MidInfrared Interferometric Observations of AGNs

Walter Jaffe (Leiden)Klaus Meisenheimer(MPIA)Konrad Tristram (MPIA)David Raban (Leiden)Huub Rottgering (Leiden)

MIDI Observations of AGNs

Walter Jaffe: Leiden ObservatoryKlaus Meisenheimer:MPIA HeidelbergKonrad Tristram: MPIADavid Raban: Leiden

MIDI Observations of AGNs

Walter Jaffe: Leiden ObservatoryKlaus Meisenheimer:MPIA HeidelbergKonrad Tristram: MPIADavid Raban: Leiden

N1068 ions

NGC 1068

N1068 uv

N1068 dirty map

First data plots n1068

N1068 data_1

Pink ellipse

12micron circles 1 comp

Gallimore low res radio

Gallimore high res radio

Gallimore 3

Gall2003 masers

Pink ellipse

22.08.2006 Konrad R. Tristram Page 1

Circinus: the galaxy

• Spiral galaxy SA(s)b, i = ~65°

• RA = 14h 13m, DEC = - 65° 20’

• Seyfert type 2

• 4 × 106 M nucleus

• Distance ~4 Mpc ? 50 mas ~ 1 pc

• unresolved in MIR

2MASS J, H, Ks colour mosaic

Circinus: MIDI observations

• The Circinus UV coverage:21 fringe tracks,

16 photometries

Period 72, 04-02 (U3-U2)Period 73, 04-06 (U3-U2)Period 74, 05-02 (U3-U4)Period 75, 05-05 (U2-U3)Period 77, 06-05 (U2-U3)

-80-60-40-2020406080

u in m

-80

-60

-40

-20

20

40

60

80 v in mU2-U4

Circinus: total flux

8 9 10 11 12 13Wavelength in µm

0

5

10

15

20

Flu

x in

Jy

Circinus, total flux from all observations

Circinus: correlated flux

8 9 10 11 12 13Wavelength in µm

0.0

0.5

1.0

1.5

2.0

Flu

x in

Jy

PA= 44°, BL=49.4mPA= 54°, BL=51.1mPA= 57°, BL=51.7mPA= 88°, BL=58.2mPA=120°, BL=62.0mPA=131°, BL=62.4m

Circinus, observed: 2005-02-28

N

Circinus: modeling

Two blackbody Gaussians:

-200 0 200

-200

0

200

DE

C in

mas

RA in mas 11 µm

Log of model flux distribution at 11µm Position angle:

Silicate depth:

Filling factor:

Temperature:

Ellipticity:

Size:

Filling actor:

Temperature:

Ellipticity:

Size:

60°α =

1.3τSiO =

0.5f2 =

300 KT2 =

0.03ε2 =

42 masσ2 =

1.0f1 =

400 KT1 =

0.61ε1 =

9 masσ1 =

Greenhill 2003: Water Masers

Circinus: model result

RA in mas

DEC in mas

-75-50-25255075

-75

-50

-25

25

50

75

1.9 pc0.4 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 X No(?)• Cen A RG 4 0.3 X Yes(?)

Galaxy Type D R Detect? SiO

Mpc pc

Fainter AGNs:

Calibrated Correlated Flux

8 9 10 11 12 13

Wavelength λ in µm

0.0

0.2

0.4

0.6

0.8

1.0

Flu

x in

Jy

MCG-05-23 & Mrk 1239, observed: 2005-12-18

ozon

e

PA=23, PB=64.1m (MCG-05-23)PA=36, PB=41.2m (Mrk1239)PA=42, PB=44.9m (Mrk1239)

Calibrated Visibility

8 9 10 11 12 13

Wavelength λ in µm

0.0

0.5

1.0

1.5

2.0

Vis

ibili

ty

MCG-05-23 & Mrk 1239, observed: 2005-12-18

ozon

e

PA=23, PB=64.1m (MCG-05-23)PA=36, PB=41.2m (Mrk1239)PA=42, PB=44.9m (Mrk1239)

Granato plots

Cen A = NGC 5128

The core spectrum of Centaurus A

The core spectrum of Centaurus A Total flux

The core spectrum of Centaurus A

The core spectrum of Centaurus A Correlated flux of core

*V1(λ)

The core spectrum of Centaurus A

The core spectrum of Centaurus A

Synchrotron core:

n(E) ~ E-1.72

RC = 1.5 x 1014m = 1000 AUB = 0.3 GPsyn = 7 x 1034 Wacc = 2.4 days ~ τvar

MIDI - VLTI observations of Centaurus A

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 WPheat > 1035 W

but:PUV ~ 3x1034 W = 0.00004 PEdd

conclusionsPoints 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

conclusionsCritical Issues:

Warping/AsymmetriesOptical Thickness in different

sourcesHot dust