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The Dusty Torus of NGC1068

Bas Nefs Maarten Zwetsloot. The Dusty Torus of NGC1068. Overview. Review of our project Torus modeling Fitting to the measurements: Total flux Correlated flux Differential phase Preliminary results. Review. Modeling. [Picture model] Total flux : Insensitive to distribution of light.

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The Dusty Torus of NGC1068

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  1. Bas Nefs Maarten Zwetsloot The Dusty Torus of NGC1068

  2. Overview • Review of our project • Torus modeling • Fitting to the measurements: • Total flux • Correlated flux • Differential phase • Preliminary results

  3. Review

  4. Modeling [Picture model] • Total flux: Insensitive to distribution of light. • Correlated flux: Sensitive to orientation of light distribution, insensitive to translations of light distribution. • Differential phase: Sensitive to asymmetry of light distribution.

  5. Modeling Total flux • 3D model → 2D temperature image → 2D intensity image → total flux • 6 Parameters: Inclination, temperature, radius, falloff and absorption (Silicate and Calcium) Correlated flux • CF(u,v) = TF• |V(u,v)|, |V(u,v)| = |FT(I(x,y))| • 2 Parameters: Partice distribution scale and rotation of torus Differential phase • DP(u,v) = δ(u,v) - Linear Part of δ in λ, V(u,v) = |V(u,v)| exp(-ikδ) • 2 Parameters: Translation of torus in x and y direction

  6. Measurements Total Flux

  7. Measurements Correlated Flux

  8. Differential Phase

  9. To Do List

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