We present an abundance analysis of the heavy elements Zr , Ba , La , Ce , and Nd for Hyades cluster F-K dwarfs based on high resolution , high S/N ratio spectra from Keck/HIRES .
The derived abundances show the stellar members to be highly uniform , although some elements show a small residual trend with temperature .
The rms scatter for each element for the cluster members is as follows ; Zr = 0.055 dex , Ba = 0.049 dex , Ce = 0.025 dex , La = 0.025 dex , Nd = 0.032 dex .
This is consistent with the measurement errors , and implies that there is little or no intrinsic scatter among the Hyades members .
Several stars thought to be non-members of the cluster based on their kinematics are found to deviate from the cluster mean abundances by about 2 \sigma .
Establishing chemical homogeneity in open clusters is the primary requirement for the viability of chemically tagging Galactic disk stars to common formation sites , in order to unravel the dissipative history of early disk formation .