Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530804j&link_type=abstract
American Astronomical Society, AAS Meeting #215, #308.04; Bulletin of the American Astronomical Society, Vol. 42, p.306
Other
Scientific paper
Recent studies of the radial chemical abundance distribution of the Milky Way disk have shown a change in the metallicity distribution around Galactocentric distance Rgc 10 kpc, as first noted by Twarog et al. (1997). Here the gradient in [Fe/H] appears to level off, with the metallicity dropping to [Fe/H] -0.3 in the outer disk. However, the nature of the transition between the inner and outer disk has been poorly constrained. Here, we describe an abundance analysis of 19 open clusters with Rgc 9-13 kpc based on high resolution spectroscopy of red giant stars. Chemical abundances have been determined for Fe, light- and α-elements. After combination of our sample with others from the literature, a statistical analysis of the radial element abundance distributions is performed to determine the nature of the transition between the inner and outer Galactic disk.
Friel Eileen D.
Jacobson Heather R.
Pilachowski Catherine A.
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