Benacquista Matthew J
Center for Gravitational Wave Astronomy, University of Texas at Brownsville, 80 Ft. Brown, Brownsville, Texas 78520 USA.
Living Rev Relativ. 2006;9(1):2. doi: 10.12942/lrr-2006-2. Epub 2006 Feb 7.
The galactic population of globular clusters are old, dense star systems, with a typical cluster containing 10-10 stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense population of stars, globular clusters are the scene of many interesting close dynamical interactions between stars. These dynamical interactions can alter the evolution of individual stars and can produce tight binary systems containing one or two compact objects. In this review, we discuss the theoretical models of globular cluster evolution and binary evolution, techniques for simulating this evolution which lead to relativistic binaries, and current and possible future observational evidence for this population. Globular cluster evolution will focus on the properties that boost the production of hard binary systems and on the tidal interactions of the galaxy with the cluster, which tend to alter the structure of the globular cluster with time. The interaction of the components of hard binary systems alters the evolution of both bodies and can lead to exotic objects. Direct -body integrations and Fokker-Planck simulations of the evolution of globular clusters that incorporate tidal interactions and lead to predictions of relativistic binary populations are also discussed. We discuss the current observational evidence for cataclysmic variables, millisecond pulsars, and low-mass X-ray binaries as well as possible future detection of relativistic binaries with gravitational radiation.
球状星团的星系成员是古老、致密的恒星系统，典型的星团包含10⁵ - 10⁶颗恒星。作为古老的恒星群体，球状星团包含许多坍缩和退化的天体。作为致密的恒星群体，球状星团是恒星之间许多有趣的近距离动力学相互作用发生的场所。这些动力学相互作用可以改变单颗恒星的演化，并能产生包含一个或两个致密天体的紧密双星系统。在这篇综述中，我们讨论球状星团演化和双星演化的理论模型、模拟这种演化从而产生相对论性双星的技术，以及关于这一群体的当前和可能的未来观测证据。球状星团演化将聚焦于促进硬双星系统形成的特性以及星系与星团的潮汐相互作用，这种相互作用往往会随着时间改变球状星团的结构。硬双星系统各组成部分之间的相互作用会改变两个天体的演化，并能导致奇特天体的形成。还将讨论球状星团演化的直接体积分和福克 - 普朗克模拟，这些模拟纳入了潮汐相互作用并能对相对论性双星群体进行预测。我们将讨论当前关于激变变星、毫秒脉冲星和低质量X射线双星的观测证据，以及未来利用引力波探测相对论性双星的可能性。
