NOAO >   Observing Info >   Approved Programs >   2003B-0369

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Proposal Information for 2003B-0369


PI: Carlos Roman-Zuniga, University of Florida, carlos@astro.ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, Gainesville, Fl 32611, USA

CoI: Elizabeth A. Lada, Astronomy Dept., Univ. of Florida

Title: Investigating the Role of OB stars in Determining the LifetImes of Circumstellar Disks

Abstract: We propose to use the detector NIRI in its f/14 mode at Gemini North to obtain deep images in J, H, K and L^\prime of the young cluster NGC 2244 associated with the Rosette Nebula. These observations will be used to study how circumstellar disks are affected in the presence of a large number of OB stars at early stages of cluster evolution and how this effect varies at different cluster radii. These data will be compared to similar observations of the cluster IC 348, which is almost of the same age as NGC 2244 but has no O stars. As the Rosette Nebula is located at a distance of 1.6 Kpc, i.e. 5 times further away than IC 348, we require to observe stars that are 3.5 magnitudes fainter (L=16). Gemini is the only telescope at which we can achieve these sensitivity limits in a reasonable amount of time.


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