Work in progress A visual comparison between mock catalogues and 6dF data
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Work in progressA visual comparison between mock
catalogues and 6dF dataMock catalogues from Shaun Cole, Durham Astrophysics Theory group and VIRGO consortium The surfaces shown enclose minimal spanning trees formed by a maximum percolation distance of 100 km/s and with a minimum of 50 member galaxies. The view is towards the South Celestial Pole, Northern Galactic Hemisphere to the left, Southern Galactic Hemisphere towards the right. The 6dF data (early 2005) used here is a bit thin towards the centre (i.e. towards the SCP).The images can, if necessary, be viewed in 3D with ChromoDepth spectacles. Otherwise depth can be perceived by white=near, blue=far.
Tony Fairall, Department of Astronomy, University of Cape Town.Feb 2006 using ‘Labyrinth’ software developed by Carl HultquistAnd Samesham [email protected]
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General views
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6dFMock 1 general
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Mock 2 general 6dF
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Mock 3 general 6dF
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6dFMock 4 general
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6dFMock 5 general
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6dFMock 6 general
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6dFMock 7 general
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6dFMock 8 general
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6dFMock 9 general
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6dFMock 10 general
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Comments: The general similarity of texture speaks well for the simulations, and the differences are often more subtle than obvious. Void sizes is one discriminator, proportion of open space another.
Not knowing the parameters of the mock catalogues, I could take an unbiased view. The best match in my opinion was with Mock catalogue number 2.
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Close-up views
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Mock 1 Close up 6dF
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Mock 2Close up
6dF
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Mock 3Close up 6dF
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6dFMock 4Close up
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6dFMock 5Close up
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6dF
Mock 6Close up
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6dF
Mock 7Close up
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6dF
Mock 8Close up
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6dF
Mock 9Close up
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6dFMock 10Close up
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In general the mock catalogues seem ‘too busy’ compared to 6dF. 6dF shows much more open space. Mock catalogue 1 seems the best fit.
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Very close up
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Mock 1Very close
6dF
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Mock 2Very close
6dF
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Mock 3Very close
6dF
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6dF
Mock 4Very close
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6dF
Mock 5Very close
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6dF
Mock 6Very close
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6dF
Mock 7Very close
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6dF
Mock 8Very close
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6dF
Mock 9Very close
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6dF
Mock 10Very close
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In general, the mock catalogues seem too crowded, and have far too little open spaces, compared to 6dF. The Mock catalogues suggest a fractal structure that repeats on ever smaller scales, while 6dF seems to ‘go no further’.
Best match, in my opinion, would be Mock catalogue 1.