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Galaxy Groups at 0.3 <= z <= 0.55. II. Evolution to z ~ 0

Abstract:

We compare deep Magellan spectroscopy of 26 groups at 0.3 <= z <= 0.55, selected from the Canadian Network for Observational Cosmology 2 field survey (CNOC2), with a large sample of nearby groups from the 2PIGG catalogue (Eke et al., 2004). We find that the fraction of group galaxies with significant [OII] emission (>=5\AA) increases strongly with redshift, from ~29% in 2dFGRS to ~58% in CNOC2, for all galaxies brighter than ~ M*+1.75. This trend is parallel to the evolution of field...

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Publication status:
Published

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Journal:
Mon.Not.Roy.Astron.Soc.
Volume:
358
Issue:
1
Pages:
88-100
Publication date:
2005-01-11
DOI:
ISSN:
0035-8711
URN:
uuid:9a2a0313-3233-46b3-9325-8f63a0be3463
Source identifiers:
333784
Local pid:
pubs:333784
Keywords:

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