1 / 40

Mid-Infrared Interferometric Observations of AGNs: Insights from MIDI Data Analysis

Explore detailed MIDI observations of AGNs NGC 1068 and Circinus, revealing hot dust distribution, silicate absorption, and more. Discover significant findings on dust properties, emissions, and modeling within these active galactic nuclei.

neena
Download Presentation

Mid-Infrared Interferometric Observations of AGNs: Insights from MIDI Data Analysis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MidInfrared Interferometric Observations of AGNs Walter Jaffe (Leiden) Klaus Meisenheimer(MPIA) Konrad Tristram (MPIA) David Raban (Leiden) Huub Rottgering (Leiden)

  2. MIDI Observations of AGNs Walter Jaffe: Leiden Observatory Klaus Meisenheimer:MPIA Heidelberg Konrad Tristram: MPIA David Raban: Leiden

  3. MIDI Observations of AGNs Walter Jaffe: Leiden Observatory Klaus Meisenheimer:MPIA Heidelberg Konrad Tristram: MPIA David Raban: Leiden

  4. N1068 ions NGC 1068

  5. N1068 uv

  6. N1068 dirty map

  7. First data plots n1068

  8. N1068 data_1

  9. Pink ellipse

  10. 12micron circles 1 comp

  11. Gallimore low res radio

  12. Gallimore high res radio

  13. Gallimore 3

  14. Gall2003 masers

  15. Pink ellipse

  16. v in m 80 U2-U4 Period 72, 04-02 (U3-U2) Period 73, 04-06 (U3-U2) Period 74, 05-02 (U3-U4) 60 Period 75, 05-05 (U2-U3) Period 77, 06-05 (U2-U3) 40 20 u in m 80 60 40 20 -20 -40 -60 -80 -20 -40 -60 -80 Circinus: MIDI observations • The Circinus UV coverage: 21 fringe tracks, 16 photometries

  17. Circinus: total flux Circinus, total flux from all observations 20 15 Flux in Jy 10 5 0 8 9 10 11 12 13 Wavelength in µm

  18. Circinus: correlated flux Circinus, observed: 2005-02-28 2.0 N PA= 44°, BL=49.4m PA= 54°, BL=51.1m PA= 57°, BL=51.7m 1.5 PA= 88°, BL=58.2m PA=120°, BL=62.0m PA=131°, BL=62.4m Flux in Jy 1.0 0.5 0.0 8 9 10 11 12 13 Wavelength in µm

  19. Size: σ1 = 9 mas Ellipticity: ε1 = 0.61 Temperature: T1 = 400 K Filling actor: f1 = 1.0 Size: σ2 = 42 mas Ellipticity: ε2 = 0.03 Temperature: T2 = 300 K Filling factor: f2 = 0.5 Silicate depth: τSiO = 1.3 Position angle: α = 60° Circinus: modeling Two blackbody Gaussians: 200 0 DEC in mas -200 -200 0 200 11 µm RA in mas Log of model flux distribution at 11µm

  20. Greenhill 2003: Water Masers

  21. 75 50 25 75 50 25 -25 -50 -75 -25 -50 -75 Circinus: model result DEC in mas RA in mas 1.9 pc 0.4 pc

  22. Fainter AGNs: Galaxy Type D R Detect? SiO Mpc pc • MCG-05-23-16 S2 40 3 X Maybe • MK 1239 S1 80 5 X No • NGC 3783 S1 40 3 X No • NGC 1365 S2 24 2 X No(?) • NGC 7469 S1 70 5 XNo(?) • Cen A RG 4 0.3 X Yes(?)

  23. Calibrated Correlated Flux MCG-05-23 & Mrk 1239, observed: 2005-12-18 1.0 ozone PA=23, PB=64.1m (MCG-05-23) PA=36, PB=41.2m (Mrk1239) PA=42, PB=44.9m (Mrk1239) 0.8 0.6 Flux in Jy 0.4 0.2 0.0 8 9 10 11 12 13 Wavelength λ in µm

  24. Calibrated Visibility MCG-05-23 & Mrk 1239, observed: 2005-12-18 2.0 ozone 1.5 Visibility 1.0 0.5 PA=23, PB=64.1m (MCG-05-23) PA=36, PB=41.2m (Mrk1239) PA=42, PB=44.9m (Mrk1239) 0.0 8 9 10 11 12 13 Wavelength λ in µm

  25. Granato plots

  26. Cen A = NGC 5128

  27. The core spectrum of Centaurus A Total flux

  28. *V1(λ) The core spectrum of Centaurus A Correlated flux of core

  29. Synchrotron core: n(E) ~ E-1.72 RC = 1.5 x 1014m = 1000 AU B = 0.3 G Psyn = 7 x 1034 W acc = 2.4 days ~ τvar The core spectrum of Centaurus A

  30. MIDI - VLTI observations of Centaurus A Basic result: • Unresolved core: 80 ... 60% of 8 ... 13 µm flux • “Dust disk“: d ~ 0.6 pc, b:a = 1:3 (i = 66° ?), T = 240 K Pdust = 3x1034 W Pheat > 1035 W but: PUV ~ 3x1034 W = 0.00004 PEdd

  31. conclusions Points of Interest: NGC1068: hot dust coincides with H20 masers+free-free emission Warped disk; silicate absorption Circinus: less hot dust; (less) warped disk; SiO4 abs Others: little hot dust; optically thin(?); no SiO4 abs

  32. conclusions Critical Issues: Warping/Asymmetries Optical Thickness in different sources Hot dust

More Related