Other
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9419m&link_type=abstract
HST Proposal ID #9419
Other
Hst Proposal Id #9419
Scientific paper
We propose to use the large improvement in sensitivity and wide-field resolution provided by ACS to obtain for the first time the complete 0.1 M_Sun to 100 M_Sun IMF of a single massive young cluster. We will obtain BVI + nebular deep {V 27} WFC photometry of six cluster and one background pointings and we will use the auto-parallel capacity of ACS to simultaneously acquire deep NUV+U+V photometry of selected regions in the cluster. Special care has been taken to treat all the complications which arise in the reduction of data for the purpose of calculating the IMF of a young cluster. We have chosen as our object of study N11 in the LMC because it arguably provides the best combination of stellar mass range {> 40 O stars, with several O3 stars}, spatial resolution {1 WFC pixel = 0.0125 pc}, low extinction {E{B-V} 0.1}, crowding, background confusion, and nebular contamination in comparison to other Galactic and Local Group clusters. It also has the advantage of having two separate regions, one which has already stopped forming stars and another one which is still forming them, thus allowing us to search for differences in the IMF between those two cases. The ACS data will be complemented with IR ground-based observations obtained using Gemini South, for which we already have been awarded time.
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