Wang Yu-Tong, Li Zhi-Peng, Zhang Jun, Zhou Shuang-Yong, Piao Yun-Song
1School of Physics, University of Chinese Academy of Sciences, Beijing, 100049 China.
2Department of Physics and Astronomy, York University, Toronto, ON M3J 1P3 Canada.
Eur Phys J C Part Fields. 2018;78(6):482. doi: 10.1140/epjc/s10052-018-5974-y. Epub 2018 Jun 11.
Gravitational wave (GW) ringdown waveforms may contain "echoes" that encode new physics in the strong gravity regime. It is commonly assumed that the new physics gives rise to the GW echoes whose intervals are constant. We point out that this assumption is not always applicable. In particular, if the post-merger object is initially a wormhole, which slowly pinches off and eventually collapses into a black hole, the late-time ringdown waveform exhibit a series of echoes whose intervals are increasing with time. We also assess how this affects the ability of Advanced LIGO/Virgo to detect these new signals.
引力波（GW）铃宕波形可能包含在强引力 regime 中编码新物理的“回声”。通常假设新物理会产生间隔恒定的引力波回声。我们指出这个假设并非总是适用。特别是，如果合并后物体最初是一个虫洞，它会慢慢收缩并最终坍缩成一个黑洞，那么晚期铃宕波形会呈现出一系列间隔随时间增加的回声。我们还评估了这对先进激光干涉引力波天文台（Advanced LIGO）/处女座（Virgo）探测这些新信号能力的影响。
