An Optimized H_β Index for Disentangling Stellar Clusters and Galaxy Ages
We have derived a new H_{β} absorption index definition, which is fully optimized as an age indicator for old and intermediate-aged stellar populations. Rather than using stellar spectra, we employed theoretical SEDs at moderately high resolution for simple stellar populations of different ages and metallicities. The new index, which is virtually
Cervantes-Rodriguez, J. L. et al.
Fecha de publicación:
12
2007