Work in progress A visual comparison between mock catalogues and 6dF data
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Transcript of Work in progress A visual comparison between mock catalogues and 6dF data
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]
General views
6dFMock 1 general
Mock 2 general 6dF
Mock 3 general 6dF
6dFMock 4 general
6dFMock 5 general
6dFMock 6 general
6dFMock 7 general
6dFMock 8 general
6dFMock 9 general
6dFMock 10 general
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.
Close-up views
Mock 1 Close up 6dF
Mock 2Close up
6dF
Mock 3Close up 6dF
6dFMock 4Close up
6dFMock 5Close up
6dF
Mock 6Close up
6dF
Mock 7Close up
6dF
Mock 8Close up
6dF
Mock 9Close up
6dFMock 10Close up
In general the mock catalogues seem ‘too busy’ compared to 6dF. 6dF shows much more open space. Mock catalogue 1 seems the best fit.
Very close up
Mock 1Very close
6dF
Mock 2Very close
6dF
Mock 3Very close
6dF
6dF
Mock 4Very close
6dF
Mock 5Very close
6dF
Mock 6Very close
6dF
Mock 7Very close
6dF
Mock 8Very close
6dF
Mock 9Very close
6dF
Mock 10Very close
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.