13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

An eclipsing binary black hole in MRK 421

15 Dec 2015, 18:23
3m
Level -1, Room 17 (International Conference Centre Geneva)

Level -1, Room 17

International Conference Centre Geneva

Speakers

Dr Erika Benitez (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico (UNAM)) Dr Sergio Mendoza (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico)

Description

A model independent power spectrum light curve analysis in the optical, hard X-ray and gamma-rays of the blazar MRK 421 shows clear evidence for a periodicity of approximately 400 days. A subsequent full maximum likelihood analysis fitting an eclipse model confirms this periodicity with a consistent phase for the bands analysed. The most parsimonious physical mechanism to which this periodicity could be ascribed is a dynamical effect produced by an orbiting supermassive black hole companion of mass of about 10^7 solar masses eclipsing the central black hole, which has an approximate mass of 10^8 solar masses.

Primary authors

Dr Erika Benitez (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico (UNAM)) Dr Sergio Mendoza (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico)

Presentation Materials