Space Physics at UVA

Publications

2016

Cooper, J.F, Edward C. Sittler, Robert E. Johnson, Peter Kollman, Elias Roussos, Atmospheric, Ionospheric, and Energetic Radiation Environments of Saturn’s Rings. Chap. In Saturn’s Rings, submitted (2016)

Dukes, C  and R.E. Johnson Surface Interaction Contributions to the Lunar Exosphere; Chapt in Encyclopedia of Lunar Science, ed. B. Cudnik. Submitted (2016)

Johnson, R.E., A.N. Volkov, O.J. Tucker. Evolution of an Early Titan Atmosphere, Icarus 271, 202-206 (2016)

Schaible, M. and R.E. Johnson. High energy electron sintering of icy regoliths: formation of the PacMan anomalies at Saturn. Icarus, in press (2016)

Tucker, O.J., W. Waalkes, V.M. Tenishev, R.E. Johnson, A.Bieler, M.R.,A.F. Nagy.
Examining the exobase approximation: DSMC models of Titan’s upper atmosphere, Icarus (2016)

Tully, C and R.E. Johnson, Cross Section for Escape from Mars Atmosphere, Icarus (in preparation) (2016)

Turner, J.D., D. Christie, P. Arras, R.E. Johnson, C. Schmidt Investigation of the environment around close-in transiting exoplanets using CLOUDY. Mon. Not. R. Astron. Soc. (2016)

Wang, Y-C, J. G. Luhmann, A. Rahmati, F. Leblanc, R.E. Johnson, T.E. Cravens, W-H. Ip, Cometary sputtering of the Martian atmosphere during the Siding Spring encounter. Icarus 272,  301–308 (2016)

2015

Johnson, R.E., A. Oza, L. Young, A. Volkov, C. Schmidt. Volatile Loss and Classification of Kuiper Belt Objects, The Astrophysical Journal, Volume 809:43, 9pp (2015)

Schmidt, Carl A.; Johnson, Robert E.; Baumgardner, Jeffrey; Mendillo, Michael Observations of sodium in the coma of Comet C/2012 S1 (ISON) during outburst. Icarus 247, 313-318 (2015).

Sillanpää, I.; R. E. Johnson, The role of ion-neutral collisions in Titan's magnetospheric interaction, Planet.& Space Sci. 108, p. 73-86 (2015)

Tucker, O.J., R.E. Johnson and L. Young, Gas transfer in the Pluto-Charon system: A Charon atmosphere, Icarus 246, 291-297 (2015)

Wang, Y-C, J.G. Luhmann, X. Fang, F. Leblanc, R. E. Johnson, Y. Ma, and W-H. Ip. Statistical studies on Mars atmospheric sputtering by precipitating pickup O+: preparation for the MAVEN mission. JGR: Planets 120, 34-50 (2015)

Woodson, A.K., H.T. Smith, F.J. Crary, R.E. Johnson.  Ion composition in Titan's exosphere via the Cassini Plasma Spectrometer I: T40 encounter. JGR: Space Physics 120, 212-234 (2015)

2014

Elrod, M.K., W-L Tseng, A.K. Woodson, R.E. Johnson, Seasonal and Radial. Trends in Saturn's Thermal Plasma Between the Main Ringes and Enceladus, Icarus 242, 130-137 (2014)

Paranicas, C., E. Roussos, R. Decker, R. Johnson, A. Hendrix, P. Schenk, T. Cassidy, B. Dalton, C.J. Howett, P. Kollmann, W. Patterson, K. Hand, T. Nordheim, N. Krupp, D. Mitchell. The lens feature on the inner Saturnian satellites, Icarus 234, 155-161 (2014)

Schmidt, C. A., R.E. Johnson, J. Baumgardner, M. Mendillo. Observations of sodium in the coma of Comet C/2012 S1 (ISON) during outburst. Icarus 247, 313-318 (2015) (submitted in 2014)

Johnson, R.E., A. Oza, L. Young, A. Volkov, C. Schmidt ,Volatile Loss and Classification of Kuiper Belt Objects, ApJ (in preparation) (2014)

Tucker, O.J., R.E. Johnson and L. Young, Gas transfer in the Pluto-Charon system: A Charon atmosphere, Icarus 246, 291-297 (2015)(submitted 2014)

