2021/03/19(Fri) 11:00 -12:00 一樓演講廳 1F, Auditorium
Title
Gravitational Waves and their Tidal Forces in Cosmological Spacetimes
Speaker
劉彥緯博士 (國立清華大學物理學系) Dr. Yen-Wei Liu (Department of Physics, National Tsing Hua University)Abstract
The propagation of gravitational waves (GWs), despite being well-studied in the asymptotically-flat spacetimes, has not been much addressed in a cosmological background until very recently. As most of the LIGO/Virgo's confirmed events have seen such non-trivial redshifts from their progenitors, it becomes more desirable to investigate these GW signatures from first principles. Among other things, the scalar acoustic waves associated with the scalar portion of the metric have been uncovered to potentially coexist with their usual spin-2 counterparts in a relativistic fluid-driven cosmology. I will discuss these new features in some physical scenarios of cosmological interest.
Language
演講語言 (Language): in English
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