Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-05-13
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
final revised version, to appear in the "Astrophysics Update" ed J.W.Mason (Springer-Praxis, 2004), 18 pages including 8 figur
Scientific paper
The recently assembled laser-beam detectors of gravitational waves are approaching the planned level of sensitivity. In the coming 1 - 2 years, we may be observing the rare but powerful events of inspiral and merger of binary stellar-mass black holes. More likely, we will have to wait for a few years longer, until the advanced detectors become operational. Their sensitivity will be sufficient to meet the most cautious evaluations of the strength and event rates of astrophysical sources of gravitational waves. The experimental and theoretical work related to the space-based laser-beam detectors is also actively pursued. The current gravitational wave research is broad and interesting. Experimental innovations, source modelling, methods of data analysis, theoretical issues of principle are being studied and developed at the same time. The race for direct detection of relatively high-frequency waves is accompanied by vigorous efforts to discover the very low-frequency relic gravitational waves through the measurements of the cosmic microwave background radiation. In this update, we will touch upon each of these directions of research, including the recent data from the Wilkinson Microwave Anisotropy Probe (WMAP).
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