1. OB Spectral and Spatial Morphology from Carina to the Antennae Nolan R. Walborn Space Telescope Science Institute HotSci STScI August 17, 2011

2. Walborn Diagram

3. Optical O Main Sequence N IV/III He II/I

4. UV O Main Sequence (No Si IV)

5. UV OB Main Sequence (No Si IV)

6. Optical Early O Supergiant Sequence N IV/III

7. Optical OB Supergiant Sequence Si IV/III/II

8. UV O Supergiant Sequence Si IV!

9. UV B Supergiant Sequence Si IV!

10. FUV O Supergiant Sequence (O VI, C III)

11. Optical O Luminosity Sequence (He II λ4686, N III λ4640)

12. UV O Luminosity Sequence (Si IV! 45 eV)

13. FUV O Luminosity Sequence (S IV 47 eV, C III 48 eV, P V 65 eV but low abundance!)

14. X-Ray OB Supergiant Sequence Si XIV/XIII Mg XII/XI Ne X/IX O VIII/VII

15. X-Ray OB Main Sequence Si XIV/XIII Mg XII/XI Ne X/IX O VIII/VII

16. New Of?p Stars GOSSS J. Maiz Apellaniz et al. ApJS 193, 24 (2011)

17. Ofc Spectra GOSSS

18. ONn Spectra GOSSS

19. VFTS C. Evans et al., A&A 530, A108 (2011) All Single O Stars

21. Vz Stars

22. J. Maiz Apellaniz in prep.

24. Vn/nn/nnn Stars (red)

25. H. Sana

29. VISTA Blue J Spitzer Green 4.5 Red 8 micron R. Barba et al in prep.

31. N11 LMC

34. NGC 5471 M101

36. Region G has only a single dominant central cluster (brightest in the Antennae), but again shows evidence for some weak triggering. The mass in the intermediate age clusters is only about 5 % of the mass of the central cluster, hence the triggered star formation is a relatively minor effect. Note the beautiful H_alpha shells, which have expanded unimpeded to the left, but have run into material and appear to have formed clusters in other directions Region G B. Whitmore et al. (2010)

37. We find a smooth gradient in the ages! In addition, the supershell is centered on the old cluster, and the young clusters are located where the shell intersects the dust lane ! The young clusters have a total mass of 4 E6 Msolar, 5 times more than the cluster that appears to have triggered their formation. Triggering is not always weak ! Region B

38. Antennae SpitzerHST/ACS

39. <1 Myr 1-2 Myr 3-4 Myr 4-5 Myr 7-9 Myr B S G