Terrestrial planets across space and time

摘要: The study of cosmology, galaxy formation and exoplanets has now advanced to a stage where cosmic inventory terrestrial planets may be attempted. By coupling semi-analytic models recipe that relates the occurrence mass metallicity their host stars, we trace population around both solar-mass (FGK type) lower-mass (M dwarf) stars throughout all history. We find mean age in local Universe is $7\pm{}1$ Gyr for FGK hosts $8\pm{}1$ M dwarfs. estimate hot Jupiters have depleted by no more than $\approx 10\%$, only 10\%$ at current epoch are orbiting range which such yet confirmed. typical planet located spheroid-dominated with total stellar comparable Milky Way. When looking whole observable Universe, argue 1\times 10^{19}$ 5\times 10^{20}$ respectively. Due light travel time effects, on our past cone exhibit just $1.7\pm 0.2$ Gyr. These results discussed context habitability, Copernican principle searches extraterrestrial intelligence cosmological distances.