Seminar:- Have LIGO and Virgo Observed Dark Matter?

The LIGO and Virgo collaborations recently reported the short gravitational-wave signal GW190521, interpreted as a the merger of black holes, one populating the pair-instability supernova gap, to form a remnant black hole of Mf~142M☉ at a luminosity distance of dL~5.3Gpc. With barely visible pre-merger emission, however, GW190521 merits further investigation of the pre-merger dynamics and even of the very nature of the colliding objects. In this talk the speaker will discuss alternative scenarios that have been proposed for the source of this very special gravitational-wave signal. In particular, he will show that the signal is consistent with the merger of two boson stars, estimating a constituent boson mass of 8.72^{+0.73}_{-0.82}×10^{-13} eV. If confirmed by future observations, GW190521 would provide the first evidence for a long sought dark matter particle.

時間:2021.04.21(三) 15:30~16:30
頻道:Zoom ID:968-0290-5013
講者:Dr. Juan CALDERÓN BUSTILLO(Galician Institute of High Energy Physics (IGFAE) University of Santiago de Compostela, Spain)