1. Recent star formation history in NGC 346
Eva Hennekemper
(Supervisor Th.Henning, D.Gouliermis, W. Brandner)
Studentsworkshop

2. Small Magellanic Cloud
Source:

3. NGC 346: Bright stellar association Distance Modulus m-M=18.9mag
Metallicity z = 0.004
Source:

4. Components of N66
SNR B
SNR B

5. CMD of central area of the association NGC 346
Isochrones 1.0 to 15Myrs
Age of NGC 346 could be 4 Myrs!

6. Recent star formation history of N66 I
OB stars and super novas are triggering the star formation process:
In the bar 33 bright OB stars(Massey et al ):
evolve rapidly, ionize the cloud
blow the cloud material away
build up a photoionized region at which borders between the ionized cavity and the molecular gas of the parental GMC star formation takes place(Rubio et al. 2000)

7. PMS clusters in N66

8. New species of clusters?
clustering like in Milky way

9. YSO candidates found with Spitzer observations

10. Recent star formation history of N66 II
Shocks from super novas trigger the star formation:
SNR B
cluster 4: Age ~0.5 and 5Myrs(HST data)
observed YSO (Spitzer data)
SNR B
Cluster 1: Age ~5 and 15 Myrs(HST data)
produced together with the SNR
Cluster 2,3: Age ~ 0.25 and 2.5Myrs(HST data)
observed YSO(Spitzer data)

11. The End