Black holes and axions stars

  • Data: 12 aprile 2018 dalle 15:00 alle 16:00

  • Luogo: Aula Teorici, via Irnerio 46, Bologna

Partecipanti: Dr. Katy Clough: Goettingen University

Abstract: The relativistic dynamics of scalar fields which are subject to a non trivial self interaction potential are extremely rich and relevant to a number of theoretical problems. Using full 3+1 Numerical Relativity, many open problems which defy a perturbative approach can be solved, including the behaviour of the axion field in strong gravity. In we studied the stability and collapse of localised disturbances in the axion field and identified three regions of the parameter space: i) long-lived oscillating axion star solutions, with a base frequency modulated by self-interactions, ii) collapse to a BH and iii) complete dispersal due to gravitational cooling and interactions. I will discuss the results of our paper, the follow up work which others have done in interpreting and extending the result, and future directions of study.