Spatially-resolved stellar populations of nearby galaxies in multi-filter surveys
Abstract
We have developed a new technique using a novel approach to analyze unresolved stellar populations of spatially-resolved galaxies based on large sky multi-filter surveys. We have successfully applied this technique to 42 early-type galaxies in the ALHAMBRA survey. In agreement with some previous work, we find the gradients of early-type galaxies to be on average slightly positive in age and negative in metallicity at large radii (R > Reff). These mildly negative metallicity gradients support a merging scenario. The positive/flat age gradients could support a more uniformly distributed star formation or even secondary burst triggered by mergers.
- Publication:
-
Formation and Evolution of Galaxy Outskirts
- Pub Date:
- March 2017
- DOI:
- 10.1017/S1743921316009170
- Bibcode:
- 2017IAUS..321..297S
- Keywords:
-
- galaxies: photometry;
- galaxies: elliptical;
- galaxies: evolution;
- galaxies: formation