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| Paper: |
The Cluster Birthline and the Formation of Stellar Clusters in M33 |
| Volume: |
440, UP2010: Have Observations Revealed a Variable Upper End of the Initial Mass Function? |
| Page: |
117 |
| Authors: |
Corbelli, E.; Giovanardi, C.; Grossi, M. |
| Abstract: |
We present a new method to analyze the IMF at its high mass end in young stellar
clusters, which relies on two integrated observables: the cluster bolometric and Hα luminosity.
Using several cluster samples selected in M33 we show that a stochastically sampled universal
IMF is in better agreement with the data than a truncated IMF whose maximum stellar mass
depends on cluster mass. We also discuss the possibility that a delayed formation of massive stars
is taking place in low density star forming regions as an alternative to a strong leakage of
ionizing photons from HII regions of young luminous clusters. |
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