Space Physics at UVA

Publications

2007 | 2006| 2005 | 2004 | 2003| 2002| 2001 | 1986 - 2000 | prior to 1986

2007

Burger, M.H., E.C. Sittler Jr., R.E. Johnson, H.T. Smith, O.J. Tucker, and V.I. Shematovich, "Understanding the escape of water from Enceladus", JGR 112, A06219, doi:10/1029/2006JA012086, 2007. (pdf)

Chaufray, J.Y., R. Modolo, F. Leblanc, G. Chanteur, R.E. Johnson, and J.G. Luhmann, "Mars Solar Wind interaction: formation of the Martian corona and atmosphric loss to space", JGR 112, E09009, doi:10.1029/2007JE002915, 2007.(pdf)

Cassidy, T.A., R.E. Johnson, M.A. McGrath, M.C. Wong, J.F. Cooper, "The spatial morphology of Europa's near-surface O2 atmosphere", Icarus 191, 755-764 (2007) (pdf)

De La Haye, V., J.H. Waite Jr., T.E. Cravens, A.F. Nagy, R.V. Yelle, R.E. Johnson, S. Lebonnois, I.P. Robertson, "Titan's corona: The contribution of exothermic chemistry", Icarus 191, 236-250 (2007) (pdf)

De La Haye, V., J.H. Waite Jr., R.E. Johnson, et al., "Cassini Ion and Neutral Mass Spectrometr data in Titan's upper atmosphere and exosphere: Observation of a suprathermal corona", JGR 112, A07309, doi:10.1029/2006JA012222, 2007. (pdf)

Leblanc, F. E. Chassefiere, R.E. Johnson, D.M. Hunten, E. Kallio, D.C. Delcourt, R.M. Killen, J.G. Luhmann, A.E. Potter, A. Jambon et al, "Mercury's exosphere origins and relations to its magnetosphere and surface", Plant. Space Sci. 55, 1069-1092 (2007). (pdf)

Rymer, A.M., B.H. Mauk, T.H. Hill, C. Paranicas, N. Andre, E.C. Sittler Jr., D.G. Mitchell, H.T. Smith, R.E. Johnson, A.J. Coates, D.T.Young, S.J. Bolton, M.F. Thomsen, and M.K. Dougherty, "Electron source in Saturn's magnetosphere", JGR 112, A02201, dio:10.1029/2006JA012017, 2007.(pdf)

Smith, H.T., R.E. Johnson, E.C. Sittler, M. Shappirio, D. Reisenfeld, O .J. Tucker, M. Burger, F.J. Crary, D.J. McComas, D.T. Young, "Enceladus: The likely dominant nitrogen source in Saturn's magnetosphere", Icarus 188, 356-366 (2007). (pdf)

2006

Bouhram, M, R.E. Johnson, J.-J. Berthelier, J.-M. Illiano, R.L. Tokar, D.T. Young, and F.J. Crary, "A test-particle model of the atmosphere/ ionosphere system of Saturn's main rings", Geophys. Res. Letts. 33, L05106, doi:10.1029/2005GL025011(2006). (pdf)

Cooper, J.F., R.E. Johnson, and J.D. Richardson, "Space Physics, Mars and Life", Astrobiology 6, 437-438 (2006). (pdf)

Grundy, W.M., L.A. Young, J.R. Spencer, R.E. Johnson, E.F. Young, M.W. Buie, "Distributions of H2O and CO2 ices on Ariel, Umbriel, Titania, and Oberon from IRTF/SpeX Observations", Icarus 184, 543-555 (2006).(pdf)

Hartle, R.E., E.C. Sittler, F.M. Neubauer, R.E. Johnson, H.T. Smith et al., "Initial interpretation of Titan plasma interaction as observed by the Cassini plasma spectrometer: Comparisons with Voyager 1", Planetary and Space Science 54, 1211-1224 (2006). (pdf)

