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