LINE-STRENGTH GRADIENTS IN THE BULGE COMPONENTS OF NGC-3190 AND NGC-1023

We present spectral changes measured across the bulge of an edge-on sp iral (Sa) galaxy, NGC 3190, and an edge-on lenticular galaxy, NGC 1023 , probing spatial metallicity and stellar population changes. We find that gradients in spectral line strengths are measurable in the bulge of the spiral galaxy. The lenticular galaxy shows a sharp increase in strength of spectral absorption features towards the galaxy centre, wi th more gradual gradients further out. Outside the central 1 or 2 arcs ec we find no significant difference from gradients found in many elli pticals, indicating that similar amounts of dissipation could have occ urred in the formation of ellipticals and the two bulges studied here.