Galaxy Mergers: A Search for Chemical Signatures
  We have gathered high resolution echelle spectra for more than two dozen high-velocity metal-poor field stars, including BD+80 245, a star previously known to have extremely low [alpha/Fe] abundances, as well as G4-36, a new low-alpha star with unusually large [Ni/ Fe]. In this kinematically selected sample, other chemically anomalous stars have also been uncovered. In addition to deriving the alpha-element abundances, we have also analysed iron-group and s-process elements. Not only does chemical substructure exist in the halo, but the chemical anomalies are not all the same within all elemental groups. 
Inese I. Ivans (1), Bruce Carney (2), Luisa de Almeida (2), Chris   Sneden (1) ((1) Univ. of Texas at Austin; (2) Univ. of N...