Artículo
Photoionization of planetary winds: Case study HD 209458b
Schneiter, Ernesto Matías
; Esquivel, A.; Villarreal D'angelo, Carolina Susana
; Velázquez, P. F.; Raga, A. C.; Costa, Andrea
Fecha de publicación:
04/2016
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
e-ISSN:
1365-2966
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Close-in hot Jupiters are exposed to a tremendous photon flux that ionizes the neutral escaping material from the planet leaving an observable imprint that makes them an interesting laboratory for testing theoretical models. In this work, we present 3D hydrodynamic simulations with radiation transfer calculations of a close-in exoplanet in a blow-off state. We calculate the Ly α absorption and compare it with observations of HD 209458b and previous simplified model results. Our results show that the hydrodynamic interaction together with a proper calculation of the photoionization process are able to reproduce the main features of the observed Ly α absorption, in particular at the blue-shifted wings of the line. We found that the ionizing stellar flux produce an almost linear effect on the amount of absorption in the wake. Varying the planetary mass-loss rate and the radiation flux, we were able to reproduce the 10 per cent absorption observed at -100 km s-1.
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Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Schneiter, Ernesto Matías; Esquivel, A.; Villarreal D'angelo, Carolina Susana; Velázquez, P. F.; Raga, A. C.; et al.; Photoionization of planetary winds: Case study HD 209458b; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 457; 2; 4-2016; 1666-1674
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