Efecto del gas nebular sobre la dinámica de un proto planeta joviano

CIONCO, R. G; BRUNINI, A.

Rosario, Septiembre, 1999,

Congreso; 43 Reunión Anual de la Asociación Argentina de Astronomía (AAA43; 1999

Observatorio y Planetario UN-Rosario

In order to describe a realist scenario to investigate the formation of giant planets, we analyze the physical structure of the primordial gaseous circumsolar disk, the environment where protoplanets growth. We calculate the gas drag efect onto embrios of 1 M⊕ at 5.2 AU with a new formulation of the dinamycal friction effect. We have found a strong radial migration of the protoplanet, that, in comparison whith the predictions of other formulations of gas drag is, at least, one order of magnitude larger. This result casts doubts about the possible survival of these kinds of planetary embrios. The implications for the modelling of the planetary systems are discussed.