Abstract
We present the rest-frame colour-magnitude diagram for 35 early-type galaxies in the Hubble Deep Field with median redshift 0.9. Although they have considerable scatter, a red sequence that is well described by the passive evolution of an intrinsically old stellar population is observed. Comparison with the passively evolved colour-magnitude relation of the rich Coma cluster (z = 0.023) indicates that at least ∼1/2 of the early-type galaxies in the field at this redshift are as old as those in rich clusters.
| Original language | English |
|---|---|
| Pages (from-to) | 561-566 |
| Number of pages | 6 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 306 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1999 Jul 1 |
Keywords
- Galaxies: elliptical and lenticular, cD
- Galaxies: evolution
- Galaxies: stellar content