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| Paper: |
Around the Tarantula and into the Arches: A Salpeter IMF in the Field and in Clusters |
| Volume: |
440, UP2010: Have Observations Revealed a Variable Upper End of the Initial Mass Function? |
| Page: |
39 |
| Authors: |
Selman, F. J.; Espinoza, P.; Melnick, J. |
| Abstract: |
We propose that NGC 2070, the ionizing cluster of the Tarantula nebula,
has the best determined stellar initial mass function (IMF), and that with a power-law slope
at 2.17±0.05 it defines what we call Salpeter.
The result of a Bayesian analysis of data for the field of the 30 Doradus
super-association and for the Arches cluster near the galactic center, previously
thought as counter-examples to the universality hypothesis, show that both
of them are consitent with a Salpeter slope.
We also show that there is no contradiction in principle to have the same stellar mass
function in clusters and in the field population independently of what the cluster mass function is. |
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