Renata Kallosh et al JCAP10(2003)015 doi:10.1088/1475-7516/2003/10/015
Observational bounds on cosmic doomsday
Renata Kallosh1, Jan Kratochvil1, Andrei Linde1, Eric V Linder2 and Marina Shmakova3
Show affiliations Recently it was found, in a broad class of models, that the dark energy density may change its sign during the evolution of the universe. This may lead to a global collapse of the universe within the time tc ~ 1010–1011 years. Our goal is to find what bounds on the future lifetime of the universe can be placed by the next generation of cosmological observations. As an example, we investigate the simplest model of dark energy with a linear potential V(
) = V0(1 + α). This model can describe the present stage of acceleration of the universe if α is small enough. However, eventually the field rolls down, V() becomes negative, and the universe collapses. The existing observational data indicate that the universe described by this model will collapse not earlier than tc 
10 billion years from the present moment. We show that the data from SNAP and Planck satellites may extend the bound on the `doomsday' time to tc 40 billion years at the 95% confidence level.
- Keywords
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E-print Number: astro-ph/0307185
Cited: by |
Refers: to
- PACS
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95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)
98.80.Bp Origin and formation of the Universe
98.70.Sa Cosmic rays (including sources, origin, acceleration, and interactions)
- Subjects
- Dates
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Issue 10 (October 2003)
Received 22 July 2003, accepted for publication 9 September 2003
Published 31 October 2003
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Observational bounds on cosmic doomsday
Renata Kallosh et al JCAP10(2003)015
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