PTYS/LPL Faculty

Gilda Ballester


  • David K. Sing
  • Walt Harris
  • Daniel Rego
  • Yoo-Jea Kim
Gilda Ballester
Senior Research Scientist
Planetary atmospheres
Ph.D., 1989, Johns Hopkins University

Sonett  #145

Years with LPL:  2000


Characterization of exoplanets with transit observations at UV, optical and near-IR wavelengths with the Hubble Space Telescope and through collaborative ground-based observations (e.g., Gran Telescopio Canarias). The research focuses on the properties of both the upper and lower atmospheres of hot Jupiters and low-density super Earths. Early research on Io's atmosphere and plasma torus, and on the upper atmospheres, auroras and magnetospheric interactions of Jupiter, Saturn and Uranus with both imaging and spectroscopy. Current collaborations with researchers at IAP (France), U. of Exeter, INTA (Spain), Tsinghua U. (China), Tennessee State, U. Santa Cruz, U. of Arizon, CfA, Caltech, other.

CV for Dr. Ballester (PDF)


Ben-Jaffel, L., Ballester, G. E. Transit of Exomoon Plasma Tori: New Diagnosis 2014ApJ...785L..30B

Wilson, P. A., et al. A search for methane in the atmosphere of GJ 1214b via GTC narrow-band transmission spectrophotometry 2014MNRAS.438.2395W

Nikolov, N., et al. Hubble Space Telescope hot Jupiter transmission spectral survey: a detection of Na and strong optical absorption in HAT-P-1b 2014MNRAS.437...46N

Sing, D. K., et al. HST hot-Jupiter transmission spectral survey: evidence for aerosols and lack of TiO in the atmosphere of WASP-12b 2013MNRAS.436.2956S

Vidal-Madjar, A., et al. Magnesium in the atmosphere of the planet HD 209458 b: observations of the thermosphere-exosphere transition region 2013A&A...560A..54V

Wakeford, H. R., et al. HST hot Jupiter transmission spectral survey: detection of water in HAT-P-1b from WFC3 near-IR spatial scan observations 2013MNRAS.435.3481W

Huitson, C. M., et al. An HST optical-to-near-IR transmission spectrum of the hot Jupiter WASP-19b: detection of atmospheric water and likely absence of TiO 2013MNRAS.434.3252H

Ben-Jaffel, L., Ballester, G. E. Hubble Space Telescope detection of oxygen in the atmosphere of exoplanet HD 189733b 2013A&A...553A..52B

Bourrier, V., et al. Atmospheric escape from HD 189733b observed in H I Lyman-α: detailed analysis of HST/STIS September 2011 observations 2013A&A...551A..63B

Lecavelier des Etangs, A., et al. Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b 2012A&A...543L...4L

Huitson, C. M., et al. Temperature-pressure profile of the hot Jupiter HD 189733b from HST sodium observations: detection of upper atmospheric heating 2012MNRAS.422.2477H

Lamy, L., et al. Earth-based detection of Uranus' aurorae 2012GeoRL..39.7105L

Sing, D. K., et al. Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry 2011A&A...527A..73S

Lecavelier Des Etangs, A., et al. Evaporation of the planet HD 189733b observed in H I Lyman-α 2010A&A...514A..72L

Sing, D. K., et al. Transit spectrophotometry of the exoplanet HD 189733b. I. Searching for water but finding haze with HST NICMOS 2009A&A...505..891S

Sing, D. K., et al. Determining Atmospheric Conditions at the Terminator of the Hot Jupiter HD 209458b 2008ApJ...686..667S

Sing, D. K., et al. Hubble Space Telescope STIS Optical Transit Transmission Spectra of the Hot Jupiter HD 209458b 2008ApJ...686..658S

Ehrenreich, D., et al. New observations of the extended hydrogen exosphere of the extrasolar planet HD 209458b 2008A&A...483..933E

Vidal-Madjar, A., et al. Exoplanet HD 209458b (Osiris): Evaporation Strengthened 2008ApJ...676L..57V

Sing, D. K., et al. Clouds on the Dark Side of an Extrasolar Hot-Jupiter: Detailed Transit Analysis of Atmospheric Sodium in HD209458b 2008ASPC..398..379S

