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

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

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

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

Optical mags of uJy radio sources (Richards + 99)

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?

Properties of optically bright (I<23 Properties of optically bright (I<23.5) uJy radio sources (Chapman + 02) <M_I>= -22.5+/-1.5 I=23.5 (spiral) ULIRGs/AGN LIRGs ‘spirals’

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

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

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?)

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)

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

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

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

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

Radio-FIR correlation: CMB inverse Compton losses?

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

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

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

Submm galaxies and radio astrometry (Smail + 99)

Major themes: COSMOS - Project Outline 1.4 deg x 1.4 deg field @ 10:00:28.6 +02:12:21 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

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

VLA/Cosmos 2deg survey

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