Particles and Fields Seminar
Probing the nature of the horizon with Gravitational-waves
Yotam Sherf
Ben-Gurion University
Abstract
One hundred years after the revolutionary discovery of Einstein's General Relativity (GR), we were first able to confirm Einstein's prediction and measure the Gravitational-wave emission from the coalescence of two Black-holes (BHs)s. This direct evidence of BHs made by the Laser interferometer GW observation (LIGO) launched the era of gravitational-waves astrophysics. It opened us to an unprecedented opportunity to probe the nature of BHs up to the horizon scale and use GWs as a microscope.
In this talk, I'll demonstrate how by performing long-duration observation in the post-merger data immediately following GW150914, we are able to impose significant constraints on the near-horizon region of the Kerr geometry. In the second part of the talk, I'll discuss the GR prediction, suggesting that BHs are empty. We address a simple question - are BHs empty or not? I'll show how a new type of universal model-independent hair can answer this question, thus confirming the validity of GR.
In this talk, I'll demonstrate how by performing long-duration observation in the post-merger data immediately following GW150914, we are able to impose significant constraints on the near-horizon region of the Kerr geometry. In the second part of the talk, I'll discuss the GR prediction, suggesting that BHs are empty. We address a simple question - are BHs empty or not? I'll show how a new type of universal model-independent hair can answer this question, thus confirming the validity of GR.