| Name: Siddharth Dutta |
| Affiliation: Presidency University |
| Conference ID: ASI2026_352 |
| Title: Understanding Active Galactic Nuclei in Cosmological Simulations: A Mock Catalog Based Approach |
| Abstract Type: Poster |
| Abstract Category: Galaxies and Cosmology |
| Author(s) and Co-Author(s) with Affiliation: Siddharth Dutta(Presidency University, Kolkata - 700073, India), Anirban Chowdhary(Presidency University, Kolkata - 700073, India), Suchetana Chatterjee(Presidency University, Kolkata - 700073, India) |
| Abstract: We present a new framework for generating synthetic galaxies and, specifically, Active Galactic Nuclei (AGN) catalogs from the IllustrisTNG suite of simulations using the spectral energy distribution (SED) modelling code CIGALE (Code Investigating GALaxy Emission). When compared to the traditionally utilised Flexible Stellar Population Synthesis (FSPS) code, CIGALE offers a higher degree of modularity in the components of the synthetic galaxy and a much wider parameter set to explore the effects of astrophysical objects and their physical processes.
In this work, for the first time, we perform a cross-validation study between CIGALE and FSPS to demonstrate that CIGALE-generated SEDs and photometric data show broad agreement with FSPS-based results for the same TNG population. This establishes CIGALE as a robust and accurate alternative to model SEDs for simulation-based mock catalogs. The modularity of CIGALE can then be exploited to explore more nuanced physics like AGN-host galaxy relations. Our work lays the foundation to expand the predictive capabilities of mock catalogs for surveys like DESI while maintaining consistency with existing results. |
