1. Magic of (sub)mm Biased to > ULIRGs 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)
SCUBA 20mJy
Optical Gal
Submm Gal
Comparable SFR at high z in dusty starbursts (“submm gal”) as optically selected galaxies, forming giant elliptical galaxies?
SMA/Spitzer

3. COSMOS/MAMBO 250 GHz survey: dusty galaxy formation
Bertoldi, Carilli, Schinnerer, Voss, Smolcic +
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

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

5. COSMOS: Immediate Gratification

6. Radio – MAMBO: > 4s = 9/14 (<4”)
‘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
Submm gal
Radio photo (limits)
Radio photo (det)
Lensing: 1 or 2
Spurious: 1 or 2

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

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 > K_vega > 19.7
Z > 3.3 ?
COSBO 9
250 GHz = 4.9 +/-0.9
1.4 GHz < 36 uJy
HST I > 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