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AGN dusty tori as a clumpy two-phase medium: the 10 µm silicate feature

Marko Stalevski (UGent) , Jacopo Fritz (UGent) , Maarten Baes (UGent) , Theodoros Nakos (UGent) and Luka Č Popović
(2011) BALTIC ASTRONOMY. 20(3). p.490-494
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Abstract
We investigated the emission of active galactic nuclei dusty tori in the infrared domain, with a focus on the 10 mu m silicate feature. We modeled the dusty torus as a clumpy two-phase medium with high-density clumps and a low-density medium filling the space between the clumps. We used a three-dimensional radiative transfer code to obtain spectral energy distributions and images of tori at different wavelengths. We calculated a grid of models for different parameters and analyzed the influence of these parameters on the shape of the mid-infrared emission. A corresponding set of clumps-only models and models with a smooth dust distribution is calculated for comparison. We found that the dust distribution, the optical depth and a random arrangement of clumps in the innermost region, all have an impact on the shape and strength of the silicate feature. The 10 mu m silicate feature can be suppressed for some parameters, but models with smooth dust distribution are also able to produce a wide range of the silicate feature strength.
Keywords
RADIATIVE-TRANSFER, ACTIVE GALACTIC NUCLEI, radiative transfer, Seyfert, nuclei, galaxies: active, GALAXIES, EMISSION, QUASARS

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Citation

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MLA
Stalevski, Marko, Jacopo Fritz, Maarten Baes, et al. “AGN Dusty Tori as a Clumpy Two-phase Medium: The 10 Μm Silicate Feature.” BALTIC ASTRONOMY 20.3 (2011): 490–494. Print.
APA
Stalevski, M., Fritz, J., Baes, M., Nakos, T., & Popović, L. Č. (2011). AGN dusty tori as a clumpy two-phase medium: the 10 µm silicate feature. BALTIC ASTRONOMY, 20(3), 490–494. Presented at the 8th Serbian conference on Spectral Line Shapes in Astrophysics (SCSLSA).
Chicago author-date
Stalevski, Marko, Jacopo Fritz, Maarten Baes, Theodoros Nakos, and Luka Č Popović. 2011. “AGN Dusty Tori as a Clumpy Two-phase Medium: The 10 Μm Silicate Feature.” Baltic Astronomy 20 (3): 490–494.
Chicago author-date (all authors)
Stalevski, Marko, Jacopo Fritz, Maarten Baes, Theodoros Nakos, and Luka Č Popović. 2011. “AGN Dusty Tori as a Clumpy Two-phase Medium: The 10 Μm Silicate Feature.” Baltic Astronomy 20 (3): 490–494.
Vancouver
1.
Stalevski M, Fritz J, Baes M, Nakos T, Popović LČ. AGN dusty tori as a clumpy two-phase medium: the 10 µm silicate feature. BALTIC ASTRONOMY. 2011;20(3):490–4.
IEEE
[1]
M. Stalevski, J. Fritz, M. Baes, T. Nakos, and L. Č. Popović, “AGN dusty tori as a clumpy two-phase medium: the 10 µm silicate feature,” BALTIC ASTRONOMY, vol. 20, no. 3, pp. 490–494, 2011.
@article{2114219,
  abstract     = {We investigated the emission of active galactic nuclei dusty tori in the infrared domain, with a focus on the 10 mu m silicate feature. We modeled the dusty torus as a clumpy two-phase medium with high-density clumps and a low-density medium filling the space between the clumps. We used a three-dimensional radiative transfer code to obtain spectral energy distributions and images of tori at different wavelengths. We calculated a grid of models for different parameters and analyzed the influence of these parameters on the shape of the mid-infrared emission. A corresponding set of clumps-only models and models with a smooth dust distribution is calculated for comparison. We found that the dust distribution, the optical depth and a random arrangement of clumps in the innermost region, all have an impact on the shape and strength of the silicate feature. The 10 mu m silicate feature can be suppressed for some parameters, but models with smooth dust distribution are also able to produce a wide range of the silicate feature strength.},
  author       = {Stalevski, Marko and Fritz, Jacopo and Baes, Maarten and Nakos, Theodoros and Popović, Luka Č},
  issn         = {1392-0049},
  journal      = {BALTIC ASTRONOMY},
  keywords     = {RADIATIVE-TRANSFER,ACTIVE GALACTIC NUCLEI,radiative transfer,Seyfert,nuclei,galaxies: active,GALAXIES,EMISSION,QUASARS},
  language     = {eng},
  location     = {Divčibare, Serbia},
  number       = {3},
  pages        = {490--494},
  title        = {AGN dusty tori as a clumpy two-phase medium: the 10 µm silicate feature},
  volume       = {20},
  year         = {2011},
}

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