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 with considerable scatter, a red sequence 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 |
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Pages (from-to) | 979-981 |
Number of pages | 3 |
Journal | Astrophysics and Space Science |
Volume | 276 |
Issue number | 2-4 |
DOIs | |
Publication status | Published - 2001 |
Externally published | Yes |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science