Hartle, R.E., E.C. Sittler, F.M. Neubauer, R.E. Johnson, H.T. Smith, F. Crary, D.J. McComas, D.T. Young, A.J. Coates, D. Simpson, S. Bolton, D. Reisenfeld, K. Szego, J.J. Berthelier, A. Rymer, J. Vilppola, J.T. Steinberg, and N. Andre, "Preliminary interpretation of Titan plasma interaction as observed by the Cassini Plasma Spectrometer: Comparisons with Voyager 1", Geophys. Res. Letts. 33, L08201, doi:10.1029/2005GL024817 (2006). (pdf)

Johnson, R.E. and P.J. Huggins, "Toroidal Atmosphere around Extrasolar Planets", Astron. Soc. of the Pacific 118, 1136-1143 (2006)(pdf).

Johnson, R.E., H.T. Smith, O.J. Ticker, M. Liu, and R. Tokar, "The Enceladus and OH Tori at Saturn", Astrophys. J. Letts. 644:L137-L139 (2006) (pdf).

Johnson, R.E., J.G. Luhmann, R.L. Tokar, M. Bouhram, J.J. Berthelier, E.C. Siler, J.F. Cooper, T.W. Hill, H.T. Smith, M. Michael, M. Liu, F.J. Crary, D.T. Young,"Production, Ionization and Redistribution of O2 Saturn's Ring Atmosphere", Icarus 180, 393-402 (2006).(pdf)

Luhmann, J.G., R.E. Johnson, R.L, Tokar, S.A. Ledvina, and T.E. Cravens, "A model of Saturn's rings and its implications", Icarus 181, 465-474 (2006). (pdf)

Sittler, E.C. Jr., R.E. Johnson, H.T. Smith, J.D. Richardson, S. Jurac, M. Moore, J.F. Cooper, B.H. Mauk, M. Michael, C. Paranicas, T.P. Armstrong, and B. Tsurutani, "Energetic Nitrogen Ions within the Inner Megnetosphere of Saturn", JGR 111, A09223, doi:10.1029/2004JA010509 (2006) (pdf).

Sittler, E.C. Jr., M. Thpmsen, R.E. Johnson et al., "Cassini observations of Saturn's inner plasmasphere: Saturn orbit insertion results", Planetary & Space Sci. 54, 1197-1210 (2006) (pdf).

Tokar, R.L., R.E. Johnson, T.W. Hill, D.H. Pontius, W.S. Kurth, F.J. Crary, D.T. Young, M.F. Thompsen, D.B. Reisenfeid, A.J. Coates, G.R. Lewis, E.C. Sittler, D.A. Gurnett, "The Interaction of the Atmosphere of Enceladus with Saturn's Plasma', Science 311, 1409-1412 (2006). (pdf)

2005

Carlson, R.W., M.S. Anderson, R. Mehlman, R.E. Johnson, "Distribution of hydrate on Europa: Further evidence for sulfuric acid hydrate", Icarus 77, 461-471 (2005).(pdf)

Cassidy, T.A. and R.E. Johnson,"Monte Carlo model of sputtering and other ejection processes within a regolith", Icarus 176, 499-507(2005). (pdf)

Coates, A.J. et al.,"Plasma electrons above Saturn's main rings: CAPS observations", GRL 32, L14S09, doi:10.1029/2005GL022694(2005). (pdf)

Elsner, R.F., B.D. Ramsey, J.H. Waite, P. Rehak, R.E. Johnson, J.F. Cooper, and D.A. Swartz,"X-ray probes of Magnetospheric interactions with Jupiter's auroral zones, the Galilean satellites, and the Io plasma torus" Icarus 178, 417-428 (2005).(pdf)

Johnson, R.E., M. Liu, and E.C. Sittler, "Plasma-Induced Clearing and Redistribution of, Material Embedded in Planetary Magnetospheres", Geophys. Res. Letts. 32, L24201, doi:10.1029/2005GL024275, 2005. (pdf)

