1. Magic of (sub)mm L _FIR = 1.5e12 L _sun 3mJy  Distance independent probe of universe  Biased to > ULIRGs

2. Submm surveys: Probing the epoch of “galaxy formation” (z=1.5 – 3.5) Optical Gal Submm Gal Comparable SFR at high z in dusty starbursts (“submm gal”) as optically selected galaxies, forming giant elliptical galaxies? SMA/Spitzer SCUBA 20mJy

3. COSMOS/MAMBO 250 GHz survey: dusty galaxy formation MAMBO/30m  117 pixels  250 GHz  10.6”  0.9 mJy rms  20’ x 20’ Goals:  z distribution + contribution SFHU  Environments  AGN fraction  highest z starbursts?  evol radio-FIR Bertoldi, Carilli, Schinnerer, Voss, Smolcic +

4. Latest counts including COSBO – scaled to 350 GHz assuming T _D = 40 K PL Index=-2.7 7mJy 1e13 L_sun COSMOS: 14 srcs >4  23 srcs > 3.5 

5. COSMOS: Immediate Gratification

6.  Radio – MAMBO: > 4  = 9/14 (<4”)  Radio – MAMBO: > 3.5  = 2/9  ‘Optical’ – Radio – MAMBO: [6-9]/23 (<1”)  MAMBO – Xray: 2/23  Complex morphology: multiple radio = 4/14  Complex MAMBO: 5/14

7. Redshift Distribution Opt photo Radio photo (det) Radio photo (limits) Submm gal  Lensing: 1 or 2  Spurious: 1 or 2

8. Difficulties with redshifts: templates and ambiguities Z_radZ_opt (1,2) Optical phot z Radio phot z: (1+z) \propto T _D 20K 60K Z_rad, Z_opt(2)Z_opt (1)

9. COSBO 7 Z_rad = 3.3 Z_opt = 0.45

10. Radio and opt faint submm galaxies (10-20%): highest z (> 3) starbursts (4 secure srcs)? COSBO 1: brightest mm source 250 GHz = 6.3+/-0.9 mJy 1.4 GHz = 31 +/- 10 uJy HST I > 27 K_vega > 19.7 Z > 3.3 ? COSBO 9 250 GHz = 4.9 +/-0.9 1.4 GHz < 36 uJy HST I > 27 K_vega > 19.7 Z > 3.7 ?

11. COSBO  2005/6: 90hr  Spitzer  Spectroscopy

12. END

13. UV selected galaxies – large range in bolometric luminosity, but little correlation of L _uv and L _bol Adelberger 2000