Detecting a gravitational-wave background with next-generation space interferometers

By H. Kudoh, A. Taruya, Takashi Hiramatsu, Y. Himemoto. 2005

236 citations recorded by the source corpus.

Future missions of gravitational-wave astronomy will be operated by space-based interferometers, covering very wide range of frequency. Search for stochastic gravitational-wave backgrounds (GWBs) is one of the main targets for such missions, and we here discuss the prospects for direct measurement of isotropic and anisotropic components of (primordial) GWBs around the frequency 0.1-10 Hz. After extending the theoretical basis for correlation analysis, we evaluate the sensitivity and the signal-to-noise ratio for the proposed future space interferometer missions, like Big-Bang Observer (BBO), Deci-Hertz Interferometer Gravitational-wave Observer (DECIGO) and recently proposed Fabry-Perot type DECIGO. The astrophysical foregrounds which are expected at low frequency may be a big obstacle and significantly reduce the signal-to-noise ratio of GWBs. As a result, minimum detectable amplitude may reach h^2 \ogw = 10^{-15} \sim 10^{-16}, as long as foreground point sources are properly subtracted. Based on correlation analysis, we also discuss measurement of anisotropies of GWBs. As an example, the sensitivity level required for detecting the dipole moment of GWB induced by the proper motion of our local system is closely examined.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/c49a39af5b1437f1d44a6fd4e59ed5eba3a012f6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

  1. K. Kohri
  2. Misao Sasaki
  3. Y. Sendouda
  4. Laila Alabidi
  5. B. Carr
  6. C. Byrnes
  7. Florian Kuhnel
  8. T. Terada

Citations in the corpus