Wang, Y., J.G. Luhmann, F. Leblanc, X. Fang, R.E. Johnson, Y. Ma, W.-H. Ip, L. Li, Modeling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere, GR 119, 93-108 (2014)

 

2013

Cassidy, T.A., C.P. Paranicas, J.H. Shirley, J.B. Dalton, B.D. Teolis, R.E. Johnson, L. Kamp, A.R. Hendrix, Magnetospheric ion sputtering and water ice grain size at Europa, Plane & Space Sci. 77, 64-73 (2013).  (pdf)

Deighan, J. ans R.E. Johnson, Characterization of a Thick Ozone Layer in Mars' Past, Astroph: arXiv: 1303.3826 (2013) (pdf)

Elrod, M.K., W-L Tseng, A.K. Woodson, R.E. johnson, "Seasonal and Radial Trends in Saturn's Thermal Plasma Between the Main Ringes and Enceladus", Icarus (2013) (pdf)

Erwin, J., O.J. Tucker, R.E. Johnson, "Hybrid fluid/kinetic modeling of Pluto's atmosphere", Icarus 226, 375-384 (2013). (pdf)

Fang, X., S.W. Stephen, R.E. Johnson, J.G. Luhmann, Y. Ma, Y. Wang, and M.W. Liemohn, The Importance of Pickup Oxygen Ion Precipitation to the Mars Upper Atmosphere Under Extreme Solar Wind Conditions, GRL 40, 1-6, doi:10.1002/grl50415, 2013. (pdf)

Funsten, H.O., F. Allegrini, P.A. Bochsler, S.A. Fuselier, M. Gruntman, K. Henderson, P.H. Janzen, R.E. Johnson, B.A. Larsen, D.J. Lawrence, D.J. McComas, E. Mobius, D.B. Reisenfeld, D. Rodrigucz, N.A. Schwadron, and P. Wurz, Reflection of Solar Wind Hydrogen from the Lunar Surface, JGR 118, 292-305 (2013). (pdf)

Johnson, R.E., A.N. Volkov and J.T. Erwin, MOLECULAR-KINETIC SIMULATIONS OF ESCAPE FROM THE EX-PLANET AND EXOPLANETS: CRITERION FOR TRANSONIC FLOW, Astrophys J. Lett. 768:L4 (6pp), 2013.(pdf)

Johnson, R.E., A.N. Volkov and J.T. Erwin, "ERRATUM: MOLECULAR-KINETIC SIMULATIONS OF ESCAPE FROM THE EX-PLANET AND EXOPLANETS: CRITERION FOR TRANSONIC FLOW, Astrophys J. Lett. 779:L30 (1pp), 2013. (pdf)

Johnson, R.E., R. Carlson, T.A. Cassidy, M. Fama, "Sputtering of ices", Chapter in Science of Solar System Ices. ed. M. Gutipati, J.C. castillo-Rogez, Astrophysics & Space Science Library 356, pp551-581 (2013). (pdf)

Paranicas, C., E. Roussos, R. Decker, R. Johnson, A. Hendrix, P. Schenk, T. Cassidy, B. Dalton, C.J. Howett, P. Kollmann, W. Patterson, K. Hand, T. Nordheim, N. Krupp, D. Mitchell, "The lens feature on the inner Saturnian satellites", Icarus (2013). submitted (pdf)          

Tseng, W.-L., R.E. Johnson, and M.K. Elrod, "Modeling the seasonal variability of the plasma environment in Saturn's magnetosphere between main rings and Mimas", Plan & Space Sci. 77, 126-135 (2013).

