WD 1953−011: a magnetic white dwarf with peculiar field structure |
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| Authors: | P F L Maxted L Ferrario T R Marsh D T Wickramasinghe |
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| Institution: | DAMTP, Centre for Mathematical Sciences, Cambridge University, Wilberforce Road, Cambridge CB3 0WA;Theoretical Physics, The Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ |
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| Abstract: | We present a new interpretation of recent observations suggesting that the expansion of the Universe has recently started to accelerate. A cosmological model with a quintessence field driven by a potential motivated by M-theory is used to study the energy density and equation of state for the Universe. We find that late-time acceleration does not have to lead to the usual predictions of perpetual acceleration. The model allows another broad class of scenarios in which today's acceleration is a transient phenomenon, which is succeeded by a return to matter domination and decelerating expansion. |
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| Keywords: | cosmology: theory |
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