N-body models of the Gould's Belt

The kinematics of the Gould's belt system is investigated using the data available from the Hipparcos catalogue. Its rotation and expansion is given with the values of the galactic rotation parameters B = -23 km s^{-1}kpc^{-1} and K = +12 km s^{-1}kpc^{-1}. It is suggested that this system was born about 30 Myr ago with an angular momentum too large to be gravitationally bound. N-body models are used to explain the observed values of galactic rotation parameters, to estimate its total mass, as well as to interpret the flatness of this inclined system of gas and young stars.