Accelerated Expansion: Theory and Observations

Details Accelerated Expansion: Theory and Observations Accelerated Expansion: Theory and Observations

2001-09-20

arxiv.org/abs/astro-ph/0109349v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the Helsinki Conference: Symposium on Ultra Low Energy Physics; 9 pages, uses jltp.cls. Published in Journal of

Scientific paper

The present paradigm in cosmology is the usual Big-Bang Cosmology in which two stages of accelerated expansion are incorporated: the inflationary phase in the very early universe which produces the classical inhomogeneities observed in the universe, and a second stage of acceleration at the present time as the latest Supernovae observations seem to imply. Both stages could be produced by a scalar field and observations will strongly constrain the microscopic lagrangian of any proposed model.

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