur J, Sayanagi K, Schenk P, Schubert J, Sergis N, Sittler EC, Smith A, Spahn F, Srama R, Stallard T, Sterken V, Sternovsky Z, Tiscareno M, Tobie G, Tosi F, Trieloff M, Turrini D, Turtle EP, Vinatier S, Wilson R, Zarkat Pet al., 2014, The science case for an orbital mission to Uranus: Exploring the origins and evolution of ice giant planets, PLANETARY AND SPACE SCIENCE, Vol: 104, Pages: 122-140, ISSN: 0032-0633

Journal article

Masters A, Achilleos N, Agnor CB, Campagnola S, Charnoz S, Christophe B, Coates AJ, Fletcher LN, Jones GH, Lamy L, Marzari F, Nettelmann N, Ruiz J, Ambrosi R, Andre N, Bhardwaj A, Fortney J, Hansen CJ, Helled R, Moragas-Klostermeyer G, Orton G, Ray L, Reynaud S, Sergis N, Srama R, Volwerk Met al., 2014, Neptune and Triton: Essential pieces of the Solar System puzzle, PLANETARY AND SPACE SCIENCE, Vol: 104, Pages: 108-121, ISSN: 0032-0633

Journal article

Slavin JA, DiBraccio GA, Gershman DJ, Imber SM, Poh GK, Raines JM, Zurbuchen TH, Jia X, Baker DN, Glassmeier K-H, Livi SA, Boardsen SA, Cassidy TA, Sarantos M, Sundberg T, Masters A, Johnson CL, Winslow RM, Anderson BJ, Korth H, McNutt RL, Solomon SCet al., 2014, MESSENGER observations of Mercury's dayside magnetosphere under extreme solar wind conditions, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 8087-8116, ISSN: 2169-9380

Journal article

Masters A, 2014, Magnetic reconnection at Uranus' magnetopause, Journal of Geophysical Research: Space Physics, Vol: 119, Pages: 5520-5538, ISSN: 2169-9380

The magnetosphere of Uranus has barely been explored by spacecraft but is distinct from other solar system magnetospheres in many respects. Determining how this magnetosphere is coupled to the solar wind is central to understanding energy flow through the system. Here we assess how the solar wind interacts with the Uranian magnetosphere via magnetic reconnection. Analytical models of conditions at the magnetopause are combined with current understanding of reconnection onset to predict where reconnection may occur on the boundary. The results suggest that conditions at Uranus' magnetopause are generally less favorable for reconnection than those at the magnetopause of any planet closer to the Sun, as a result of how typical solar wind parameters vary with heliocentric distance. The location of reconnection sites on the Uranian magnetopause is likely to be highly dependent on not only the interplanetary magnetic field orientation but also planetary longitude and season. Solar wind–magnetosphere coupling via magnetic reconnection may be stronger under near‐solstice conditions than under near‐equinox conditions. We discuss the typical reconnection electric field strength at Uranus' magnetopause and suggest that the typical reconnection voltage is considerably less than 40 kV. Complimentary assessments of other means of coupling to the solar wind (e.g., via a “viscous‐like” interaction) are needed to establish the overall nature of solar wind–magnetosphere coupling at Uranus.

Journal article

Sulaiman AH, Masters A, Dougherty MK, Jia Xet al., 2014, The magnetic structure of Saturn's magnetosheath, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 5651-5661, ISSN: 2169-9380

Journal article

Pilkington NM, Achilleos N, Arridge CS, Masters A, Sergis N, Coates AJ, Dougherty MKet al., 2014, Polar confinement of Saturn's magnetosphere revealed by in situ Cassini observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 2858-2875, ISSN: 2169-9380

Journal article

Fuselier SA, Frahm R, Lewis WS, Masters A, Mukherjee J, Petrinec SM, Sillanpaa IJet al., 2014, The location of magnetic reconnection at Saturn's magnetopause: A comparison with Earth, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 2563-2578, ISSN: 2169-9380

Journal article

Masters A, Fujimoto M, Hasegawa H, Russell CT, Coates AJ, Dougherty MKet al., 2014, Can magnetopause reconnection drive Saturn's magnetosphere?, GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 1862-1868, ISSN: 0094-8276

Journal article

Mistry R, Dougherty MK, Masters A, Sulaiman AH, Allen EJet al., 2014, Separating drivers of Saturnian magnetopause motion, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 1514-1522, ISSN: 2169-9380

Journal article

Collinson GA, Sibeck DG, Masters A, Shane N, Zhang TL, Fedorov A, Barabash S, Coates AJ, Moore TE, Slavin JA, Uritsky VM, Boardsen S, Sarantos Met al., 2014, A survey of hot flow anomalies at Venus, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 978-991, ISSN: 2169-9380

Journal article

Masters A, Phan TD, Badman SV, Hasegawa H, Fujimoto M, Russell CT, Coates AJ, Dougherty MKet al., 2014, The plasma depletion layer in Saturn's magnetosheath, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 121-130, ISSN: 2169-9380

Journal article

Ghavamian P, Schwartz SJ, Mitchell J, Masters A, Laming JMet al., 2014, Electron-Ion Temperature Equilibration in Collisionless Shocks: The Supernova Remnant-Solar Wind Connection, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 557-587, ISBN: 978-1-4899-7412-9