Tseng, W.-L., R.E. Johnson and W.-H. Ip, "The atomic hydrogen cloud in the saturnian system," Planetary and Space Science 85, 164-174 (2013). (pdf)    

Tucker, O.J., R.E. Johnson, J.I. Deighan, A.N. Volkov, Diffusion and thermal escape of H2 from Titan's atmosphere: Monte Carlo Simulations, Icarus 222, 149-15 (2013) (pdf)

Volkov, A.N. and R.E. Johnson, "THERMAL ESCAPE IN THE HYDRODYNAMIC REGIME: RECONSIDERATION OF PARKER's ISENTROPIC THEORY BASED ON RESULTS OF KINETIC SIMULATIONS", The Astrophysical Journal 765:90 (21pp), 2013. (pdf)

Volkov, A.N. and R.E. Johnson, "ERRARUM: THERMAL ESCAPE IN THE HYDRODYNAMIC REGIME: RECONSIDERATION OF PARKER's ISENTROPIC THEORY BASED ON RESULTS OF KINETIC SIMULATIONS", The Astrophysical Journal 774: 90 (1pp), 2013. (pdf)

Volkov, A.N., R.E. Johnson, and O.J. Tucker, Expansion of Monatomic and Diatomic Gases from a Spherical Source into a Vacuum in a Gravitational Field, Fluid Dynamics 48, 239- 250. Pleiades Publishing, Ltd., 2013.(pdf)

Wang, Y., J.G. Luhmann, F. Leblanc, X. Fang, R.E. Johnson, Y. Ma, W.-H. Ip, and L. Li, "Modiling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere", JGR (2013) in press. (pdf)

2012

Arridge, CS. et al., Mapping Magnetospheric Equatorial Regious at Saturn from Cassini Prime Mission Observations, Space Sci Rev 164 (1-4), pp. 1-83, DOI 10.1007/s11214-011- 9850-4 (2012).

Coates, A.J., A. Wellbrock, G.R. Lewis, C.S. Arridge, F.J. Crary, D.T. Young, M.F. Thomsen, D.B. Reisenfeld, E.C. Sittler Jr, R.E. Johnson, K. Szego, Z. Bebesi, G.H. Jones, Cassini in Titan's tail: CAPS observations of plasma escap, JGR (2012) in press. Elrod, M.K., W.-L. Tseng, R.J. Wilson, R.E. Johnson, Seasonal Variations Saturn's Plasma between the Main Rings and Enceladus, J. Geophysics Res 117, A03207, doi:10.1029/2011JA017332, 2012.(pdf)

Hartle, R.E., R.E. Johnson, E.C. Sittler Jr., M. Sarantos, and D.G. Simpson, Wind-induced atmospheric escape: Titan, GRL 39, L16210, doi:10.1029/2012GL052774, 2012 Hendrix, A.R., T.A. Cassidy, B.J. Buratti, C. Paranicas, C.J. Hansen, B. Teolis, E. Roussos, E.T. Bradley, P. Kollmann, R.E. Johnson, Mimas's far-UV albedo: Spatial variations, Icarus 220, 922-931 (2012).(pdf)

 Hendrix, A.R., T.A. Cassidy, B.J. Buratti, C. Paranicas, C.J. Hansen, B. Teolis,
                      E. Roussos, E.T. Bradley, P. Kollmann, R.E. Johnson, "Mimas's far-UV
                       albedo: Spatial variations" , Icarus 220, 922-931 (2012). (pdf)

Hill, T.W., M.F. Tohomasen, R.L. Tokar, A.J. Coates, G.R. Lewis, D.T. Young, F.J. Grary, R.A. Baragiola, R.E. Johnson, Y. Dong, R.J. Wilson, G.H. Jones, J.-E. Wahlund, D.G. Mitchell, and M. Horanyi, Charged nanograins in the Enceladus plume, JGR 117, A05209, doi:10.1029/2011JA017218, 2012.(pdf)

Paranicas, C., E. Roussor, N. Krupp, P. Kollmann, A.R. Hendrix, T. Cassidy, R.E. Johnson, P. Schenk, G. Jones, J. Carbary, D.G. Mitchell, K. Dialynas, Energetic charged partical weathering of Saturn's inner satellites, Planetary and Space Sci. 61, 60-65 (2012) .(pdf)

Tokar, R.L., R.E. Johnson, M.F. Thomsen, E.C. Sittler, A.J. Coates, R.J. Wilson, F.J. Crary, D.T. Young, and G.H. Jones, Detection of exospheric O2+ at Saturn's moon Dione, Geophys. Res. Letts 39, L03105, doi:10.1029/2011GL050452, 2012.(pdf)

Tucker, O.J., J.T. Erwin, J.I. Deighan, A.N. Volkov, R.E. Johnson, Thermally driven escape from Pluto's atmosphere: A combined fluid/kinetic model Icarus 217, 408-415 (2012). (pdf)

