Optical page

Spectra and gradients

Measuring spectral line-strengths and their spatial variations across spheroidal systems (ellipticals, lenticular, spiral bulges and cD galaxies). Abundance and age distributions in stars mainly determine the spectral feature strengths in integrated stellar populations. A major problem is dientangling the two effects of age and abundance. This work is in collaboration with postgraduate students and with external collaborators. See GCE description page for details.

Above is an optical image of an edge-on, spiral galaxy, showing emission from the disc and bulge.