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2002MNRAS.336.1342W - Mon. Not. R. Astron. Soc., 336, 1342-1350 (2002/November-2)
Old elliptical galaxies at z ≃ 1.5 and the Kormendy relation.
WADDINGTON I., WINDHORST R.A., COHEN S.H., DUNLOP J.S., PEACOCK J.A., JIMENEZ R., McLURE R.J., BUNKER A.J., SPINRAD H., DEY A. and STERN D.
Abstract (from CDS):
We have compared these two LBDS radio galaxies with the Kormendy relations of ten 3CR radio galaxies at z ≃ 0.8 and a sample of cluster ellipticals at z ∼ 0.4. The LBDS galaxies follow the Kormendy relation for the more radio-luminous 3CR galaxies, assuming passive evolution of their stellar populations, although they are smaller than the 3CR galaxies whose mean effective radius is 12 kpc. Their sizes and radio luminosities are consistent with scaling relations applied to the 3CR galaxies, in which both radio power and effective radius scale with galaxy mass. Compared with the sample of cluster ellipticals, 53W069 and 53W091 lie well within the scatter of the Kormendy relation. We conclude that the hosts of these millijansky radio sources at z ≃ 1.5 are passively evolving elliptical galaxies that will evolve into ordinary L * ellipticals by the present day.
Abstract Copyright: RAS
Journal keyword(s): galaxies: active - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: individual: LBDS 53W069 - galaxies: individual: LBDS 53W091
Simbad objects: 10
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