Browsing by Author "Mahnashi, Laila"

Now showing 1 - 1 of 1

Restricted
Exploring the High Energy Emission and Luminosity Mechanisms in Binary Black hole Systems Embedded in Active Galactic Nuclie
(Saudi Digital Library, 2025) Mahnashi, Laila; Gendre, Bruce
In this project, I implement a theoretical astrophysics study to investigate the potential electromagnetic (EM) signatures of binary black hole (BBH) systems embedded within the accretion discs of active galactic nuclei (AGNs). The primary objective is to model the spectral energy distribution (SED) of both the AGN and the BBH system, with the aim of identifying physical conditions under which the BBH-induced emission may become observationally distinguishable from the dominant disc background. To construct realistic SEDs, the model incorporates key radiative processes, including thermal blackbody emission from the AGN disc, synchrotron radiation from relativistic electrons, and inverse Compton scattering of seed photons. Systematic variations in viscosity, accretion rate, density, and optical depth are explored to assess their influence on the spectral properties. Special emphasis is also placed on transient flare events associated with BBH activity and on scenarios where the AGN disc is intrinsically dimmed. These conditions may enhance the visibility of BBH-driven high-energy emission, partic ularly in the hard X-ray and gamma-ray regimes. The results suggest that during low-luminosity phases of AGNs and BBH flaring episodes, the BBH emission can dominate at high photon energies, providing a promising opportunity for detection. This approach offers a complementary perspective to conventional methods, align ing with emerging observational efforts to connect gravitational-wave detections with electromagnetic counterparts. Although the model adopts several simplifying assumptions, it provides valuable theoretical insights into the EM observability of BBHsystems in AGN environments and contributes to the broader understanding of multimessenger astrophysics.
6 0