Problems in Gravitation

该提案旨在支持PI教授Richard Matzner在经典引力领域的一系列问题，包括宇宙学、黑洞物理和引力波物理。这项工作将利用各种分析、近似和计算方法来完成。他们将继续研究黑洞相互作用和在这些相互作用中产生的引力辐射。这些相互作用将使用现有的计算机代码进行建模，这些代码也将扩展到描述宇宙学背景下黑洞的形成。这些黑洞研究在宇宙学上是重要的，因为从天文观测来看，大多数或所有星系内部似乎都包含一个黑洞。此外，宇宙学证据表明，许多或大多数星系都经历了合并，这表明它们的黑洞可能已经合并。计划中的实验将探测来自太空探测器的引力辐射，这些探测器对这种合并很敏感。同样的计算描述也将适用于恒星质量黑洞系统，这可能是（地面）LIGO探测器首次探测到的最强信号，该探测器目前正在建设中。对预期引力波的准确预测可以使搜索更加精确，从而提高观测信号的灵敏度。此外，对这些信号的理解将与理解引起这些信号的现象有直接的联系，并将为强磁场引力的行为提供新的线索

***9800725MatznerThis proposal is to support the work of PI Prof. Richard Matzner, for a range of problems in classical gravity, including cosmology, black hole physics, and gravitational wave physics. The work will be done utilizing a variety of analytical, approximate, and computational methods. They will continue investigation of black hole interactions and the gravitational radiation produced in these interactions. These interactions will be modeled using existing computer codes, and these codes will also be extended to describe the formation of black holes in cosmological settings. These black hole investigations are important cosmologically because it seems from astronomical observations that most or all galaxies contain a black hole within them. Further, cosmological evidence shows that many or most galaxies have undergone merger, suggesting that their black holes may have merged. There are planned experiments to detect gravitational radiation from spaceborne detectors, which would be sensitive to such mergers. The same computational description will also apply to stellar-mass black hole systems, which may be the strongest signals first detected in the (ground based) LIGO detector, which is currently under construction. Accurate prediction of expected gravitational waves allows a more precise search and, therefore, greater sensitivity in the observation of such signals. Further, the understanding of these signals will have a direct connection to understanding the phenomena that caused them and will shed new light on the behavior of strong field gravity.***