Tightness of the color-magnitude relation of elliptical galaxies and the epoch of major galaxy merging

Details Tightness of the color-magnitude relation of elliptical galaxies and the epoch of major galaxy merging Tightness of the color-magnitude relation of elliptical galaxies and the epoch of major galaxy merging

1998-04-22

arxiv.org/abs/astro-ph/9804221v1

Astronomy and Astrophysics

Astrophysics

25 pages, 6 figures, ApJ in press

Scientific paper

10.1086/306086

We investigate a one-zone chemophotometric evolution model of disk-disk galaxy mergers in order to clarify whether or not galaxy mergers with the widely spread merging epoch can reproduce reasonably well the observed small scatter of the color-magnitude (C-M) relation in cluster ellipticals at low and intermediate redshift (z<1). We consider that merger progenitor disks begin to consume interstellar gas at moderate rate from z ~ 5 and then merge to form an elliptical with the secondary starburst at z=z_merge. We find that even if the epoch of galaxy merging is rather extended (0.3

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