Directional Limits on Persistent Gravitational Waves Using LIGO S5 Science Data

DOI DOI HANDLE HANDLE HANDLE ほか19件をすべて表示 一部だけ表示 被引用文献9件 参考文献24件 オープンアクセス

書誌事項

公開日
2011-12-29
資源種別
journal article
権利情報
  • http://link.aps.org/licenses/aps-default-license
DOI
  • 10.1103/physrevlett.107.271102
  • 10.48550/arxiv.1109.1809
公開者
American Physical Society (APS)

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説明

The gravitational-wave (GW) sky may include nearby pointlike sources as well as astrophysical and cosmological stochastic backgrounds. Since the relative strength and angular distribution of the many possible sources of GWs are not well constrained, searches for GW signals must be performed in a model-independent way. To that end 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. The latter result is the first of its kind. Finding no evidence to support the detection of GWs, we present 90% confidence level (CL) upper-limit maps of GW strain power with typical values between 2-20x10^-50 strain^2 Hz^-1 and 5-35x10^-49 strain^2 Hz^-1 sr^-1 for pointlike and extended sources respectively. The limits on pointlike sources constitute a factor of 30 improvement over the previous best limits. We also set 90% CL limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN1987A and the Galactic Center as low as ~7x10^-25 in the most sensitive frequency range near 160 Hz. These limits are the most constraining to date and constitute a factor of 5 improvement over the previous best limits.

10 pages, 4 figures

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