Johnson, R.E., P.D. Cooper, T.I. Quickenden, G.A. Grieves, T.M. Oriando, "Production of oxygen by electronically induced dissociations in ice", J. Chem. Phys. 123, 184715-1-8(2005). (pdf)

Leblanc F., A. Potter, R. Killen, and , R. E. Johnson , " Origins of Europa Na cloud and trous", Icarus 178, 367-385 (2005). (pdf)

Luna, H, C. McGrath, M.B. Shah, R.E. Johnson, M. Liu, C.J. Latimer, and E.C. Montenegro, "Dissociative Charge Exchange and Ionization of O2 by fast H+ and O+ ions: Energetic Ion Interactions in Europa's Oxygen Atmosphere and Neutral Torus", Astronphysical Journal 628, 1086-1096 (2005).(pdf)

Michael, M., R.E. Johnson, F. Leblanc, M. Liu, J.G. Luhmann, and V.I. Shematovich,"Ejection of Nitrogen from Titan's Atmosphere by Magnetosphric Ions and Pick-up Ions", Icarus 175, 263-267(2005).(pdf)

Michael, M. and R.E. Johnson, "Energy deposition of pickup ions and heating of Titan's atmosphere", Planetary&Space Sci. 53, 1510-1514 (2005). (pdf)

Shematovich, V.I., R.E. Johnson, J.F. Cooper, and M.C. Wong, "Surface- bounded Atmosphere of Europa", Icarus 173, 480-498 (2005). (pdf)

Sittler, E.C. Jr., R.E. Hartle, A.F. Vinas, R.E. Johnson, H.T. Smith, and I. Mueller-Wodarg, "Titan interaction with Saturn's magne doi:10.1029/2004JA010759,2005. (pdf)

Sittler, E.C. Jr., et al.,"Preliminary results on Saturn's inner plasmasphere as observed by Cassini: Comsition with Voyager", Geophys. Res. Letts. 32, L14S07, doi:10.1029/2005GL022653(2005). (pdf)

Smith, H.T., M. Shappirio, E.C. Sittler, D. Reisenfeld, R.E. Johnson, R.A. Baragiola, F.J. Crary, D.J. McComas, and D.T. Young, "Discovery of Nitrogen in Saturn's InnerMagnetosphere", Geophys. Res. Letts. 32, L14S03, doi:10.1029/2005GL022654(2005). (pdf)

Szego, K. et al., "The global plasma enviromentt of Titan as observed by Cassini Plasma Spectrometer during the first two close encounters with Titan", Geophys. Res. Letts. 32, L20s05, doi:10.1029/2005GL022646, 2005.(pdf)

Tokar, R.L., R.E. Johnson et al.,"Cassini Observations of the Thermal Plasma in the Vicinity of Saturn's Main Rings and the F and G rings", Geophys. Res. Letts. 32, L14S04, doi:10.1029/2005GL022690,2005.(pdf)

Tucker, O.J., D.S. Ivanov, R.E. Johnson, L.V. Zhigilei, and E.M. Bringa, " Molecular dynamics simulation of sputtering from a cylindrical track: EAM versus pair potentials", Nucl. Instrum. and Methods B 228, 163-169 (2005). (pdf)

Young, D.T. et al."Composition and Dynamics of Plasma in Saturn's Magnetosphere", Science 307, 1262-1266 (2005). (pdf)

2004

Anders, C., H.M. Urbassek, and R.E. Johnson, "Linearity and additivity in cluster- induced sputtering: a molecular-dynamics study of van-der-Waals bonded systems", Phys. Rev. B 70, 155404-1 - 4 (2004). (pdf)

Bringa, E.M. and R.E. Johnson, "A New Model for Cosmic-Ray Ion Erosion of Volatiles from Grains in The Interstellar Medium", Astrophys. J. 603, 159-164 (2004).(pdf)

Burger, M.H. and R.E. Johnson, "Europa's neutral cloud: morphology and comparison to Io", Icarus 171, 557-560 (2004).

