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Theory for planetary exospheres: III. Radiation pressure effect on the Circular Restricted Three Body Problem and its implication on planetary atmospheres

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Title: Theory for planetary exospheres: III. Radiation pressure effect on the Circular Restricted Three Body Problem and its implication on planetary atmospheres
Authors: Beth, AA
Garnier
Toublanc
Dandouras
Mazelle
Item Type: Journal Article
Abstract: The planetary exospheres are poorly known in their outer parts, since the neutral densities are low compared with the instruments detection capabilities. The exospheric models are thus often the main source of information at such high altitudes. We present a new way to take into account analytically the additional effect of the stellar radiation pressure on planetary exospheres. In a series of papers, we present with a Hamiltonian approach the effect of the radiation pressure on dynamical trajectories, density profiles and escaping thermal flux. Our work is a generalization of the study by Bishop and Chamberlain (1989). In this third paper, we investigate the effect of the stellar radiation pressure on the Circular Restricted Three Body Problem (CR3BP), called also the photogravitational CR3BP, and its implication on the escape and the stability of planetary exospheres, especially for hot Jupiters. In particular, we describe the transformation of the equipotentials and the location of the Lagrange points, and we provide a modified equation for the Hill sphere radius that includes the influence of the radiation pressure. Finally, an application to the hot Jupiter HD 209458b reveals the existence of a blow-off escape regime induced by the stellar radiation pressure.
Issue Date: 9-Jul-2016
Date of Acceptance: 30-Jun-2016
URI: http://hdl.handle.net/10044/1/34603
DOI: https://dx.doi.org/10.1016/j.icarus.2016.06.028
ISSN: 1090-2643
Publisher: Elsevier
Start Page: 415
End Page: 423
Journal / Book Title: Icarus
Volume: 280
Copyright Statement: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council [2006-2012]
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/K001051/1
ST/K001051/1
ST/N000692/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Atmosphere, dynamics
Celestial mechanics
Solar radiation
Extra-solar planets
3-BODY PROBLEM
HOT JUPITERS
HD 209458B
ESCAPE
MODELS
EVOLUTION
AERONOMY
SYSTEMS
STAR
astro-ph.EP
0201 Astronomical And Space Sciences
0402 Geochemistry
0404 Geophysics
Publication Status: Published
Appears in Collections:Space and Atmospheric Physics
Physics
Faculty of Natural Sciences



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