Over the past ten years astronomers have used type la supernovae to trace the expansion of the Universe to a look back time more than 70% of the age of the Universe. These observations show an accelerating Universe which is best explained by a cosmological constant, or other form of dark energy with an equation of state near w = p/p = -1. As future experiments attempt to better characterize the equation of state of the matter leading to the observed acceleration, systematic effects will ultimately limit progress.
机构:
Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Via Arnesano, I-73100 Lecce, Italy
INFN Lecce, Via Arnesano, I-73100 Lecce, ItalyUniv Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Via Arnesano, I-73100 Lecce, Italy
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Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan
Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA
Arizona State Univ, Beyond Ctr, Tempe, AZ 85287 USA
Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USAUniv Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan
Easson, Damien A.
Frampton, Paul H.
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Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan
Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USAUniv Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan
Frampton, Paul H.
Smoot, George F.
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Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
Ewha Womans Univ, Inst Early Universe, Seoul, South Korea
Adv Acad, Seoul, South Korea
Univ Paris Denis Diderot, Chaire Blaise Pascale, Paris, FranceUniv Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan