Galactic Disk Abundance Gradients and the 10 kpc Rg Region

Details Galactic Disk Abundance Gradients and the 10 kpc Rg Region Galactic Disk Abundance Gradients and the 10 kpc Rg Region

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21944105m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #441.05

Astronomy and Astrophysics

Astronomy

Scientific paper

We examine the radial abundance gradient in the Milky Way disk via homogeneously determined data for 124 Galactic planetary nebulae. With O, Ne, S, Cl, and Ar available and a range of galactocentric distance (Rg) from 0.9 to 21 kpc, we explore the gradient by statistically analyzing a series of short segments of increasing average Rg. Though the detailed nature of the radial gradient remains somewhat uncertain, we find the short segments support a discontinuity at Rg 10 kpc, consistent with that shown via open clusters, hence providing a potential constraint on the dynamic history of the Galactic disk.

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