Abstract Details
| Name: Soham Bhattacharyya Affiliation: Indian Institute of Science Education and Research Thiruvananthapuram Conference ID: ASI2016_398 Title : Investigation of scalar hair in f(R) black holes using numerical techniques Authors and Co-Authors : Dr. S Shankaranarayanan HoD, SOP IISER TVM Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : The debate about the presence (or absence) of scalar hair has been going on for long. Uniqueness theorems, Birkhoff's theorem, Bekensteins' V theorem all showed that a static, asymptotically flat black hole solution in G.R. cannot have scalar hair. Hence f(R) theories have become a testing ground for the no scalar hair hypothesis. f(R) vacuum perturbations have two tensor and one scalar mode of freedom. Upon a suitable conformal transformation of the metric it is possible to decouple the scalar degree of freedom into a scalar field with a potential. Numerical simulations make it possible to solve the dynamical conformally transformed field equations. As a simple case we let a massless scalar field collapse in a spherically symmetric spacetime and observe the values of this scalar field at different time and distances. We also investigate the black hole horizon formation around the time and place it starts to form. This study provides us with clues as to whether we can detect scalar modes of gravitational waves in GW detectors. |