EDP Sciences
Free access
Volume 372, Number 2, June III 2001
Page(s) 377 - 380
Section Cosmology
DOI http://dx.doi.org/10.1051/0004-6361:20010458

A&A 372, 377-380 (2001)
DOI: 10.1051/0004-6361:20010458

Determining the cosmic equation of state using future gravitational wave detectors

Z.-H. Zhu1, 2, M.-K. Fujimoto1 and D. Tatsumi1

1  National Astronomical Observatory, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan
2  National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, PR China

(Received 13 June 2000 / Accepted 22 March 2001 )

The expected chirp mass distribution of observed events for future gravitational wave detectors is extensively investigated in the presence of an exotic fluid component with an arbitrary equation of state, $-1 \leq \omega_x \equiv p_x/\rho_x < 0$, i.e., the so-called dark energy component. The results for a flat model dominated by dark energy are compared to those for the standard flat model dominated by cold dark matter. It is found that for a flat universe the chirp mass distribution shows a sensitive dependence on $\omega_x$, which may provide an independent and robust constraint on the cosmic equation of state.

Key words: cosmology: theory -- gravitational waves

Offprint request: Z.-H. Zhu, zong-hong.zhu@nao.ac.jp

© ESO 2001