Computation of the Transmitted and Polarized Scattered Fluxes by the Exoplanet HD 189733b in X-Rays

0484630 - ASÚ 2018 RIV US eng J - Článek v odborném periodiku
Marin, Frederic - Grosso, N.
Computation of the Transmitted and Polarized Scattered Fluxes by the Exoplanet HD 189733b in X-Rays.
Astrophysical Journal. Roč. 835, č. 2 (2017), 283/1-283/13. ISSN 0004-637X. E-ISSN 1538-4357
Grant CEP: GA MŠMT(CZ) 7E13012
GRANT EU: European Commission(XE) 312789 - STRONGGRAVITY
Grant ostatní: COST Action(XE) MP1104
Institucionální podpora: RVO:67985815
Klíčová slova: planetary systems * radiative transfer * stars individual HD 189733
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.551, rok: 2017

We run Monte-Carlo radiative transfer simulations to estimate the amount of X-ray flux reprocessed by HD. 189733b.. Despite its extended evaporating. atmosphere, we find that the X-ray absorption radius of HD. 189733b at 0.7 keV, which is. the mean energy of the photons detected in the 0.25-2 keV energy band by XMM-Newton, is similar to 1.01 times the planetary radius for an atmosphere of atomic hydrogen and helium (including ions), and produces a maximum depth of similar to 2.1% at similar to +/- 46. minutes from the center of the planetary transit on the geometrically thick and optically thin corona. We compute numerically in the 0.25-2 keV energy band that this maximum depth is only of similar to 1.6% at similar to +/- 47. minutes. from the transit center, and not very sensitive to the metal abundance, assuming that adding metals in the atmosphere would not dramatically change the density-temperature profile.
Trvalý link: http://hdl.handle.net/11104/0279793