I. Prandoni 1 , R. Morganti 2 , A. Mignano 1 1 INAF-IRA, Italy - 2 ASTRON, NL INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009 The AGN Component in Deep Radio Fields Current understanding & LOFAR perspectives
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I. Prandoni1, R. Morganti2, A. Mignano1
1 INAF-IRA, Italy - 2 ASTRON, NL
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
The AGN Component in Deep Radio Fields
Current understanding & LOFAR perspectives
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
RQ-AGN: (Jarvis & Rawlings 04)
LDDE [ largest comp. at z<1
RS compact & steep (<<10 kpc) 22< logP <24
host galaxy (em. line spectrum)
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
AGN feedback
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
64 %
14 %
19 %
(Mignano,IP+ 08)
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
In DEEP1abc: 24/39 ETS are flat/inverted: - P 5 GHz ~ 1022-24 W Hz-1 (+ ETS spectra) - Typically compact (<10-20 kpc) (+ flat) • Beamed component of FRI (BLLac) ?
• ADAF-ADAF+jet systems? (local LLAGNs) eg. Falcke & Biermann 99
• Obscured flat-spectrum RQ-AGNs ?
Upper limits
Double/Extended RS
(Mignano, IP+ 08)
flat
steep
flat
steep
II – AGN Component in FLS
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
steep
flat
S 1.4>0
.115
mJy
~1200 RS
[330 RS]
II – AGN Component in FLS
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
SFGs
RL AGNs RQ AGNs
flat
steep
SFGs
RL AGNs RQ AGNs
II – AGN Component in FLS
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
SFG
AGNs
Ellipticals
SFGs + RQ AGNs
Some have MIR colors typical of AGNs
Genuine RQ-AGN!
Sy2
II – AGN Component in FLS
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
SFG
AGNs
Ellipticals
RL AGNs + RQ AGNs
MIR properties of AGNs • RQ-AGNs: Mostly Sy2 • RL-AGNs: Sy2, Sy1, QSO + Ellipticals (FRI-like)
Sy2
Sy1/ QSO
II – AGN Component in FLS
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
IRAC Color-Color diagram:S8.0/S4.5 vs. S5.8/S3.6
SFG
AGNs
Ellipticals
• Flat-spectrum: Mostly Sy1, QSO plus Ell.
Steep-Spectrum Flat-Spectrum SFG
AGNs
Ellipticals
• Steep-spectrum: Mostly Sy2 plus Sy1, QSO
We find again a class of flat-spectrum AGNs associated to ellipticals!
Sy1/ QSO
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
S>10 microJy
0 1 2 3
NB:Not only steep LLAGNs
For flat AGNs LOFAR 240 MHz deep fields as faint as current VLA deep fields
INAF - ISTITUTO DI RADIOASTRONOMIA I. Prandoni – June 2009
• European bs increase resolution:
High spatial resolution important separate SB and AGN
Max Freq. Angular Confusion
Baseline resol. Limit (3σ) (km) (MHz) (“) (µJy) 150 240 2.4 13 500 240 0.6 5
1000 240 0.3 1
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