Probing the Low-Mass Population in IC 2391: Constraining the IMF and Identifying Candidate Debris Disks

Details Probing the Low-Mass Population in IC 2391: Constraining the IMF and Identifying Candidate Debris Disks Probing the Low-Mass Population in IC 2391: Constraining the IMF and Identifying Candidate Debris Disks

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..951p&link_type=abstract

COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.

Physics

Low Luminosity Stars, Subdwarfs, And Brown Dwarfs, Star Formation, Circumstellar Shells, Clouds, And Expanding Envelopes, Circumstellar Masers

Scientific paper

The formation of low-mass stars and brown dwarfs and their disks is a hot observational topic. Such studies also holds important keys for the clarification of the planet formation mechanism. Because of its proximity (150 pc) and young age (30-50 Myr), the IC2391 open cluster is an ideal location for such studies.
We present the results of a deep optical survey of IC 2391 performed by using the Wide-Field Imager at the ESO 2.2 m telescope. These data, in combination with near-infrared photometry from 2MASS, allowed us to uncover new low-mass members and brown dwarfs in IC 2391 and put further constrains on the shape of the low-mass initial mass function (IMF) in this cluster, which is currently under debate. Moreover, by using data from the Spitzer space telescope, we identify a dozen of possible debris-disk objects in the cluster and investigate their disk properties using appropriate models of circumstellar disks.

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