Science - Planetary Science: People: Joseph Ajello

Jet Propulsion Laboratory (1971-Present)
- Senior Research Scientist
- Principal Investigator:
  - Planetary Atmospheres
  - Space Astrophysics Research and Analysis
  - Space Physics and Exobiology
  - Air Force Office of Scientific Research
- Co-investigator:
- Guest Investigator:
- Experiment Representative to the UV Spectrometer Teams of Voyager and Mariner 9
- Team Leader Ultraviolet Emission Processes Group
Lecturer California Polytechnic State University for Department of Physics

Ajello, J. M., Mangina, R., and Strickland, D., Laboratory Studies of UV Emissions from Proton Impact on N₂ for Aurora analysis: the Lyman-Birge-Hopfield Band System, [pdf] J. Geophsys. Res., (2010a, in press).
Ajello, Joseph M., Rao S. Mangina and R. R. Meier, UV Molecular Spectroscopy from Electron Impact for Applications to Planetary Atmospheres and Astrophysics Book chapter 30, published in "Charged Particle and Photon Interactions with Matter" Recent Advances, Applications, and Interfaces-Eds., [pdf] Y. Hatano, Y. Katsumura, and A. Mozumder, Taylor & Francis, Boca Raton (2010b, in press).
Young, J. A., Malone, C. P., Johnson, P. V., Ajello, J. M., Liu, X., and Kanik. Lyman-Birge-Hopfield emissions from electron impact excited N₂. [pdf] J. Phys. B: At. Mol. Opt. Phys. (2010, in press).
Ajello, J., W. Pryor, L. Esposito, I. Stewart, W. McClintock, J. Gustin, D. Grodent, J.-C. Gérard and J. Clarke, "The Cassini Campaign Observations of the Jupiter Aurora by the Ultraviolet Imaging Spectrograph and the Space Telescope Imaging Spectrograph," Icarus, In press (2005)
Esposito, L et al., (Cassini UVIS Team), "Ultraviolet Imaging Spectroscopy Shows and Active Saturnian System," Science, 307, 1251 (2005)
Liu, X., D. E. Shemanksy, M. Ciocca, I. Kanik, J. M. Ajello, "Analysis of the Physical Properties of the N₂ c' ¹Σ_+u(0)- X ¹Σ_+g(0) transition," Ap. J. 623, 579 (2005)
Ajello, J., P. Vatti Palle, H. Abgrall, E. Roueff, A. Bhardwaj and J. Gustin, "The Electron Excited UV Spectrum of HD: Cross Sections and Transition Probabilities," Astrophys. J. Supp, 159, 314 (2005)
J. Gustin, P.D. Feldman, J.-C. Gérard, A. Vidal-Madjar, L. Ben Jaffel, D. Grodent, H.W. Moos, D.J. Sahnow, H.A. Weaver, B.C. Wolven and J.M. Ajello, "Jovian Auroral Spectroscopy with FUSE:Analysis of Self-Absorption and Implications on Electron Precipitation," Icarus, 171, 336 (2004)
Geissler, P., A. McEwen, C. Porco, D. Strobel, J. Soar, J. Ajello and R. West, "Cassini Observations of Io's Visible Aurora," Icarus, 172, 127 (2004)
Gladstone, G. R,, W. R. Pryor, W. K. Tobiska, A.I.F. Stewart, K.E. Simmons and J. M. Ajello, "Constraints on Jupiters Hydrogen Corona from Galileo UVS Observations," Planetary Space Sciences, 52, 415 (2004)
Vattipalle, J. Ajello, and A. Bhardwaj, "The High Resolution Spectrum of Electron-Excited SO2," J. Geophys. Res., 109, A02310,10.1029/2003JA009828 (2004)
Terrell, C., D. Hansen, and J. Ajello, "The Middle Ultraviolet and Visible Spectrum of O₂ by Electron Impact," J. Phys. B., 37, 1931 (2004)
Makarov, O., I. Kanik, J. M. Ajello, and V. Prahlad, "Kinetic Energy Distributions and Line Profile Measurements of Dissociation Products of Water upon Electron Impact," J. Geophys. Res., 109, A09303, doi 10.1029/2002JA009353 (2004)
Liu, X., D. E. Shemansky, S. Ahmed, J. Ajello, H. Abgrall, and E. Roueff, "Resonance Excitation of a Single Ro-vibrational Level of H2 B ¹Σ_u⁺ State and the Effective Excitation Function of the EF ¹Σ_g⁺- X ¹Σ_g⁺ Band System," J. Phys. B: At. Mol. Phys., 36, 173 (2003)
Kanik, I. Noren, C., O. Makarov, P. Vatti Palle, J. Ajello and D. Shemansky, "Electron Impact Dissociative Excitation of O2. II. Absolute Emission Cross Sections of OI(130.4 nm) and OI(135.6 nm)," J. Geophys. Res., 108, E11,51256,doi:10.1029/2000JE001423 (2003)
Makarov, O., I. Kanik, J. Ajello and C. Noren, "Electronic Impact Dissociative Excitation of O2. I. Kinetic Energy Distributions of Fast Oxygen Atoms," J. Geophys. Res., 108, E11,5125,doi:10.1029/2000JE001422 (2003)