Constraints on a Vacuum Energy from Both SNIa and CMB Temperature Observations

Constraints on a Vacuum Energy from Both SNIa and CMB Temperature Observations

We investigate the cosmic thermal evolution with a vacuum energy which decays into photon at the low redshift. We assume that the vacuum energy is a function of the scale factor that increases toward the early universe. We put on the constraints using recent observations of both type Ia supernovae (...

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Veröffentlicht in:Advances in Astronomy 2012-01, Vol.2012 (2012), p.304-309
Hauptverfasser: Nakamura, Riou, Thushari, E. P. Berni Ann, Ikeda, Mikio, Hashimoto, Masa-aki
Format: Artikel
Sprache:eng
Schlagworte:
Cosmology
Studies
Temperature
Universe
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Zusammenfassung:We investigate the cosmic thermal evolution with a vacuum energy which decays into photon at the low redshift. We assume that the vacuum energy is a function of the scale factor that increases toward the early universe. We put on the constraints using recent observations of both type Ia supernovae (SNIa) by Union-2 compilation and the cosmic microwave background (CMB) temperature at the range of the redshift 0.01
ISSN:1687-7969
1687-7977
DOI:10.1155/2012/528243