Probing the Reheating Temperature of the Universe with a Gravitational Wave Background
The thermal history of the universe after big bang nucleosynthesis (BBN) is well understood both theoretically and observationally, and recent cosmological observations also begin to reveal the inflationary dynamics. However, the epoch between inflation and BBN is scarcely known. In this paper we show that the detection of the stochastic gravitational wave background around 1Hz provides useful information about thermal history well before BBN. In particular, the reheating temperature of the universe may be determined by future space-based laser interferometer experiments such as DECIGO and/or BBO if it is around 106-9 GeV, depending on the tensor-to-scalar ratio r and dilution factor F.
K. Nakayama et al., "Probing the Reheating Temperature of the Universe with a Gravitational Wave Background," Journal of Cosmology and Astroparticle Physics, vol. 2008, no. 6, Institute of Physics - IOP Publishing, Jun 2008.
The definitive version is available at https://doi.org/10.1088/1475-7516/2008/06/020
Keywords and Phrases
Gravity waves/theory; Inflation; Physics of the early universe
International Standard Serial Number (ISSN)
Article - Journal
© 2008 Institute of Physics - IOP Publishing, All rights reserved.
01 Jun 2008