Cartographie d'exo-terres

Scattered light from terrestrial exoplanets provides valuable
information about the planetary surface. Applying the surface
reconstruction method proposed by Fujii et al. (2010) to both diurnal
and annual variations of the scattered light, we develop a
reconstruction method of land distribution with both longitudinal and
latitudinal resolutions. We find that one can recover a global map of
an idealized Earth-like planet without clouds on a face-on circular
orbit. Using the dependence of light curves on the planetary obliquity,
we also show that the obliquity can be measured by adopting the
chi-square minimization or the extended information criterion. We
demonstrate a feasibility of our methodology by applying it to a
multi-band photometry of a cloudless model Earth with future space
missions such as the occulting ozone observatory (O3). We conclude that
future space missions can estimate both the surface distribution and
the obliquity at least for cloudless Earth-like planets within $\sim$ 5
- 10 pc.

Stalker a écrit:Je pense que l'option 1 pixel est largement suffisante si on peut avoir un bon contraste. Par contre l'E-ELT ça sera plus proche de 3 pixels