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

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

2004-08-30

arxiv.org/abs/astro-ph/0408547v2

Prog.Theor.Phys. 113 (2005) 63-71

Astronomy and Astrophysics

Astrophysics

9 pages, 6 figures; accepted for publication in Prog. Theor. Phys

Scientific paper

10.1143/PTP.113.63

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 $\Omega_m$, $\Omega_w$ 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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