Measurement of the cosmological constant

Authors :: P Antilogus
Institut de Physique Nucléaire de Lyon (IPNL)
Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)
Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Flores, Sylvie
Source :: LEP Legacy, LEP Legacy, Oct 2001, Sienne, Italy
Publication Year :: 2002
Publisher :: Elsevier BV, 2002.
Abstract: The type Ia Supernovae (SN Ia) provided the first direct indication of a non zero cosmological constant (Λ). After an introduction of the scientific context, the status of the cosmological constant measurement will be reviewed. The usage of SN Ia to probe the vacuum energy and more generally to study the dark energy seems quite promising. In a close future SN Ia should provide precise and well controlled measurements. The program “nearby SuperNova Factory” (SNFactory), centered on detailed studies of ~400 nearby SN Ia, and the proposal “SuperNova Accelerating Probe satellite” (SNAP), which should be a break through in the study of the acceleration of the Universe expension, will be introduced.