Tinetti, G., Vidal-Madjar, et al. Water vapour in the atmosphere of a transiting extrasolar planet 2007Natur.448..169T

Ballester, G. E., Sing, D. K., Herbert, F. The signature of hot hydrogen in the atmosphere of the extrasolar planet HD 209458b 2007Natur.445..511B

Ben-Jaffel, L., et al. Predictions on the application of the Hanle effect to map the surface magnetic field of Jupiter 2005Icar..178..297B

Emerich, C., Ben Jaffel, L., Clarke, J. T., Ballester, G. Hot Hydrogen in the Jovian Corona 2005HiA....13..917E

Désert, J.-M., et al. The Data Analysis of the HD 209458b Transit in Lyα 2004ASPC..321..205D

Jessup, K. L., et al. The atmospheric signature of Io's Prometheus plume and anti-jovian hemisphere: evidence for a sublimation atmosphere 2004Icar..169..197J

Vidal-Madjar, A., et al. Detection of Oxygen and Carbon in the Hydrodynamically Escaping Atmosphere of the Extrasolar Planet HD 209458b 2004ApJ...604L..69V

Vidal-Madjar, A., et al. An extended upper atmosphere around the extrasolar planet HD209458b 2003Natur.422..143V

Clarke, J. T., et al. Ultraviolet emissions from the magnetic footprints of Io, Ganymede and Europa on Jupiter 2002Natur.415..997C

Herbert, F., Gladstone, G. R., Ballester, G. E. Extreme Ultraviolet Explorer spectra of the Io plasma torus: Improved spectral resolution and new results 2001JGR...10626293H

Miller, S., et al. The role of H+3 in planetary atmospheres 2000RSPTA.358.2485M

Jessup, K. L., Clarke, J. T., Ballester, G. E., Hammel, H. B. Ballistic Reconstruction of HST Observations of Ejecta Motion Following Shoemaker-Levy 9 Impacts into Jupiter 2000Icar..146...19J

Spencer, J. R., Jessup, K. L., McGrath, M. A., Ballester, G. E., Yelle, R. Discovery of Gaseous S2 in Io's Pele Plume 2000Sci...288.1208S

Vincent, M. B., et al. Jupiter's Polar Regions in the Ultraviolet as Imaged by HST/WFPC2: Auroral-Aligned Features and Zonal Motions 2000Icar..143..205V

Vincent, M. B., et al. Mapping Jupiter's Latitudinal Bands and Great Red Spot Using HST/WFPC2 Far-Ultraviolet Imaging 2000Icar..143..189V

Feldman, P. D., et al. Lyman-α imaging of the SO2 distribution on Io 2000GeoRL..27.1787F

Trafton, L. M., Miller, S., Geballe, T. R., Tennyson, J., Ballester, G.E. H2 Quadrupole and H+3 Emission from Uranus: The Uranian Thermosphere, Ionosphere, and Aurora 1999ApJ...524.1059T

Stallard, T., Miller, S., Ballester, G. E., Rego, D., Joseph, R. D., Trafton, L. M. The H+3 Latitudinal Profile of Saturn 1999ApJ...521L.149S

Evans, R. W., et al. Asteroid Trails in Hubble Space TelescopeWFPC2 Images: First Results 1998Icar..131..261E

Trauger, J. T., et al. Saturn's hydrogen aurora: Wide field and planetary camera 2 imaging from the Hubble Space Telescope 1998JGR...103.0237T

Clarke, J. T., et al. Hubble Space Telescope imaging of Jupiter's UV aurora during the Galileo orbiter mission 1998JGR...103.0217C

Ben Jaffel, L., et al. The Lyman α Bulge of Jupiter & the Auroral-Equatorial Regions Coupling 1998ESASP.413...53B

Ballester, G. E. Magnetospheric Interactions in the Major Planets 1998ESASP.413...21B

Miller, S., et al. Mid-to-Low Latitude H +3Emission from Jupiter 1997Icar..130...57M

Spencer, J. R., et al. Pele plume (Io): Observations with the Hubble Space Telescope 1997GeoRL..24.2471S

