midinfrared interferometric observations of agns walter jaffe (leiden)
DESCRIPTION
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 Observatory Klaus Meisenheimer:MPIA Heidelberg - PowerPoint PPT PresentationTRANSCRIPT
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