Book chapter

Eastwood JP, Phan TD, Oieroset M, Shay MA, Malakit K, Swisdak M, Drake JF, Masters Aet 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

Journal article

Masters A, Stawarz L, Fujimoto M, Schwartz SJ, Sergis N, Thomsen MF, Retino A, Hasegawa H, Zieger B, Lewis GR, Coates AJ, Canu P, Dougherty MKet al., 2013, <i>In situ</i> observations of high-Mach number collisionless shocks in space plasmas, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 55, ISSN: 0741-3335

Journal article

Ghavamian P, Schwartz SJ, Mitchell J, Masters A, Laming JMet al., 2013, Electron-Ion Temperature Equilibration in Collisionless Shocks: The Supernova Remnant-Solar Wind Connection, SPACE SCIENCE REVIEWS, Vol: 178, Pages: 633-663, ISSN: 0038-6308

Journal article

Masters A, Slavin JA, DiBraccio GA, Sundberg T, Winslow RM, Johnson CL, Anderson BJ, Korth Het al., 2013, A comparison of magnetic overshoots at the bow shocks of Mercury and Saturn, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 4381-4390, ISSN: 2169-9380

Journal article

Walsh AP, Arridge CS, Masters A, Lewis GR, Fazakerley AN, Jones GH, Owen CJ, Coates AJet al., 2013, An indication of the existence of a solar wind strahl at 10AU, GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 2495-2499, ISSN: 0094-8276

Journal article

Branduardi-Raymont G, Ford PG, Hansen KC, Lamy L, Masters A, Cecconi B, Coates AJ, Dougherty MK, Gladstone GR, Zarka Pet al., 2013, Search for Saturn's X-ray aurorae at the arrival of a solar wind shock, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 2145-2156, ISSN: 2169-9380

Journal article

Sergis N, Jackman CM, Masters A, Krimigis SM, Thomsen MF, Hamilton DC, Mitchell DG, Dougherty MK, Coates AJet al., 2013, Particle and magnetic field properties of the Saturnian magnetosheath: Presence and upstream escape of hot magnetospheric plasma, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 1620-1634, ISSN: 2169-9380

Journal article

Badman SV, Masters A, Hasegawa H, Fujimoto M, Radioti A, Grodent D, Sergis N, Dougherty MK, Coates AJet al., 2013, Bursty magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 1027-1031, ISSN: 0094-8276

Journal article

Masters A, Stawarz L, Fujimoto M, Schwartz SJ, Sergis N, Thomsen MF, Retino A, Hasegawa H, Zieger B, Lewis GR, Coates AJ, Canu P, Dougherty MKet al., 2013, Electron acceleration to relativistic energies at a strong quasi-parallel shock wave, NATURE PHYSICS, Vol: 9, Pages: 164-167, ISSN: 1745-2473

Journal article

Masters A, Stawarz Ł, Fujimoto M, Schwartz SJ, Sergis N, Thomsen MF, Retinò A, Hasegawa H, Zieger B, Lewis GR, Coates AJ, Canu P, Dougherty MKet al., 2013, Electron acceleration to relativistic energies at a strong quasi-parallel shock wave

Electrons can be accelerated to ultrarelativistic energies at strong (high-Mach number) collisionless shock waves that form when stellar debris rapidly expands after a supernova [4, 2, 19]. Collisionless shock waves also form in the flow of particles from the Sun (the solar wind), and extensive spacecraft observations have established that electron acceleration at these shocks is effectively absent whenever the upstream magnetic field is roughly parallel to the shock surface normal (quasi-parallel conditions) [16, 8, 10, 17, 14]. However, it is unclear whether this magnetic dependence of electron acceleration also applies to the far stronger shocks around young supernova remnants, where local magnetic conditions are poorly understood. Here we present Cassini spacecraft observations of an unusually strong solar system shock wave (Saturn’s bow shock) where significant local electron acceleration has been confirmed under quasi- parallel magnetic conditions for the first time, contradicting the established magnetic dependence of electron acceleration at solar system shocks [16, 8, 10, 17, 14]. Furthermore, the acceleration led to electrons at relativistic energies (∼ MeV), comparable to the highest energies ever attributed to shock-acceleration in the solar wind [16]. These observations suggest that at high-Mach numbers, like those of young supernova remnant shocks, quasi-parallel shocks become considerably more effective electron accelerators. For full details please see: Nature Physics, Volume 9, Issue 3, pp. 164-167.

Conference paper

Kasahara S, Kronberg EA, Kimura T, Tao C, Badman SV, Masters A, Retino A, Krupp N, Fujimoto Met al., 2013, Asymmetric distribution of reconnection jet fronts in the Jovian nightside magnetosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 375-384, ISSN: 2169-9380

Journal article

Volwerk M, Andre N, Arridge CS, Jackman CM, Jia X, Milan SE, Radioti A, Vogt MF, Walsh AP, Nakamura R, Masters A, Forsyth Cet al., 2013, Comparative magnetotail flapping: an overview of selected events at Earth, Jupiter and Saturn, ANNALES GEOPHYSICAE, Vol: 31, Pages: 817-833, ISSN: 0992-7689

Journal article

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