(pdf) Funsten, H.O., S.M. Ritzau, R.W. Harper, J.E. Borovsky, and R.E. Johnson, "Energy Loss by keV Ions in Silicon", Phys. Rev. Lett. 92, 213201-1-4 (2004).(pdf)

Johnson, R.E.,"The Magnetospheric Plasma-Driven Evolution of Satellite Atmospheres", The Astrophysical Journal. 609: L99-L102 (2004).(pdf)

Johnson, R.E., R.W. Carlson, J.F. Cooper, C. Paranicas, M.H. Moore, and M.C. Wong,"Radiation Effects on the Surface of the Galilean Satellites", In Jupiter-The Planet, Satellites and Magnetosphere, Ed. F. Bagenal, T. Dowling, and W.B. McKinnon, Cambridge University, Cambridge. Chapter 20, pp485-512 (2004).(pdf)

McGrath, MA, E Lellouch, D.F. Strobel, P. D. Feldman, R. E. Johnson , "Satellite Atmospheres", In Jupiter-The Planet, Satellites & Magnetosphere, ed. F. Bagenal, T. Dowling, and W. B. McKinnon, Cambridge University Press, Cambridge. Chapter 19, pp457-483(2004). (pdf)

Sittler, E.C., R.E. Johnson, S. Jurac, J.D. Richardson, M. McGrath, F. Crary, D.T. Young, and J.E. Nordholt, "Pickup ions at Dione and Enceladus: Cassini Plasma Spectrometer simulations", J. Geophys. Res. 109, A01214, doi:10.1029/2002JA009647 (2004). (pdf)

Smith, H.T., R.E. Johnson, and V.I. Shematovich, "Titan's Atomic and Molecular Nitrogen Tori", Geophys. Res. Lett.31, L16804, doi:10.1029GL020580(2004).(pdf)

Young, D.T. et al."Cassini Plasma Spectrometer Investigation" , Space Science Reviews, doi: 10.1007/s11214-004-1406-4, pp.1-112 (2004). (pdf)

2003

Bringa, E.M. and R.E. Johnson, "Ion Interaction with Solids: Astrophysical Application", in Solid State Astrochemistry (eds V. Pirronello, J. Krelowaky) Kluwer, Netherlands, pp 357-393 (2003). (pdf)

Cooper, P.D., R.E. Johnson, and T.I. Quickenden, "A review of possibly optica absorption features of oxygen molecules in icy surface of outer solar system bodies" Planet. &Space Sci. 51, 183-192 (2003).(pdf)

Cooper, P.D., R.E. Johnson, and T.I. Quickenden, "Hydrogen Peroxide Dimers and the Production of O2 in icy Satellite Surfaces", Icarus 166, 444-446 (2003) (pdf).

Johnson, R.E., T.I. Quickenden, P.D. Cooper, A.J. McKinley, and C. Freeman, "The production of oxidants in Europa's surface", Astrobiology 3, n4, 823-850 (2003). (pdf)

Leblanc, F. and R.E. Johnson, "Mercury's Sodium exosphere", Icarus 164, 261- 281 (2003) (pdf)

Leblanc, F., J.G. Luhmann, R.E. Johnson, and M. Liu , "Solar energetic particle event at Mercury", Planet. and Space Sci. 51, 339-352 (2003). (pdf)

Leblanc F., D. Delcourt , and R. E. Johnson , "Mercury's sodium exosphere: Magnetospheric ion recycling", J. Geophys. Res. 108, doi:10.1029/2003 JE002151(2003). (pdf)

Luna, H., M. Michael, M.B. Shah, R.E. Johnson, C.J. Latimer, and J.W. McConkey, "Dissociation of N2 in capture and ionization collisions with fast H+ and N+ ions and modeling of positive ion formation in the Titan atmosphere" J. Geophys. Res.108, doi:10.1029/2002JE001950 (2003).(pdf)

