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Are gravitational wave ringdown echoes always equal-interval?

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 th...

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Detalles Bibliográficos
Autores principales: Wang, Yu-Tong, Li, Zhi-Peng, Zhang, Jun, Zhou, Shuang-Yong, Piao, Yun-Song
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6424174/
https://www.ncbi.nlm.nih.gov/pubmed/30956552
http://dx.doi.org/10.1140/epjc/s10052-018-5974-y
Descripción
Sumario: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.