The core mass function in NGC6357
Date Issued
2015
Author(s)
Abstract
The distribution over mass of stars at birth (the initial mass function, IMF) is one of the most important parameters in star-formation research. What determines the IMF is still not clear, nor is it clear whether the IMF is the same for every star forming region. It does seem, however, that the IMF is set very early on by the mass of the molecular cores out of which the stars form. The core mass function (CMF), and by consequence the IMF,
may however depend on the physical and chemical properties of the environment. We present the results of our determination of the CMF at various locations in the Galactic star-forming complex NGC 6357. We used SCUBA2 at the JCMT to observe, at 450 mu and 850 mu, the dust associated with the molecular clouds in a 30′ x 30′ (15pc x 15pc) region containing three HII regions. We assess the radiative and mechanical influence of the
stars that excite the HII regions on the molecular gas, by determining the CMF near the HII regions and comparing it with that in more quiescent (less exposed to intense stellar feedback) parts of the complex. Preliminary analysis suggests there is a difference between the CMFs.
Conferenece
Terzo Workshop sull'Astronomia Millimetrica in Italia
Conferenece place
Bologna, Italy
Conferenece date
20 - 21 Gennaio 2015
Rights
open.access
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