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July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

The extreme environment in the center of Mrk 876 and the switch on of its AGN activity

Aug 1, 2015, 11:15 AM
Yangtze 1 (World Forum)

Yangtze 1

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-EX Parallel GA08 EGAL


Dr Eugenio Bottacini (Stanford University)


Results from surveys show that most galaxies underwent one or more eras of Active Galactic Nucleus (AGN) activity throughout their existence. During the AGN era the central region of the galaxy becomes very bright up to soft gamma-ray energies due to inverse-Comptonization by relativistic electrons. However, survey studies can not draw definite conclusions on what switches on the AGN activity in the first place. Instead case studies on single sources have the advantage of providing a complete picture of a source that allows for precise conclusions. In this talk we present the results of a case study on Mrk 876. The detection of a transient and extreme gravitationally redshifted Fe-line allows us to find its emission mechanism, thereby constraining the rotation of the super-massive black hole in the center of Mrk 876. This finding together with a morphological study of the source allow for conclusions on the mechanism that switched on the AGN activity in Mrk 876.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 751

Primary author

Dr Eugenio Bottacini (Stanford University)


Elena Orlando (Stanford University)

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