The Earth as an extrasolar transiting planet - II: HARPS and UVES detection of water vapor, biogenic O${}_2$, and O${}_3$

Luc Arnold, David Ehrenreich, Alfred Vidal-Madjar +9

The atmospheric composition of transiting exoplanets can be characterized during transit by spectroscopy. For the transit of an Earth twin, models predict that biogenic $O_2$ and $…