Survey for Transiting Extrasolar Planets in Stellar Systems. II. Spectrophotometry and Metallicities of Open Clusters Academic Article uri icon


  • We present metallicity estimates for seven open clusters based on spectrophotometric indices from moderate-resolution spectroscopy. Observations of field giants of known metallicity provide a correlation between the spectroscopic indices and the metallicity of open cluster giants. We use 2 analysis to fit the relation of spectrophotometric indices to metallicity in field giants. The resulting function allows an estimate of the target-cluster giants' metallicities with an error in the method of 0.08 dex. We derive the following metallicities for the seven open clusters: NGC 1245, [M/H] = -0.14 0.04; NGC 2099, [M/H] = +0.05 0.05; NGC 2324, [M/H] = -0.06 0.04; NGC 2539, [M/H] = -0.04 0.03; NGC 2682 (M67), [M/H] = -0.05 0.02; NGC 6705, [M/H] = +0.14 0.08; NGC 6819, [M/H] = -0.07 0.12. These metallicity estimates will be useful in planning future extrasolar planet transit searches, since planets may form more readily in metal-rich environments. 2005. The American Astronomical Society. All rights reserved.

published proceedings

  • The Astronomical Journal

author list (cited authors)

  • Marshall, J. L., Burke, C. J., DePoy, D. L., Gould, A., & Kollmeier, J. A.

citation count

  • 15

complete list of authors

  • Marshall, JL||Burke, Christopher J||DePoy, DL||Gould, Andrew||Kollmeier, Juna A

publication date

  • October 2005