Search for a stochastic gravitational-wave background using a pair of torsion-bar antennas

Ayaka Shoda, Masaki Ando, Koji Ishidoshiro, Kenshi Okada, Wataru Kokuyama, Yoichi Aso, Kimio Tsubono

研究成果: Article査読

22 被引用数 (Scopus)

抄録

We have set a new upper limit on the stochastic gravitational-wave background using two prototype torsion-bar antennas (TOBAs). A TOBA is a low-frequency gravitational-wave detector with bar-shaped test masses rotated by the tidal force of gravitational waves. As a result of simultaneous 7-hour observations with TOBAs in Tokyo and Kyoto in Japan, our upper limit with a confidence level of 95% is Ωgwh02<1.9×1017 at 0.035-0.830 Hz, where h0 is the Hubble constant in units of 100 km/s/Mpc and Ωgw is the gravitational-wave energy density per logarithmic frequency interval in units of the closure density. We successfully updated the upper limit and extended the explored frequency band.

本文言語English
論文番号027101
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
89
2
DOI
出版ステータスPublished - 2014 1 22

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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