Dark Energy and Termonuclear Supernovae

Details Dark Energy and Termonuclear Supernovae Dark Energy and Termonuclear Supernovae

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008lnea....3...45d&link_type=abstract

Lecture Notes and Essays in Astrophysics, vol. 3. Proceedings of the 3rd Symposium of the Astrophysics Group of the Spanish Roya

Astronomy and Astrophysics

Astrophysics

Stellar Evolution Models, White Dwarfs, Supernovae, Cosmology

Scientific paper

Nowadays it is widely accepted that the current Universe is dominated by dark energy and exotic matter, the so called StandardModel of Cosmoloy or CDM model. All the available data (Thermonuclear Supernovae, Cosmic Microwave Background, Baryon Acoustic Oscillations, Large Scale Structure, etc.) are compatible with a flat Universe made by ~70% of dark energy. Up to now observations agree that dark energy may be the vacuum energy (or cosmological constant) although improvements are needed to constrain further its equation of state. In this context, the cosmic destiny of the Universe is no longer linked to its geometry but to the nature of dark energy; it may be flat and expand forever or collapse. To understand the nature of dark energy is probably the most fundamental problem in physics today; it may open new roads of knowledge and led to unify gravity with the other fundamental interactions in nature. It is expected that astronomical data will continue to provide directions to theorists and experimental physicists. Type Ia supernovae (SNe Ia) have played a fundamental role, showing the acceleration of the expansion rate of the Universe a decade ago, and up to now they are the only astronomical observations that provide a direct evidence of the acceleration. However, in order to determine the source of the dark energy term it is mandatory to improve the precision of supernovae as distance indicators on cosmological scale.

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