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Galaxy groups in the 2dFGRS: The group-finding algorithm and the 2PIGG catalogue

Abstract:

The construction of a catalogue of galaxy groups from the Two-degree Field Galaxy Red-shift Survey (2dFGRS) is described. Groups are identified by means of a friends-of-friends percolation algorithm which has been thoroughly tested on mock versions of the 2dFGRS generated from cosmological N-body simulations. The tests suggest that the algorithm groups all galaxies that it should be grouping, with an additional 40 per cent of interlopers. About 55 per cent of the ∼190 000 galaxies considered ...

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Authors


Norberg, P More by this author
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Journal:
Monthly Notices of the Royal Astronomical Society
Volume:
348
Issue:
3
Pages:
866-878
Publication date:
2004-03-01
ISSN:
0035-8711
URN:
uuid:ac3a77f3-6a60-4812-9be3-273778a1180f
Source identifiers:
159814
Local pid:
pubs:159814
Language:
English
Keywords:

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