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Scalar-field cosmological and collapse models with general self-interaction potentials

Roberto Giambò1, Fabio Giannoni1 and Giulio Magli2

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We present the results of the investigation of a wide class of self-interacting, self-gravitating homogeneous scalar fields models, characterized by quite general conditions on the scalar field potential, and including both asymptotically polynomial and exponential behaviors. We show that the generic evolution is always divergent in a finite time, and this result is used to construct cosmological models as well as radiating collapsing star models of the Vaidya type – for the latter it turns out that black holes are generically formed.


PACS

98.80.Es Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)

95.30.Sf Relativity and gravitation

04.40.-b Self-gravitating systems; continuous media and classical fields in curved spacetime

97.60.Lf Black holes

04.70.-s Physics of black holes

Subjects

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 1 (2009)



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