NOAO >   Observing Info >   Approved Programs >   2013A-0509

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Proposal Information for 2013A-0509


PI: Elizabeth J. Jeffery, James Madison University, jeffe2ej@jmu.edu
Address: Physics Department, 901 Carrier Dr, MSC 4502, Harrisonburg, VA 22801, USA

CoI: Ted von Hippel, Embry-Riddle Aeronautical University
CoI: David van Dyk, University College London
CoI: Nathan Stein, Harvard University
CoI: W.H. Jefferys, University of Texas at Austin

Title: Deep Observations of the Open Cluster NGC 6253

Abstract: We propose to use GMOS on Gemini-South to obtain deep images of the metal rich open cluster NGC 6253, observing the cluster white dwarfs for the first time. These observations are an important piece and further test of the variously proposed scenarios to explain the formation of the strange white dwarfs of the metal rich cluster open NGC 6791. We will use the proposed observations of NGC 6253 to measure a white dwarf age for the cluster and search for any anomalous features in the cluster white dwarf luminosity function. Additionally, we will identify bright (i.e., newly formed) cluster white dwarfs for spectroscopic follow up to measure their masses and empirically determine this cluster's initial- final mass relation to aid us in determining if enhanced mass loss due to metallicity is at work in this cluster, as it has been suggested to be at work in NGC 6791. Observations of the white dwarfs in NGC 6253 will be an important piece in the continuing puzzle that has important implications on mass loss, white dwarf cooling, and stellar evolution as a whole.


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NOAO >   Observing Info >   Approved Programs >   2013A-0509

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