Prangé, R., et al. Detection of Self-reversed Lyα Lines from the Jovian Aurorae with the Hubble Space Telescope 1997ApJ...484L.169P

Lam, H. A., et al. Variation in the H+3 Emission of Uranus 1997ApJ...474L..73L

Ballester, G. E., et al. Time-Resolved Observations of Jupiter's Far-Ultraviolet Aurora 1996Sci...274..409B

Clarke, J. T., et al. Far-Ultraviolet Imaging of Jupiter's Aurora and the lo "Footprint" 1996Sci...274..404C

Emerich, C., et al. Evidence for Supersonic Turbulence in the Upper Atmosphere of Jupiter 1996Sci...273.1085E

Prange, R., et al. Auroral Signature of Comet Shoemaker-Levy 9 in the Jovian Magnetosphere 1995Sci...267.1317P

Clarke, J. T., et al. HST Far-Ultraviolet Imaging of Jupiter During the Impacts of Comet Shoemaker-Levy 9 1995Sci...267.1302C

Holtzman, J. A., et al. The performance and calibration of WFPC2 on the Huble Space Telescope 1995PASP..107..156H

Harris, W. M., et al. An early report on IUE observations of the impact of Comet Shoemaker-Levy with Jupiter 1995HiA....10..636H

Clarke, J. T., et al. Hubble Space Telescope far-ultraviolet imaging of Jupiter during the impacts of Comet Shoemaker-Levy 9 1995HiA....10..626C

Miller, S., et al. The effect of the impact of comet Shoemaker Levy-9 on Jupiter's aurorae 1995GeoRL..22.1629M

Achilleos, N., et al. Post-SL9 impact brightness imbalance in the Jovian aurorae. 1995ESOC...52..375A

Prangé, R., et al. Far UV spectra and images of cometary impacts on Jupiter observed with IUE and HST. 1995ESOC...52..191P

Trauger, J. T., et al. The on-orbit performance of WFPC2 1994ApJ...435L...3T

Ballester, G. E., Miller, S., Tennyson, J., Trafton, L. M., Geballe, T. R. Latitudinal temperature variations of Jovian H3(+) 1994Icar..107..189B

Prange, R., et al. Correlated variations of UV and radio emissions during an outstanding Jovian auroral event 1993JGR....9818779P

McGrath, M. A., Feldman, P. D., Strobel, D. F., Moos, H. W., Ballester, G. E. Detection of O II 2471-A forbidden line from the Io plasma torus 1993ApJ...415L..55M

Trafton, L. M., Geballe, T. R., Miller, S., Tennyson, J., Ballester, G. E. Detection of H3(+) from Uranus 1993ApJ...405..761T

Baron, R., et al. Imaging Jupiter's aurorae from H3(+) emissions in the 3-4 micron band 1991Natur.353..539B

Ballester, G. E., Strobel, D. F., Moos, H. W., Feldman, P. D. The atmospheric abundance of SO2 on Io1990Icar...88....1B

McGrath, M. A., Ballester, G. E., Moos, H. W. Jovian H2 dayglow emission (1978-1989) 1990JGR....9510365M

McGrath, M. A., Feldman, P. D., Ballester, G. E., Moos, H. W. IUE observations of the Jovian dayglow emission 1989GeoRL..16..583M

Livengood, T. A., Moos, H. W., Ballester, G. E. Phenomenological analysis of Jovian north auroral H2 Lyman band emissions 1988ESASP.281a..97L

McGrath, M. A., Moos, H. W., Ballester, G. E., Coplin, K. A. Jovian equatorial H2 emission from 1979-1987 1988ESASP.281a..89M

Ballester, G. E., et al. Io: IUE observations of its atmosphere and the plasma torus 1988ESASP.281a..79B

Skinner, T. E., et al. Temporal variation of the Jovian H I Lyman alpha emission (1979-1986) 1988JGR....93...29S

Ballester, G. E., et al. Detection of neutral oxygen and sulfur emissions near Io using IUE 1987ApJ...319L..33B

Skinner, T. E., Moos, H. W., Ballester, G. E. The spatial dependence of the Jovian auroral emissions 1984NASCP2349..497S