Communication Dans Un Congrès Année : 2023

Radiative Tranfer modeling of NGC1068 using the Near and Mid IR VLTI data

Résumé

The Unification Scheme for Active Galactic Nuclei (AGN) was introduced by Miller & Antonucci (1985) to explain the various types of AGNs, which postulates that the observation of the types depend on the inclination angle of the observer. AGN of type 1 are seen face on, allowing to directly observe the super massive black hole (smbh) and the accretion disk, while AGN of type 2 are seen edge-on obscuring the center of the AGN by dust in the equatorial plane. Image reconstruction techniques and RT simulations based on ground based interferometric IR data of nearby AGNs suggest an extension, where IR polar emission has been detected, and proposed as dusty wind extending at scales much larger than the dust in the equatorial plane (H¨onig et al. 2012, 2013; Tristram et al. 2014; Lopez-Gonzaga et al. 2016; Asmus et al. 2016, Leftley et al. 2018). NGC1068 is a nearby AGN and has sparked big interest due to its entangled structure of its dusty medium, while being relatively easily spatially resolved from ground based interferometric IR observations in several wavebands. Analysis of the AGN in the K-band (GRAVITY collab. 2020), has suggested the existence of a hot ring along with a warm foreground, which challenges the Unification model for AGN. Analysis of the same target by MATISSE in the L, M and N band, points towards the confirmation of the Unification model for AGN including a polar emission (Gamez Rosas et al. 2022). Analyzed independently, these results seem to point to opposite interpretations, which furthermore has given NGC1068 support to carry out a multi-wavelength fit of both the GRAVITY and MATISSE data. I will primarily carry out 3D modelling with the RT tool SKIRT (Camps and Baes 2020, ascl:1109.003), aiming to disentangle the apparent contradiction.

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hal-05133633 , version 1 (27-06-2025)

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  • HAL Id : hal-05133633 , version 1

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Niklas Moszczynski, Yann Clénet, James Leftley, Romain Petrov, Pierre Vermot. Radiative Tranfer modeling of NGC1068 using the Near and Mid IR VLTI data. MASCA: Multi-wavelength AGN Structure and Cosmological Applications, James Leftley and Romain Petrov, Oct 2023, Nice, France. ⟨hal-05133633⟩
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