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Determination of the equation of the state of the Universe using ~ 0.1 Hz Gravitational Wave Detectors

Ryuichi Takahashi·Takashi Nakamura
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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 $Ω_m$, $Ω_w$ and $w$, respectively. In more realistic case of practical DECIGO or BBO (Big Bang Observer), $w$ will be determined within $\sim 10%$ 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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Ryuichi Takahashi, Takashi Nakamura. 2004-12-07. Determination of the equation of the state of the Universe using ~ 0.1 Hz Gravitational Wave Detectors. https://doi.org/10.1143/ptp.113.63

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