1. 1.4 GHz Source Counts (Hopkins 2000)
AGN
steep
flat
starbursts
spirals
SKA EVLA HDF/COSMOS++ 1st/NVSS Cambridge

2. 1.4 GHz uJy source counts (Schinnerer et al. 04)

3. COSMOS Pilot/ACS (Schinnerer + 04)
1.4 GHz, 1.5”, 25uJy rms I_AB(5s) = 27

4. VLA-COSMOS vs. HST morphologies2”
z ~ 0.2 2”
z ~ 0.2 2”
z ~ 1.3
z ~ 1.0 2”

5. Optical mags of uJy radio sources (Richards + 99)

6. Optical IDs and redshifts of uJy radio sources (Haarsma + 00)
Ellipticals/emission line
unclear
Faint/red
Spiral/Irr/merging
50% = spirals/Irr/mergers = star forming galaxies at z<1.3
25% = ellipticals/liners = low luminosity AGN at z= 0.3 to 1.5
25% = optically faint/red = high z starbursts? very high z AGN?

7. Properties of optically bright (I<23
Properties of optically bright (I<23.5) uJy radio sources (Chapman + 02)
<M_I>= /-1.5
I=23.5 (spiral)
ULIRGs/AGN
LIRGs
‘spirals’

8. Spectral index distribution uJy radio sources (8GHz selected; Fomalont + 02)
<SI> = -0.75

9. Angular two-point correlation function from Pheonix survey (Georgakakis99)2’

10. Relation to (sub)mm galaxies (Barger, Chapman, Blain, Dannerbauer,…)
30-40% of I>24, uJy radio sources = S_850 > 6mJy
= 70% of total submm gal population (other sources?)

11. Radio photometric redshifts
55K => z=4.1
65K => z=5.1
Temperature – redshift degeneracy: measure (1+z)/T_D (Blain 1999)
Photometric redshifts for NTTDF MAMBO sources: radio vs. optical (Dannerbauer)

12. Radio photometric redshifts: uJy radio sources (Chapman + 02)
30K
T_D=50K

13. Radio-FIR correlation: SDSS galaxies (Yun + 02)

14. Redshift evolution of radio-FIR correlation: Spitzer First Look survey (Appleton + 04)

15. Radio-FIR correlation: into the epoch of reionization
T_D=50K
z = 4.7, 4.4

16. Radio-FIR correlation: CMB inverse Compton losses?

17. Test sources: only upper limits of 1”
uJy radio source sizes: COSMOS pilot project (Schinnerer04) –VLA only = 1.4” res
Test sources: only upper limits of 1”
deconvolved
Gaussian fit

18. Submm galaxy sizes: MERLIN/VLA/HST (0.3” res)
2/3 = 1”
1/3 < 0.3” 3”

19. 1202-0725 z=4.7 QSO+starburst (Momjian04)
VLBA
2” 1.4 GHz
0.2”=res
0.02” res
Ly a + CO 2-1
z=4.7 QSO+starburst (Momjian04)
Size=0.2” (1kpc) & T_B = 1e5 K => starburst

20. Submm galaxies and radio astrometry (Smail + 99)

21. Major themes: COSMOS - Project Outline
1.4 deg x 1.4 deg 10:00: :12:21
Major themes:
Assembly of galaxies, clusters & dark matter
on scales up to ~ 2 x 1014 Msun
Reconstruction of dark matter distribution out to z ~ 1
using weak lensing
Evolution of galaxy morphology, galactic merging and
star formation as a function of LSS & redshift
Evolution of AGN/dependence of black hole growth
on galaxy morpholgy and environment

22. VLA-COSMOS - Large Project
16 x
4 x
8 x
16,000 x 16,000
pixels
0.34”/pixel
10/40 days
quick-look
rms ~ 19mJy/beam

23. VLA/Cosmos 2deg survey

25. mJy radio sources: an update
Ringmerg04 C. Carilli, NRAO
Four types of radio surveys (all 1.4 GHz)
Very, very wide field, shallow: NVSS – 1mJy, 60”, full sky; FIRST – 1 mJy, 5”, ¼ sky => mostly AGN
Very wide fields, moderate depth: Spitzer 1st look – 0.1mJy, 5”, 10 deg^2
Wide field, deep: COSMOS – 0.04 mJy, 1.4”, 2 deg^2 => star forming gals z<=1
Narrow field, very deep: many – 0.02 mJy, 1.4”, 0.2 deg^2
Relevance of mJy radio sources:
Reveals dust obscured galaxy formation, and type II AGN (to very high redshift)
Complementary to submm (mostly lower z), plus possible proxy at higher z
provides sub-arcsec astrometry, imaging
evolution of radio-FIR correlation: physics of star forming galaxies (B, CRs)
radio photometric redshifts