The formation of terrestrial planets

Details The formation of terrestrial planets The formation of terrestrial planets

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.539..151w&link_type=abstract

In: Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets, 22-25 A

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Terrestrial Planets: Formation

Scientific paper

This paper is reviewing some aspects of our current understanding about the formation of terrestrial planets. There is not yet an unambiguous answer to the problem, how terrestrial planets form. However, there is but a limited number of principle mechanisms to work. Gravitational instabilities in a dense dust sublayer in protoplanetary disks to form km-sized planetesimals as precursors to planets are still debated. There are major problems though which shifted the view to the idea of growth of planets by mutual collisions of smaller bodies as current "standard model". Different problems arise from this approach. Variations and in a certain sense mixtures of these mechanisms might also be an alternative, e.g. growing 20cm bodies first which might then be accumulated in vortices directly into planets. While the alternatives are listed, this paper mostly gives an outline of the standard model of terrestrial planet formation, with a focus on planetesimal formation.

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