2011

Cassidy, T.A. and R.E. Johnson, A.R. Hendrix, Collisional Evolution of the Enceladus Neutral Cloud, 27th International Symp on Rarefied Gas Dynamics, AIP Conf. Proc. 1333, 1133-1138 (2011); doi: 10.1063/1.3562796.Cipriani, F, O. Witasse, F. Leblanc, R. Modolo, and R.E. Johnson, A model of interaction of Phobos' surface enviroment, Icarus 212, 643-648 (2011).(pdf)

Cipriani, F, O. Witasse, F. Leblanc, R. Modolo, and R.E. Johnson, "A model of interaction of Phobos' surface enviroment", Icarus 212, 643-648 (2011). (pdf)

Hendrix, A.R., T.A. Cassidy, R.E. Johnson, C. Paranicas, R.W. Carlson, Europa's diskresolved ultraviolet spectra: Relationships with plasma flux and surface terrains, Icarus 212, 736-743 (2011) (pdf)

Howett, C.J.A., J.R. Spencer, P. Schenk, R.E. Johnson, C. Paranicas, T.A. Hurford, A. Verbiscer, M. Segura, A high-amplitude thermal inertia anomaly of probable magnetospheric origin on Saturn's moon Mimas, Icarus 216, 221-226 (2011). (pdf)

Johnson, R.E., Photolysis and Radiolysis of Water Ice, Chapter 10 in Physics and Chemistry at Low Temperatures, L. Khriachtchev (Ed.) , World Scientific, Singapore, Published by Pan Stanford Publishing Pte. Ltd.. pp297-339. (2011) (pdf)

Rodriguez-Nieva, J.F., E.M. Bringa, T.A. Cassidy, R.E. Johnson, A. Coro, M. Fama, M.J. Loeffler, R.A. Baragiola,, and D. Farkas, SPUTTERING FROM A POROUS MATERIAL BY PENETRATING IONS, Astrophysical J. Letter 743:L5 (5pp), (2011). (pdf)

Schenk, P., D.P. Hamilton, R.E. Johnson, W.B. McKinnon, C. Paranicas, J. Schmidt, and M.R. Schowalter, Plasma, plumes and rings: Saturn system dynamics as recorded in global color patterns on its midsize icy satellites, Icarus 211, 740-757 (2011) (pdf)

Tseng, W-L, R. E. Johnson, M. F. Thomasen, T.A. Cassidy and Meredith K. Elrod, Neutral H2 and H2+ ions in the Saturnian magnetosphere, JGR 116, A03209, doi:10.1029/2010JA016145, (2011) (pdf)

Tucker, O.J., J.T. Erwin, R.E. Johnson, A.N. Volkov, T.A. Cassidy, Fluid/Kinetic Hybrid Simulation of Atmosphric Escape: Pluto, 27th Symposium on Rarefied Gas Dynamics, AIP Conf. Proc. 1333, 1145-1150 (2011), doi:10.1063/1.3562798. (pdf)

Volkov, A.N., R.E. Johnson, O.J. Tucker, J.T. Erwin, Thermally driven atmospheric escape: Transition from hydrodynamic to jeans escape, Astrophys. J. Lett. 729:L24 (5pp) (2011). doi:10.1088/2041-8205/729/2/L24 (pdf)

Volkov, A.N, O.J. Tucker, J.T. Erwin, R.E. Johnson, Kinetic simulations of thermal escape from a single component atmosphere, Phys. of Fluids 23, 066601 (2011). (pdf) (Supp material) (pdf))

Westlake, J.H., J.M. Bell, J.H. Waite, R.E. Johnson, J.G. Luhmann, K.E. Mandt, B.A. Magee, A.M. Rymer, Titan's thermospheric response to various plasma environments, JGR 116, A03318, doi:10.1029/2010JA016251, (2011). (pdf)

2010

Cassidy, T.A. and R.E. Johnson, Collisional Spreading of Enceladus' Neutral Cloud, Icarus 209, 696-703 (2010) (pdf)

