Gravitational waves and where to find them?

by Dr Kanthanakorn Noysena (NARIT)

Friday 25 Dec 2020, 14:00 → 15:00 Asia/Bangkok

Cassiopeia (AstroPark)

Abstract

The gravitational wave observatories made their first detection of gravitational waves (GWs) on 14 September 2015 and the origin of the GW signals was confirmed as a binary black hole (BBH) merger. After two years, the electromagnetic (EM) waves were detected after a merger of a binary neutron star (BNS) on 17 August 2017. Nowadays many GW candidate signals from BBHs were detected but none of them has reported the detection of an electromagnetic (EM) counterpart. Nevertheless, under certain conditions such a merger system could emit EM waves. If an optical counterpart were detected and identified, the understanding of BBH mergers could be refined and would provide us the new astrophysical implications. I will present the counterpart search of a GW source made by a very wide field of view telescopes and limits on the EM counterpart of BBH coalescence at visible wavelengths.