Determination of the equation of the state of the Universe using ~ 0.1 Hz Gravitational Wave Detectors
Ryuichi Takahashi, Takashi Nakamura
Abstract
We show that ten(one) years operation of the ultimate DECIGO (DECihertz Interferometer Gravitational wave Observatory) can determine the cosmic equation of the state with such accuracy that 0.06%(3%), 0.08%(4%) and 0.06%(3%) for Ωm, Ωw and w, respectively. In more realistic case of practical DECIGO or BBO (Big Bang Observer), w will be determined within 10% by ten years observation assuming the flat universe model. Hence, the DECIGO or BBO will give an independent determination of the cosmic equation of the state.
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