Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-07-20
Astronomy and Astrophysics
Astrophysics
11 pages, 5 figures included + 2 external, LaTeX file uses Cargesepasp.sty, to be published in ASP Conf.Series "From Darkness
Scientific paper
If star formation depends strongly on the global properties of the environment in which they form, the slope of the IMF as well as the upper and lower mass cut-offs would be expected to vary significantly between violent starbursts and more quiescent star forming regions. To test this hypothesis we observed the stellar content of the two closest massive star forming regions, 30Doradus and NGC3603 with HST/NICMOS and VLT/ISAAC. Our observations are the most sensitive observations made to date of dense starburst cores, allowing us to investigate its low-mass stellar population with unprecedented quality. The NIR luminosity function of 30Doradus shows no evidence for a truncation down to at least 1 M_o, its stellar core R136 is populated in low-mass stars to at least 2 M_o and NGC3603, which is very similar to R136, down to 0.1 M_o. Our observations clearly show that low-mass stars do form in massive starbursts.
30Doradus-Team the
Brandl Bernhard
NGC3603 the
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