T. A. Saurin, E. Bica, C. Bonatto
It is currently widely accepted that open star clusters and stellar
associations result from the evolution of embedded star clusters. Parameters
such star formation efficiency, time-scale of gas removal and velocity
dispersion can be determinants for their future as bound or unbound systems.
Finding objects at an intermediate evolution state can provide constraints to
model the embedded cluster evolution. Trumpler 37 in the HII region IC1396 is
an extended young cluster that presents characteristics of an association. We
employed 2MASS photometry to analyse its structure, stellar content and
determine its astrophysical parameters. We also analyse 11 bright-rimmed clouds
in IC1396 in order to search for young infrared star clusters, and the
background open star cluster Teutsch 74, to verify whether it has any
contribution to the observed stellar density profile of Trumpler 37. The
derived parameters and comparison with template objects from other studies lead
us to conclude that Trumpler 37, rather than as a star cluster, will probably
emerge from its molecular cloud as an OB association.
View original:
http://arxiv.org/abs/1201.2704
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