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

The Role of Fast Magnetic Reconnection on the Radio and Gamma-Ray Emission from the Nuclear Regions of Microquasars and Low Luminosity AGNs

Jul 31, 2015, 11:45 AM
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-TH Parallel GA06 TH

Speaker

Luís H. S. Kadowaki (University of Sao Paulo (IAG-USP))

Description

Fast magnetic reconnection events can be a very powerful mechanism operating in the core region of microquasars and active galactic nuclei (AGNs). In earlier work, it has been suggested that the power released by fast reconnection events between the magnetic field lines lifting from the inner accretion disk region and the lines anchored into the central black hole (BH) could accelerate relativistic particles and produce the observed radio emission from microquasars and low luminosity AGNs (LLAGNs). Moreover, it has been proposed that the observed correlation between the radio emission and the mass of these sources, spanning 10^10 orders of magnitude in mass, might be related to this process. In the present work, since gamma-ray emission is correlated with the accelerated relativistic particles that produce the radio emission, we have compared the magnetic power released by fast reconnection with the observed very high energy emission (from MeV/GeV to Tev bands) of microquasars, LLAGNs, blazars, and gamma-ray bursts (GRBs). Considering magnetic reconnection driven by turbulence, we found that in the case of LLAGNs and microquasars, not only their radio but also the gamma-ray emission can be due to magnetic power released by fast reconnection. We have found also that the gamma-ray emission has a correlation with mass analogous to the radio, indicating that both are conected with reconnection events in the core region. On the other hand, the emission from blazars and GRBs does not follow the same trend, suggesting that their emission is produced outside the core, as expected. Complementary to these studies, we will also present results of numerical MHD simulations of a shearing-box reproducing fast magnetic reconnection events in the turbulent corona above a BH accretion disk.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 683

Primary author

Luís H. S. Kadowaki (University of Sao Paulo (IAG-USP))

Co-authors

Dr Chandra B. Singh (University of Sao Paulo (IAG-USP)) Prof. Elisabete de Gouveia Dal Pino (University of Sao Paulo (IAG-USP))

Presentation materials

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