Black hole scalarization
Abstract
General Relativity remains our best description of gravitational phenomena. Nonetheless, issues such as its quantization and the cosmological constant problem suggest that Einstein's theory might not be the final theory of gravitational interaction. Motivated by these questions, theorists have proposed many extensions to General Relativity over the decades. In this presentation, 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 yield 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 the compact object grows "scalar hair" once certain conditions are met and remains "bald" otherwise. I will review the basics of this effect and then give a short bird's-eye view of our understanding of scalarization for black holes both in isolation and binaries.
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Issue
Physics: Connecting islands of knowledge
19-21 July 2023, Del Carmen, Siargao Island
Please visit the SPP2023 activity webpage for more information on this year's Physics Congress.