Gravitational systems with variable mass : galaxy merger / Sistemas gravitacionais com massa variavel : merger de galaxias

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

We study the process of galactic merger, where galaxies are regarded as compact objects with time-dependent masses. This study is made through the analysis of the system s orbit. For this purpose, we consider the gravitational problem of two bodies exchanging mass with a surrounding atmosphere. The Gylden-Mestschersky problem is reviewed in order to be used as a reference for that problem. We propose some models of mass variation, based on a hydrodynamics analogy and on a microscopic analysis of the system. The two-body problem considered is applied to the three-boby problem of varying masses. We found stationary solutions corresponding to the ones of the usual constant masses problem

ASSUNTO(S)

variable mass two-body problem three bodies problem problema de dois corpos massa variavel problema de tres corpos

ACESSO AO ARTIGO

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