1. Cassio Leandro Barbosa
W51 IRS2
Cassio Leandro Barbosa

2. Outline What we know What we don't know
T-ReCS, NIFS PseudoLong Slit Analysis
(PLSA)‏
What we don't know
NIFS Principal Component Analysis (PCA)‏
Pilot project on PCA of HII regions
Questions not allowed for this part!

3. W51 IRS2 introducing

4. W51 IRS2

5. W51 IRS2

6. W51 IRS2

7. W51 IRS2

8. W51 IRS2 introducing the field

9. The W51 IRS2 field

10. Mid Infrared - T-ReCS

11. Near Infrared – NIFS PLS Analysis

12. Near Infrared – NIFS PLS Analysis

13. NIFS: enters the Principal Component Analysis (PCA)‏
With special thanks to Joao Steiner and Tiago Ricci (IAG-USP)‏

14. W51 – the continuum (21035A-21342A) emission (and reflection?)‏

15. Double stars? after a R-L deconvolution

16. Image and spectra “Feature enhanced” Br gamma, blue cont. and red cont.

17. Nebular emission from the lines 2. 2864 um ([Se IV]
Nebular emission from the lines um ([Se IV]? Blum & MacGregor 2008) and um

18. Nebular emission from the lines 2. 2865 ([Se IV]. )um and 2
Nebular emission from the lines ([Se IV]?)um and um

19. The He I A emission

20. The [Fe III] A emission

21. The H A emission

22. The W51-235 fragmented H2 cloud H2 at rest + red and blue wings

23. Field 233

24. W51 - Conclusions
Ideal (complicate) lab for massive star formation: all stages of MSF in a such small region.
2 naked O3 (and where are the mid/late O??)‏
3 UCHII regions
1 (or 3?) MYSO with disk
1 younger MYSO producing a jet(?)‏
Photoionized nebulae (high/medium)‏
Non-fragmented H2 clouds
Fragmented H2 clouds
More stars to come or ionization front?

25. Let's party