Shematovich, V.I., R.E. Johnson, M. Micheal, and J.G. Luhmann, "Nitrogen loss from Titan", J. Geophys. Res. 108, doi:10.1029/2003JE002094,(2003). (pdf)

Strazzulla, G., J.F. Cooper, and R.E. Johnson, "Ion irradiation of TNOs: from the fluxes measured in space to the laboratory experiments", Comp. Ren. Physique 1, 791-801 (2003).(pdf)

Tully, C., R.E. Johnson,"Erratum : 'Semiclassical calculation of collisional dissociation cross section for N+N2' [ J. Chem. Phys. 117, 6556 (2002)]", J. Chem. Phys. 119, 10452-10453 (2003) . (pdf)

2002

Bhardwaj, A. et al., "Soft X-ray Emissions from Planets, Moons, and Comets", Proc. ESLAB 36 Symposium, 'Earth-Like Planets and Moons', ESTEC noordwijk, 3-8 , 215, June 2002 (ESA SP-514, October 2002) (pdf)

Blanc, M. et al.,"Magnetospheric and Plasma Science with Cassini- Huygens", Space Science Revs. 104, 253-346 (2002). (pdf)

Bringa, E.M. and R.E. Johnson, "Sputtering of nano-grains by energetic ions", Nucl. Instr. and Meth. in Phys. Res. B193, 365-370 (2002). (pdf)

Bringa, E.M. , E. Hall, R.E. Johnson, and R. Papaleo, "Crater formation by ion bombardment as a function of incident angle", Nucl. Instr. and Meth. in Phys. Res.B 193, 734-738 (2002).(pdf)

Bringa, E.M., R.E. Johnson, and R.M. Papaleo, "Crater Formation by Single ions in the Electronic Stopping Regime: Comparison of Moleculer Dynamics with Experiments on Organic Films:, Phys. Rev B65, 094113-1-8 (2002). (pdf)

Bringa, E.M. and R.E. Johnson, "Coulomb Explosion and Thermal Spikes" Phys. Rev. Lett. 88,165501-1-4 (2002). (pdf)

Carlson, R.W., M.S. Anderson, R.E. Johnson, M.B. Schulman, and A.H. Yavouian, "Sulfuric Acid Production on Europa: The Radiolysis of Sulfur in Water Ice", Icarus 157, 456-463 (2002). (pdf)

Elsner, R.F., G.R. Gladstone, J.H. Waite, F.J. Crary, R.R. Howell, R.E. Johnson, P.G. Ford, A.E. Metzger, K.C. Hurley, E.D. Feigelson, G.P. Garmire, A. Bhardwaj, D.C. Grodent, T. Majeed, A.F. Tennant, and M.C. Weisskopf,"Discovery of Soft X-Ray Emission from Io, Europa, and the Io Plasma Torus", Astrophys. J. 572,1077-1082 (2002). (pdf)

Jakas, M.M., E.M. Bringa, and R.E. Johnson, "Fluid dynamics calculation of sputtering from a cylindrical thermal spike", Physical Review B 65, 165425-1 - 9 (2002). (pdf)

Johnson, R.E., "Surface Boudary Layer Atmospheres", Chapter in Atmospheres in the Solar System: Comparative Aeronomy Geophysical Monograph 130, pp203-219 (2002). (pdf)

Johnson, R.E., M. Liu, and C. Tully,"Collisional Dissociations Cross Sections for O+O2, CO and N2, O2+O2, N+N2 and N2+N2", Planetary and Space Science 50(1) 123-128 (2002). (pdf)

Johnson, R.E., F. Leblanc, B.V. Yakshinskiy and T.E. Madey, "Energy Distributions for Desorption of Sodium and Potassium from Ice: the Na/K ratio at Europa", Icarus 156, 136-142 (2002). (pdf)

Jurac, S., M.A. McGrath, R.E. Johnson, J.D. Richarson, V.M. Vasyliunas, and A. Eviatar, "Saturn: Search for a missing water source" Geophys. Res. Letts. 29, 25-1-4, doi:10.1029/2002GL015855 (2002). (pdf)

