Anantua Richard, Easther Richard, Giblin John T
Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
Phys Rev Lett. 2009 Sep 11;103(11):111303. doi: 10.1103/PhysRevLett.103.111303. Epub 2009 Sep 10.
A population of very light primordial black holes which evaporate before nucleosynthesis begins is unconstrained unless the decaying black holes leave stable relics. We show that gravitons Hawking radiated from these black holes would source a substantial stochastic background of high frequency gravititational waves (10(12) Hz or more) in the present Universe. These black holes may lead to a transient period of matter-dominated expansion. In this case the primordial Universe could be temporarily dominated by large clusters of "Hawking stars" and the resulting gravitational wave spectrum is independent of the initial number density of primordial black holes.
除非衰变的黑洞留下稳定遗迹，否则在核合成开始之前蒸发的极轻原初黑洞群体不受限制。我们表明，从这些黑洞霍金辐射出的引力子会在当前宇宙中产生大量高频引力波（10¹²赫兹或更高）的随机背景。这些黑洞可能会导致物质主导膨胀的一个瞬态阶段。在这种情况下，原初宇宙可能会暂时由大量“霍金星”团主导，并且由此产生的引力波谱与原初黑洞的初始数密度无关。
