Gravitational Physics Exploring the Structure of Space and Time (1999) / Chapter Skim
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Executive Summary
Executive Summary
Pages 1-6
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Gravitational physics is thus a two-frontier science. On the large scales of astrophysics and cosmology it is central to the understanding of some of the most exotic phenomena in the universe black holes, pulsars, quasars, the final destiny of stars, and the propagating ripples in the geometry of spacetime called gravitational waves.
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Black holes, gravitational waves, closed universes, and the big bang are some examples. Further, when the principles of classical general relativity are united with quantum theory, quantum uncertainties can be expected in the geometry of spacetime itself.
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· The use of gravitational waves to probe the universe of complex astronomical phenomena by the decoding of the details of the gravitational wave signals from particular sources. · The continuing transformation of cosmology into a data-driven science by the wealth of measurements expected from new cosmic background radiation satellites, new telescopes in space and on the ground, and new systematic surveys of the large-scale arrangements of the galaxies.
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In light of such opportunities, the CGP identified the following unordered list of highest-priority goals for gravitational physics: · Receive gravitational waves and use them to study regions of strong gravity. Explore the extreme conditions near the surface of black holes.
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· Support technology development that will provide the foundation for future improvements in LIGO's sensitivity. The Low-Frequency Gravitational Wave Window · Develop a space-based laser interferometer facility able to detect the gravitational waves produced by merging supermassive black holes.
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. Use astronomical observations of supernovae and gravitational lenses to infer the distribution of dark matter and to measure the cosmological constant.
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