[astroseminar at Sapienza] 15/10/2019 at 14:00: Purnendu Karmakar

[Marco De Petris]

Title: Observational predictions of the viable generalized 
scalar-tensor theory
Speaker: Purnendu Karmakar
Institution: Sapienza Università di Roma - Dept. of Physics
Date: Tuesday, 15 Oct 2019
Time: 2:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
In the past few decades, several extensions of the general relativity 
(GR) were proposed for explaining the present cosmic acceleration at the 
cosmological distance scale. Modifications of gravity often either 
change the speed or amplitude damping of gravitational waves (GW) 
propagation or both. Therefore a GW is a new powerful tool probing the 
modified gravity models. The multi-messenger gravitational wave (GW) 
event, GW170817 (binary neutron star merging event) by the LIGO/VIRGO 
collaboration and the associated gamma-ray burst (GRB) event, GRB170817A 
put a very tight constraint on the speed of gravitational wave 
propagation with respect to the speed of light. Large classes of models 
are still viable which changes the amplitude damping of gravitational 
waves (GW) propagation.

web: https://agenda.infn.it/event/20288/