NOAO > Observing Info > Approved Programs > 2002B-0254
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NOAO > Observing Info > Approved Programs > 2002B-0254 |
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PI: Steven J. Margheim, Indiana University, stevem@astro.indiana.edu
Address: Swain West 319, 727 E 3rd St, Bloomington, IN 47405-7105
CoI: Constantine P. Deliyannis, Indiana University
Title: Abundance Signatures of Stars with Planets in the Praesepe Cluster
Abstract:
The elemental abundance of stars with planets (SWPs) has been
studied in an attempt to identify, a) processes favorable for planetary
formation, or b) products of planetary formation. The observation of a
higher mean metallicity in SWPs (compared to field stars) may be the
result of high primordial abundance, ingestion of high-Z material, or
some other source. Open clusters provide tremendous advantages over
field stars in searching for elemental signatures of planet formation
because the stellar parameters are much better constrained and the
stellar evolutionary stage is known quite accurately. In the long term,
we can study the evolution of these processes because we know the age of
the clusters. We propose to use HET/HRS and KPNO-4m Echelle to
determine precise relative abundances for 52 single members of the
Praesepe star cluster to look for the signatures of planetary formation
and to distinguish between primordial high metallicity for SWPs and the
accretion of planetessimals.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2002B-0254 |
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