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- Seiji Kawamura, Masaki Ando, +132 authors Taizoh Yoshino
- 2008

- B P Abbott, R Abbott, +497 authors J Rollins
- Nature
- 2009

A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources of astrophysical and cosmological origin. It should carry unique signatures from the earliest epochs in the evolution of the Universe, inaccessible to standard astrophysical observations. Direct measurements of… (More)

- J Abadie, B P Abbott, +497 authors L Pinard
- Physical review letters
- 2011

The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence… (More)

- Yasushi Mino
- 2005

(Received) We investigate a calculation method for the gravitational evolution of an extreme mass ratio binary, i.e. a binary constituting of a galactic black hole and a stellar mass compact object. The inspiralling stage of this system is considered to be a possible source of detectable gravitational waves. Because of the extreme mass ratio, one may… (More)

- Yasushi Mino, Misao Sasaki, Masaru Shibata, Hideyuki Tagoshi, Takahiro Tanaka
- 2008

In this chapter, we present analytic calculations of gravitational waves from a particle orbiting a black hole. We first review the Teukolsky formalism for dealing with the gravitational perturbation of a black hole. Then we develop a systematic method to calculate higher order post-Newtonian corrections to the gravitational waves emitted by an orbiting… (More)

- Masaki Ando, Seiji Kawamura, +132 authors Taizoh Yoshino
- 2008

DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected to provide us fruitful insights into the universe, in particular about dark energy, a formation mechanism of supermassive black holes, and the inflation of the… (More)

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