1. Daniel Ceverino (HU) Potsdam, 2009 Avishai Dekel (HU), Reem Sari(HU), Tobias Goerdt(HU), Anatoly Klypin (NMSU) High-Redshift Clumpy Disks & Bulges in Cosmological Simulations

2. From Disks to Bulges Elmegreen et al. 2009 Genzel et al. 2008 Rest-frame UV Rest-frame visible

3. Cold Streams & Hot halos at z=2.3 2R vir =140 kpc M vir =4 10 11 M Cold Gas (T<10 5.5 K)Hot Gas (T>10 5.5 K) R vir Disk Streams

4. Gravitationally Unstable Disks 15 kpc log (M /pc 2 ) Clumps !! Gas Surface Density

5. More Clumpy Galaxies 10 kpc Gas Surface Density Face-on viewEdge-on view

6. Star Formation Maps 10 kpc Face-on viewEdge-on view in log(M /yr/kpc 2 )

7. A Massive Bulge 10 kpc Face-on viewEdge-on view Stellar Surface Density

8. More Clumpy Disks Gas Surface Density 10 kpc

9. SINS and Simulations Data (Red circles) from Forster Schreiber et al. 2009 Data (Red circles) from Cresci et al. 2009 SFR vs Stellar Mass Stellar Mass vs Max. Velocity

10. Clumps Evolution (400 Myr)

11. Clump Formation 8 kpc

12. Clump Migration 8 kpc

13. Steady-State Regime z=1.9 z=1.6 z=1.3

14. Summary

15. The End

16. Artificial Fragmentation