The Colour-Magnitude Relation of Early-Type Galaxies in the Hubble Deep Field

Details The Colour-Magnitude Relation of Early-Type Galaxies in the Hubble Deep Field The Colour-Magnitude Relation of Early-Type Galaxies in the Hubble Deep Field

1998-10-08

arxiv.org/abs/astro-ph/9810138v1

Astrophys.Space Sci. 276 (2001) 979-981

Astronomy and Astrophysics

Astrophysics

7 pages, including 2 figures, Submitted to MNRAS

Scientific paper

10.1023/A:1017520213745

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 around half of the early-type galaxies in the field at this redshift are as old as those in rich clusters.

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