HR: 10:50h
AN: P51F-03    [PDF]
TI: Is Hydrodynamic Escape from Small Orbit Extrasolar Planets Fast or Slow? New Solution of Hydrodynamic Equations and Its Applications
AU: * Toon, O B
EM: btoon@lasp.colorado.edu
AF: LASP/University of Colorado at Boulder, Campus Box 392, University of Colorado, Boulder, CO 80309
AU: De Sterck, H
EM: desterck@colorado.edu
AF: Department of Applied Mathematics, University of Colorado at Boulder, Campus Box 526, University of Colorado, Boulder, CO 80309
AU: Tian, F
EM: tian@colorado.edy
AF: LASP/University of Colorado at Boulder, Campus Box 392, University of Colorado, Boulder, CO 80309
AU: Pavlov, A A
EM: pavlov@lasp.colorado.edu
AF: LASP/University of Colorado at Boulder, Campus Box 392, University of Colorado, Boulder, CO 80309
AB: Hydrodynamic escape has important applications in the formation and evolution of planetary atmospheres. Solutions to the time-independent hydrodynamic equations are difficult to find due to the existence of a singularity point. New method to solve time-dependent hydrodynamic equations is developed and validated. When applied to extrasolar planets under intense radiation from parent stars (HD209458b), we tried to answer the following 2 questions: 1) are these planets undergoing hdyrodynamic escape; 2) how fast are they losing their mass. Simulation results are compared with observations.
DE: 0325 Evolution of the atmosphere
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
SC: Planetary Sciences [P]
MN: 2003 Fall Meeting