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- W2155268857 abstract "We simulate the evolution of the intergalactic medium (IGM) in a universe dominated by a cosmological constant. We find that within a few Hubble times from the present epoch, the baryons will have two primary phases: one phase composed of low-density, low-temperature, diffuse, ionized gas which cools rapidly with cosmic time due to adiabatic exponential expansion, and a second phase of high-density, high-temperature gas in virialized dark matter halos which cools much more slowly by atomic processes. The mass fraction of gas in halos converges to ∼40% at late times, about twice its calculated value at the present epoch. We find that in a few Hubble times, the large scale filaments in the present-day IGM will rarefy and fade away into the low-temperature IGM, and only islands of virialized gas will maintain their physical structure. We do not find evidence for fragmentation of the diffuse IGM at later times. More than 99% of the gas mass will maintain a steady ionization fraction above 80% within a few Hubble times. The diffuse IGM will get extremely cold and dilute but remain highly ionized, as its recombination time will dramatically exceed the age of the universe." @default.
- W2155268857 created "2016-06-24" @default.
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- W2155268857 date "2004-10-01" @default.
- W2155268857 modified "2023-10-14" @default.
- W2155268857 title "Future evolution of the intergalactic medium in a universe dominated by a cosmological constant" @default.
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- W2155268857 doi "https://doi.org/10.1016/j.newast.2004.03.003" @default.
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