Ages, metallicities and $\alpha$-element enhancement for galaxies in Hickson compact groups

C. Mendes de Oliveira, P. Coelho, J. J. González +1

Central velocity dispersions and eight line-strength Lick indices have been determined from 1.3$\mathring{\mathrm{A}}$ resolution long-slit spectra of 16 elliptical galaxies in Hickson compact g…