PIRSA:21020019

Spontaneous black hole scalarization

Okada da Silva, H. (2021). Spontaneous black hole scalarization. Perimeter Institute. https://pirsa.org/21020019

Okada da Silva, Hector. Spontaneous black hole scalarization. Perimeter Institute, Feb. 11, 2021, https://pirsa.org/21020019 

          @misc{ pirsa_PIRSA:21020019,
            doi = {10.48660/21020019},
            url = {https://pirsa.org/21020019},
            author = {Okada da Silva, Hector},
            keywords = {Strong Gravity},
            language = {en},
            title = {Spontaneous black hole scalarization},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {feb},
            note = {PIRSA:21020019 see, \url{https://pirsa.org}}
          }

Hector Okada da Silva

Max Planck Institute for Gravitational Physics (Albert Einstein Institute)

Talk number
PIRSA:21020019
Collection
Talk Type
Subject
Abstract

General Relativity remains to this day our best description of gravitational phenomena. Nonetheless, issues such its quantization and cosmological constant problem suggest Einstein’s theory might not be final theory of the gravitational interaction. Motivated by these questions, theorists have proposed a myriad of extensions to General Relativity over the decades. In this seminar, I will focus on theories with extra scalar fields. In particular, I will describe how some of these theories can evade Solar System constraints and yet yield to new effects in the strong-gravity regime of compact objects, i.e. neutron stars and black holes. This is achieved through a process known as spontaneous scalarization, in which a compact object growths 'scalar hair' once certain conditions are met and remains 'bald' otherwise. I will review the basics of this effect and then focus on recent efforts in understanding it for black holes both in isolation and in binaries.