PIRSA:22090090

Quasinormal-mode filters and their impacts on future black-hole spectroscopy

Ma, S. (2022). Quasinormal-mode filters and their impacts on future black-hole spectroscopy. Perimeter Institute. https://pirsa.org/22090090

Ma, Sizheng. Quasinormal-mode filters and their impacts on future black-hole spectroscopy. Perimeter Institute, Sep. 22, 2022, https://pirsa.org/22090090 

          @misc{ pirsa_PIRSA:22090090,
            doi = {10.48660/22090090},
            url = {https://pirsa.org/22090090},
            author = {Ma, Sizheng},
            keywords = {Strong Gravity},
            language = {en},
            title = {Quasinormal-mode filters and their impacts on future black-hole spectroscopy},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {sep},
            note = {PIRSA:22090090 see, \url{https://pirsa.org}}
          }

Sizheng Ma Perimeter Institute for Theoretical Physics

DOI 10.48660/22090090
Collection
Talk Type Scientific Series
Subject

Abstract

In this talk, I present a novel framework to do black-hole spectroscopy. This approach is based on a new technique so-called “quasinormal-mode filter”, which can be classified into two subsets: rational filter and full filter. On the theoretical level, I explain how to use the rational filter to understand the ringdown of numerical-relativity waveforms. On the observational level, I introduce a way to incorporate the filter into Bayesian analysis. The new Bayesian framework not only allows us to analyze the ringdown of a real gravitational-wave event without Markov chain Monte Carlo, but also yields a natural estimate of the ringdown start time. By applying our method to GW150914, we find strong and self-consistent evidence for the first overtone from multiple perspectives. On the other hand, the relationship between the full filter and the metric reconstruction is discussed. Its connection to a numerical-relativity technique “Cauchy-characteristic Matching” is provided. In the final part of the talk, I also briefly present our recent progress on fully relativistic 3D Cauchy-characteristic Matching.

Zoom link: https://pitp.zoom.us/j/95593408817?pwd=U2RXZDV2WUtwNDlaRDVBVTJjTEdBQT09