Cassidy, T., P. Coll, F. Raulin, R.W. Carlson, R.E. Johnson, M.J. Loeffler, K.H. Hand, R.A. Baragiola, Radiolysis and photolysis of Icy Satellite Surfaces: Experiments and Theory, Space Sci Rev DOI 10.1007/s11214-009-9625-3 (2010). (Chapter in Exchange Processes in the Outer Solar System 2010). (pdf)

Coates, A.J., G.H. Jones, G.R. Lewis, A. Wellbrock, D.T. Young, F.J. Crary, R.E. Johnson, T.A. Cassidy, T.W. Hill, Negative ions in the Enceladus plume, Icarus 206, 618-622 (2010) (pdf)

Coates, A.J., A. Wellbrock, G.R. Lewis, G.H. Jones, D.T. Young, F.J. Crary, J.H. Waite, R.E. Johnson, T.W. Hill, E.C. Sittler Jr., Negative ions at Titan and Enceladus: recent results, Faraday Discussions 147, 293-305 (2010) (pdf)

Farrell, W.M., W.S. Kurth, R.L. Tokar, J.-E. Wahlund, D.A. Gurnett, Z. Wang, R.J. MacDowall, M.W. Morooka, R.E. Johnson, and J.H. Waite, Modification of the Plasma in the Near-Vicinity of Enceladus by the Enveloping Dust, GRL 37, L20202, doi:10.1029/2010GL044768 (2010) (pdf)

Johnson, R.E., "Thermally-Driven Atmospheric Escape", Astrophysical Journal 716:1573-1578, 2010. (dio:10.1088/004-637X/716/2/1573). Leblanc, F and R.R. Johnson, Mercury Exosphere: I Global Circulation Model of its sodium component, Icarus 209, 280-300 (2010). (pdf)

Leblanc, F and R.E. Johnson, "Mercury exosphere: I Global circulation model of its sodium component", Icarus 209, 280-300 (2010) . (pdf)

Paranicas, C., D.G. Mitchell, E. Roussos, P. Kollmann, N. Krupp, A.L. Müller, S.M. Krimigis, F.S. Turner, P.C. Brandt, A.M. Rymer, and R.E. Johnson, Transport of energetic electrons into Saturn's inner magnetosphere, JGR 115, A09214, doi:10.1029/2010JA015853 (2010)(pdf)   

Sittler, E.C. Jr., R.E. Hartle, R.E. Johnson, J.F. Cooper, A.S. Lipatov, C. Bertucci, A.J. Coates, K. Szego, M. Shappirio, D.G. Simpson, J.-E. Wahlund, Saturn's Magnetospheric interaction with Titan as defined by Cassini encounters T9 and T18: New Results, Planet. Space Sci.58, 327-350 (2010). (pdf)

Smith, H.T., R.E. Johnson, M.E. Perry, D.G. Mitchell, R.L. McNutt, D.T. Young, Enceladus plume variability and the neutral gas densities in Saturn's magnetosphere, Icarus JGR 115, A10252, doi:10.1029/2009JA015184 (2010) (pdf)

Teolis, B.D., G.H. Jones, P.F. Miles, R.L. Tokar, B.A. Magee, J.H. Waite, E. Roussos, D.T. Young, F.J. Crary, A.J. Coates, R.E. Johnson, W.-L. Tseng, R.A. Baragiola, "Cassini Finds an Oxygen-Carbon Dioxide Atmosphere an Saturn's Icy Moon Rhea", Science 330, 1813-1815 (2010). (pdf) (Supp material)

Tseng, W-.L., W.-H. Ip, R.E. Johnson, T.A. Cassidy, and M.K. Elrod, The Structure and time variability of the ring atmosphere and ionosphere, Icarus 206, 382-389 (2010) (pdf)

2009

Carlson, R.W., W.M. Calvin, J.B. Dalton, G.B. Hansen, R.L. Hudson, R.E. Johnson, T.B. McCord and M.H. Moore, "Europa's Surface Composition", Chapter in Europa, 7 Ed R. Pappalardo et al. pp283-327 (2009). (pdf)

Cassidy, T.A., R. Mendez, P. Arras, R.E. Johnson, and M.F. Skrutskie, "MASSIVE SATELLITES OF CLOSE-IN GAS GIANT EXOPLANETS", ApJ 704:1341-1347, 2009. (pdf)