Leblanc, F. and R.E. Johnson,, "Role of molecular species in pickup Ion sputering of the Martian atmosphere", J. Geophys. Res. 107, 5-1 -6 doi:10.1029/2000JE001473 (2002) (pdf)

Leblanc, F., J.G. Luhmann, R.E. Johnson, and E. Chassefiere, "Some expected impacts of a solar energetic particle event at Mars", J. Geophys. Res 107, doi:10.1029/2001JA900178 (2002). (pdf)

Leblanc, F. , R.E. Johnson and M.E. Brown, "Europa's Sodium Atmosphere: an Ocean Source? ", Icarus 159,132-144 (2002). (pdf)

Madey, T.E., R.E. Johnson and T.M. Orlando, "Far-out surface science: radiation-induced surface processes in the solar system" Surface Science 500, 838-858 (2002). (pdf)

Paranicas, C., B.H. Mauk, J.M. Ratliff, C. Cohen, and R.E. Johnson, "The ion enviroment near Europa and its role in surface energetics" Geophys. Res. Letts. 29, 18-1 - 4 (2002).(pdf)

Tully, C., R.E. Johnson,"Semiclassical calculation of collisional dissociation cross section for N+N2", J. Chem. Phys. 117, 6556 - 6561 (2002) (pdf)

2001

Bringa, E.M. and R.E. Johnson, "Angular Dependence of the Sputtering Yield from a Cylindrical Track", Nucl. Instrum. Method B180, 99-104 (2001). (pdf)

Cooper, J.F ., R.E. Johnson, B.H. Mauk, H.B. Garrett, and N. Gehrels "Energetic Ion and Electron Irradiation of the Icy Galilean Satellites" Icarus 149(1), 133-159 (2001). (pdf)

Johnson, R.E. and F. Leblanc, "The Physics and Chemistry of Sputtering by Energetic Plasma Ions", Astrophysics and Space Science 277, 259-269 (2001). (pdf)

Johnson, R.E., "Surface Chemistry in the Jovian Magnetosphere Radiation Environment", Chemical Dynamics in Extreme Environments (R. Dessler, ED), Adv. Ser. in Phys. Chem. World Scientific, Singapore 11, Chap 8, 390-419 (2001). (pdf)

Jurac, S., R.E. Johnson, J.D. Richardson, C. Paranicas, " Satellite Sputtering in Saturn's Magnetosphere", Planet & Space Sci. 49(3-4), 319-326 (2001). (pdf)

Jurac, S., R.E. Johnon, J.D. Richarson, "Saturn's E ring and Production of the Neutral Torus", Icarus 149, 384-396 (2001). (pdf)

Leblanc, F. and R.E. Johnson, "Sputtering of the Martian Atmosphere by Solar Wind Pick-up Ions", Planetary Space Science 49(6), 645-656 (2001) (pdf)

Mukai, T., J. Blum, A.M. Nakamura, R.E. Johnson, and O. Havnes, "Physical Processes on Interplanetary Dust", in Interplanetary Dust (ed. E. Grun et al.) Springer, Berling pp.445-507 (2001). (pdf)

Paranicas, C., R.W. Carlson and R.E. Johnson, "Electron Bombardment of Europa", Geophys. Res. Lett. 28, 673-676 (2001). (pdf)

Shematovich, V.I., C. Tully and R.E. Johnson, "Suprathermal Nitrogen Atoms and Molecules in Titan's Corona", Adv. Space Res. 27, 1875-1880 (2001). (pdf)

Shematovich, V.I. and R.E. Johnson, "Near-Surface Oxygen Atmosphere at Europa", Adv. Space Res., 27, 1881-1888 (2001). (pdf)

Tully, C. and R.E.Johnson,"Low Enenrgy Collisions Between Ground State Oxygen Atoms", Planet& Space Sci. 49(6), 533-537 (2001). (pdf)