Accelerating Universe: Observational Status and Theoretical Implications

Details Accelerating Universe: Observational Status and Theoretical Implications Accelerating Universe: Observational Status and Theoretical Implications

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..848..698p&link_type=abstract

RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS: 7th International Conference of the Hellenic Astronomical Society. AIP Conferenc

Astronomy and Astrophysics

Astrophysics

34

Observational Cosmology, Supernovae, Dark Energy

Scientific paper

This is a pedagogical review of the recent observational data obtained from type Ia supernova (SnIa) surveys that support the accelerating expansion of the universe. The methods for the analysis of the data are reviewed and some of the theoretical implications obtained from their analysis are discussed. In particular, the existence of dark energy with negative pressure required by the data is demonstrated and the simplest type of dark energy (the cosmological constant) is shown to fit well the SnIa data. Dynamical forms of evolving dark energy are also shown at their best fit form to the data and their common features are discussed.

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