Cassidy, T.A., R.E. Johnson, and O.J. Tucker, "Trace constituents of Europa's atmosphere", Icarus 201, 182-190 (2009). (pdf)

Cipriani, F., F. Leblanc, O. Witasse, and R.E. Johnson, "Exospheric signatures of alkali abundances in Europa's regolith", GRL 36, L12202, doi:10.1029/2009GL038939, 2009. . (pdf)

Cousteins, A. et al. "TandEM: Titan and Enceladus mission", Exp Astron 23, 893-946 (2009). DOI 10.1007/s10686-008-9103-z. (pdf)

Cuzzi, J., R. Clark, G. Filacchione, R. French, R. Johnson, E. Marouf, and L. Spilker, "Ring particle Composition and Size Distribution", Chapter 15 in Saturn from Cassini-Huygens (ed. M.K. Dougherty) pp 459-509 (2009). (pdf)

Farrell, W.M., W.S. Kurth, D.A. Gurnett, R.E. Johnson, M.L. Kaiser, J.-E. Wahlund, and J.H. Waite Jr., "Electron density dropout near Enceladus in the context of watervapor and water-ice", GRL 36, L10203, doi:10.1029/2008GL037108, 2009.(pdf)

Johnson, R.E., "Sputtering and heating of Titan's upper atmosphere", Phil. Trans. R. Soc. A (2009) 367,753-771, doi:10.1098/rsta.2008.0244.

Johnson, R.E., O.J. Tucker, M. Michael, E.C. Sittler, H.T. Smith, D.T. Young, and J.H. Waite, "Mass Loss Processes in Titan's Upper Atmosphere", Chapter 15 in Titan from Cassini-Huygens (eds. R.H. Brown et al) pp 373-391 (2009).

Johnson, R.E., M.H. Burger, T.A. Cassidy, F. Leblanc, M. Marconi, W.H. Smyth, "Composition and Detection of Europa's Sputter-Induced Atmosphere", Chapter in Europa, Eds. R. Pappalardo et al. pp507-527 (2009).

Jones, G.H. et al., "Fine jet structure of electrically charged grains in Enceladus' plume", GRL 36, L16204, doi:10.1029/2009GL038284, 2009.

Mauk, B.H., D.C. Hamilton, T.W. Hill, G.B. Hospodarsky, R.E. Johnson, C. Paranicas, E. Roussos, C.T. Russell, D.E. Shemansky, E.C. Sittler, R.M. Thorne, "Fundamental Plasma Processes in Saturn's Magnetosphere", Chapter 11 in Saturn from Cassini-Huygens (ed. M.K. Dougherty) pp281-331 (2009).

Paranicas, C, J.F. Cooper, H.B. Grarrett, R.E. Johnson, and S.J. Sturnet, "Europa's radiation environment and its effects on the surface", Chapter in Europa, 8 Eds. R. Pappalardo et al. pp529-544 (2009).

Schippers, P, N. André, R. E. Johnson, M. Blanc, I. Dandouras, A. J. Coates, S. M. Krimigis, and D. T. Young, "Identification of photoelectron energy peaks in Saturn's inner neutral torus", JGR 114, A12212, doi:10.1029/2009JA014368, 2009.

Schneider, N. M., M.H. Burger, E.L. Schaller, M.B. Brown, R.E. Johnson, J.S. Kargel, M.K. Dougherty, and N.A. Achilleos, "No Sodium in the vapour plumes of Enceladus", Nature 459,1102-1104 (2009).

Shah, M.B., C.J. Latimer, E.C. Montenegro, O.J. Tucker, R.E. Johnson, and H.T. Smith, "THE IMPLANTATION AND INTERACTIONS OF O+ IN TITAN'S ATMOSPHERE: LABORATORY MEASUREMENTS OF COLLISIONINDUCED DISSOCITION OF N2 AND MODELING OF POSITIVE ION FORMATION", ApJ 703:1947-1954, 2009.

Sittler, E.C. Jr., A. Ali, J.F. Cooper, R.E. Hartle, R.E. Johnson, A.J. Coates, D.T. Young, "Heavy ion formation in Titan's ionosphere: Magnetospheric introduction of free oxygen and a source of Titan's aerosols?", Planetary and Space Science 57, 1547-1557 (2009).

