HR: 15:45h
AN: SA24A-02    [Abstracts]
TI: Using HST-STIS Observations of Auroral Lyα Line Profiles to Map High-Altitude Winds on Jupiter
AU: * Gladstone, R
EM: rgladstone@swri.edu
AF: Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238-5166 United States
AU: Majeed, T
EM: tariqm@umich.edu
AF: University of Michigan, 2455 Hayward Avenue, Ann Arbor, MI 48109-2143 United States
AU: Majeed, T
EM: tariqm@umich.edu
AF: Department of Physics, American University, Sharjah, United Arab Emirates
AU: Bougher, S
EM: bougher@umich.edu
AF: University of Michigan, 2455 Hayward Avenue, Ann Arbor, MI 48109-2143 United States
AU: Waite, H
EM: hunterw@umich.edu
AF: University of Michigan, 2455 Hayward Avenue, Ann Arbor, MI 48109-2143 United States
AU: Clarke, J
EM: jclarke@bu.edu
AF: Boston University, 725 Commonwealth Avenue, Boston, MA 02215 United States
AB: We present an analysis of several high-resolution long-slit echelle spectra of Jupiter's auroral Lyα emissions obtained by HST-STIS during the Cassini flyby of 12/2000-1/2001. We apply a velocity shear resonance line radiative transfer code to extract high-altitude wind velocities, using an asymmetry produced when the emergent self-reversed Lyα emission line is scattered by fast-moving H atoms high above the aurora. The neutral velocities thus extracted are complementary to the ion winds obtained by observations of Doppler-shifted auroral near-IR H₃⁺ emissions, and provide constraints for the Jupiter Thermosphere General Circulation Model (JTGCM). The results highlight how Jupiter's aurora affect upper atmospheric dynamics on a global scale.
DE: 0310 Airglow and aurora
DE: 5707 Atmospheres--structure and dynamics
DE: 6220 Jupiter
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly