1. T-RECS the Tiered Radio Extragalactic Continuum Simulation
Dr Anna Bonaldi
SKA project scientist

2. Motivation
SKA designed to improve dramatically wrt current state-of-art radio facilities
Currently available data are no match for those SKA will collect
Need sky simulations to optimise surveys/ test pipelines/ forecast results, etc.
21 September 2016

3. (2008) Suite of simulations of the SKA accessible sky
Publicly available, through web interface
An invaluable tool (e.g. S3-SEX cited in 15 SKA science chapters!!)
21 September 2016

4. Scubed-SEX (Wilman et al. 2008)
Extragalactic continuum
1.4 GHz counts
Bonaldi et al. (2016)

5. Scubed-SEX (Wilman et al. 2008)
Extragalactic continuum
Bonaldi et al. (2016)

6. New simulation: T-RECS!
Bonaldi et al. (in prep)
New extragalactic simulation updated to match the most recent results
Semi-empirical -> physical description
Polarization information
Development in progress
To be fully released publicly
“Beta” version available on request
Collaborators: G. de Zotti, M. Bonato, C. Mancuso, M. Massardi, V. Galluzzi, M. L. Brown, S. Kay, S. Camera, I. Harrison

7. Luminosity function AGNs Massardi et al. (2010) Up to 5 GHz
need to update De Zotti model for v>5 GHz
Massardi et al. (2010)

8. Luminosity function SFGs Mancuso et al. (2015)
Star-formation rate functions combined with
SFR -> synch
SFR -> free-free
Accurately reproduces FIR, radio, UV

9. 1.4 GHz counts Source sounts Vernstrom et al. P(D)
Massardi and Mancuso models
T-RECS sample

10. Clustering “Deep” Tier (25 sqdeg)
Matching galaxies to dark haloes of a high-resolution DM cosmological simulation
Planck Millennium simulation run by the Virgo consortium
800 Mpc box , down to Msun mass resolution
SFGs: MH->Lradio parametric relation by Aversa et al. (2015) + abundance matching
AGNs: P(MH|HERG/LERG) from Janssen et al P(HERG/LERG|M*) and Aversa et al MH->M*

11. Clustering

12. Clustering “Wide” Tier (over 25 sqdeg)
No cosmo simulation available with larger area and high enough mass resolution
Use density field + bias prescriptions
Informed by deep tier abundance matching results

13. Size and Shape SFGs Shape: exponential Sersic profile
Re ->M* with parametric relation of Shen et al. (2003)
New fit for radio:

14. Size and Shape AGNs
BLLac
FSRQ
Main axis intrinsic size: PDF Di Pompeo et al. 2013
Coupled with view angle to give proj size
Small angles: BLLac, FSRQ
Large angles: steep spectrum FRI/FRII sources
FRI/FRII

15. Size and Shape AGNs FRI/FRII classification
Rs=b/T<0.5 ->FRI
FRI/FRII classification
Rs distributions from Lin et al. 2010
Mapping mostly HERG to FRII and LERG to FRI
Next step:
3D parametric description of AGN morphology
Parameter distribution linked to AGN type b T b T
Rs=b/T>0.5 ->FRII

16. Polarization AGNs 1.4 GHz: Hales et al. (2014) Stil et al. (2014)
Rudnick & Owen (2014)
Bankfield et al. (2014) ….
20 GHz:
Galluzzi, Massardi, AB et al. (2014)
Good characterization of Pol fraction and Pol counts
Pol fraction Pol counts
FSRQ
Characterize spectra statistically (spectral indices etc.)
to create a multi-frequency model

17. Polarization SFGs Few info on polarization properties of SFGs
3D model of Milky way (Sun & Reich 2012)
Stil et. al. (2009)
GOODS-N Rudnick & Owen (2014)
Taylor et al. (2014)
New data??
Pol fraction of 4.8 GHz and 1% at 1.4 GHz
Total intensity-Pol fraction anticorrelation?
possibly a selection bias
Magnetic field model (e.g. Braun et al. 2010)

18. Current catalogue: AGNs
More frequencies
L 1.4
Log
erg/s/Hz I1
mJy … IN MH
logMsun
Lat offset
degs
Lon offset z
Size
[Kpc]
View angle
arcsec Rs
Pop
31.273
2.4726
9.21e-5 5
30.457
0.2967
2.4705
30.425
30.031
0.1266
2.4699
Fits binary table. Python script to convert to ASCII
BLLac

19. Current Catalogue: SFGs
More frequencies
logSFR
Log (Msun/yr) I1
mJy … IN MH
logMsun
Lat offset
degs
Lon offset z
Size
arcsec
Pop 1
UV galaxy
Fits binary table. Python script to convert to ASCII

20. How to get it Final product will be fully released:
A set of tiered surveys available for download
Web interface to query for a different survey - TBD
Beta version available:
with details of your query (frequency channels, depth, sky area)
I’ll make catalogues available to you trough web link

21. Conclusions