Smith, H.T., D.G. Mitchell, R.E. Johnson, and C.P. Paranicas, "Investigation of energetic proton penetration in Titan's atmosphere using the Cassini INCA instrument", Plant. & Space Sci. 57, 1538-1546 (2009).

Tokar, R.L., R.E. Johnson, M.F. Thomsen, R.J. Wilson, D.T. Young, F.J. Crary, A.J. Coates, G.H. Jones, and C.S. Paty, "Cassini detection of Enceladus' cold water-group plume ionosphere", GRL 36, L13203, doi:10.1029/2009GL038923, 2009.

Tucker, O.J., and R.E.Johnson, "Thermally driven atmospheric escape: Monte Carlo simulations for Titan's atmosphere", Planetary Space Sci. 57, 1889-1894 (2009).

2008

Cassidy, T.A., R.E. Johnson, P.E. Geissler, F. Leblanc, " Simulation of Na D Emission near Europa during eclipse", JGR 113, doi:10.1029/2007E002955, (2008).

Cipriani, F., F. Leblanc, O. Witasse, and R.E. Johnson, "Sodium recycling at Europa: what do we learn from the sodium cloud variability", GRL 35, L19201, doi:10.1029/2008GL035061, 2008.

Fox, J.L., M.I. Galand, R.E. Johnson, "Energy Deposition in Planetary Atmospheres by Charged Particles and Solar Photons", Space Science Rev 139: 3-62 9 DOI 10.1007/s11214-008-9403-7 (2008).

Hendrix, A.R., R.E. Johnson, "Callisto: New insights from Galileo disk-resolved UV Measurements", Astrophys. Journal 687, 706-713 (2008).

Huestis, D.L., S.W. Bougher, J.L. Fox, M.Galand, R.E. Johnson, J.I. Moses, J.C. Pickering, "Cross Section and Reaction Rates for Comparative Planetary Aeronomy", Space Sci Rev 139: 63-105, DOI 10.1007/s11214-008-9383-7 (2008).

Johnson, R.E. et al. "Exospheres and Atmospheric Escape", Chapter in Comparative Aeronomy, Ed. A. Nagy, Space Sci Rev 139: 355-397, DOI 10.1007/s11214-008-9415-3 (2008).

Johnson, R.E., M. Fama et al, "Sputtering of Ice Grains and Icy Satellites in Saturn's Inner Magnetosphere", Planet. & Space Sciences 56, 1238-1243 (2008).

Jones, G.H., "The Dust Halo of Saturn's Largest Icy Moon, Rhea", Science 319, 1380-1384 (2008).

Lammer, H, J.F. Kasting, E. Chassefiere, R.E. Johnson, Y.N. Kulikov, F. Tian, "Atmospheric Escape and Evolution of Terrestrial Planets and Satellites", Space Sci Rev 139: 399-436, DOI 10.100/s11214-008-9413-5 (2008).

Martens, H.R., D.B. Reisenfeld, J.D. Wolliams, R.E. Johnson and H.T. Smith, "Observations of Molecular Oxygen ions in Saturn's inner magnetosphere", GRL 35, L20103, doi:10.1029/2008GL035433, 2008.

Paranicas, C., D.G. Mitchell, S.M. Krimigis, D.C. Hamilton, E. Roussos, N. Krupp, G.H. Jones, R.E. Johnson, J.F. Cooper, T.P. Armstrong, "Source and losses of energetic protons in Saturn's magnetosphere", Icarus 197, 519-525 (2008).

Sittler, E.C., N. Andre, M. Blanc, M. Burger, R.E. Johnson, A. Coates, et al. " Ion and neutral sources and sinks within Saturn's inner magnetosphere: Cassini results", Plant. Space Sci. 56, 3-18 (2008).

Smith, H.T., M. Shappirio, R.E. Johnson, D. Reisenfeld, E.C. Sittler, F.J. Crary, D.J. McComas, D.T. Young, "Enceladus: a source of ammonia products and molecular nitrogen for Saturn's mognetosphere", JGR 113, A11206,
doi:10.1029/2008JA013352, 2008.

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2007 - 2001 | 1986 - 2000 | prior to 1986