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

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.306..561k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 306, Issue 3, pp. 561-566.

Astronomy and Astrophysics

Astronomy

49

Scientific paper

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.

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