Evolution of protoplanetary disks: constraints from DM Tauri and GM Aurigae

Ricardo Hueso (1) , Tristan Guillot (2)

1 Fisica Aplicada I., E.T.S. Ing.
2 CASSIOPEE - Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides

We present a one-dimensional model of the formation and viscous evolution of protoplanetary disks. The formation of the early disk is modeled as the result of the gravitational collapse of an isothermal molecular cloud. The disk's viscous evolution is integrated according to two parameterizations of turbulence: the classical alpha representation and a beta parameterization, representative of non-linear turbulence driven by the keplerian shear. We apply the model to DM Tau and GM Aur, two classical T-Tauri stars with relatively well-characterized disks, retrieving the evolution of their surface density with time. We perform a systematic Monte-Carlo exploration of the parameter space (i.e. values of the alpha-beta parameters, and of the temperature and rotation rate in the molecular cloud) to find the values that are compatible with the observed disk surface density distribution, star and disk mass, age and present accretion rate. We find that the observations for DM Tau require 0.001

Mots clés: accretion; accretion disks; solar system: formation; planetary systems: formation; planetary systems: protoplanetary disks; accretion disks -solar system; formation -planetary systems; formationplanetary systems; protoplanetary disks

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

Ricardo Hueso, Tristan Guillot. Evolution of protoplanetary disks: constraints from DM Tauri and GM Aurigae. Astronomy and Astrophysics - A&A, 2005, 442, pp.703-725. ⟨10.1051/0004-6361:20041905⟩. ⟨hal-00113470⟩