nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics
© 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a comparison of major methodologies of fast generating mock halo or galaxy catalogues. The comparison is done for two-point (power spectrum and two-point correlation function in real and r...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/56367 |
| _version_ | 1848759857269702656 |
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| author | Chuang, C. Zhao, C. Prada, F. Munari, E. Avila, S. Izard, A. Kitaura, F. Manera, M. Monaco, P. Murray, Steven Knebe, A. Scóccola, C. Yepes, G. Garcia-Bellido, J. Marín, F. Müller, V. Skibba, R. Crocce, M. Fosalba, P. Gottlöber, S. Klypin, A. Power, C. Tao, C. Turchaninov, V. |
| author_facet | Chuang, C. Zhao, C. Prada, F. Munari, E. Avila, S. Izard, A. Kitaura, F. Manera, M. Monaco, P. Murray, Steven Knebe, A. Scóccola, C. Yepes, G. Garcia-Bellido, J. Marín, F. Müller, V. Skibba, R. Crocce, M. Fosalba, P. Gottlöber, S. Klypin, A. Power, C. Tao, C. Turchaninov, V. |
| author_sort | Chuang, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a comparison of major methodologies of fast generating mock halo or galaxy catalogues. The comparison is done for two-point (power spectrum and two-point correlation function in real and redshift space), and the three-point clustering statistics (bispectrum and three-point correlation function). The reference catalogues are drawn from the BigMultiDark N-body simulation. Both friend-of-friends (including distinct haloes only) and spherical overdensity (including distinct haloes and subhalos) catalogues have been used with the typical number density of a large volume galaxy surveys. We demonstrate that a proper biasing model is essential for reproducing the power spectrum at quasi-linear and even smaller scales. With respect to various clustering statistics, a methodology based on perturbation theory and a realistic biasing model leads to very good agreement with N-body simulations. However, for the quadrupole of the correlation function or the power spectrum, only the method based on semi-N-body simulation could reach high accuracy (1 per cent level) at small scales, i.e. r < 25 h < sup > -1 < /sup > Mpc or k > 0.15 h Mpc < sup > -1 < /sup > . Full N-body solutions will remain indispensable to produce reference catalogues. Nevertheless, we have demonstrated that the more efficient approximate solvers can reach a few per cent accuracy in terms of clustering statistics at the scales interesting for the large-scale structure analysis. This makes them useful for massive production aimed at covariance studies, to scan large parameter spaces, and to estimate uncertainties in data analysis techniques, such as baryon acoustic oscillation reconstruction, redshift distortion measurements, etc. |
| first_indexed | 2025-11-14T10:06:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-56367 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:06:33Z |
| publishDate | 2015 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-563672018-03-29T09:09:13Z nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics Chuang, C. Zhao, C. Prada, F. Munari, E. Avila, S. Izard, A. Kitaura, F. Manera, M. Monaco, P. Murray, Steven Knebe, A. Scóccola, C. Yepes, G. Garcia-Bellido, J. Marín, F. Müller, V. Skibba, R. Crocce, M. Fosalba, P. Gottlöber, S. Klypin, A. Power, C. Tao, C. Turchaninov, V. © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a comparison of major methodologies of fast generating mock halo or galaxy catalogues. The comparison is done for two-point (power spectrum and two-point correlation function in real and redshift space), and the three-point clustering statistics (bispectrum and three-point correlation function). The reference catalogues are drawn from the BigMultiDark N-body simulation. Both friend-of-friends (including distinct haloes only) and spherical overdensity (including distinct haloes and subhalos) catalogues have been used with the typical number density of a large volume galaxy surveys. We demonstrate that a proper biasing model is essential for reproducing the power spectrum at quasi-linear and even smaller scales. With respect to various clustering statistics, a methodology based on perturbation theory and a realistic biasing model leads to very good agreement with N-body simulations. However, for the quadrupole of the correlation function or the power spectrum, only the method based on semi-N-body simulation could reach high accuracy (1 per cent level) at small scales, i.e. r < 25 h < sup > -1 < /sup > Mpc or k > 0.15 h Mpc < sup > -1 < /sup > . Full N-body solutions will remain indispensable to produce reference catalogues. Nevertheless, we have demonstrated that the more efficient approximate solvers can reach a few per cent accuracy in terms of clustering statistics at the scales interesting for the large-scale structure analysis. This makes them useful for massive production aimed at covariance studies, to scan large parameter spaces, and to estimate uncertainties in data analysis techniques, such as baryon acoustic oscillation reconstruction, redshift distortion measurements, etc. 2015 Journal Article http://hdl.handle.net/20.500.11937/56367 10.1093/mnras/stv1289 Oxford University Press restricted |
| spellingShingle | Chuang, C. Zhao, C. Prada, F. Munari, E. Avila, S. Izard, A. Kitaura, F. Manera, M. Monaco, P. Murray, Steven Knebe, A. Scóccola, C. Yepes, G. Garcia-Bellido, J. Marín, F. Müller, V. Skibba, R. Crocce, M. Fosalba, P. Gottlöber, S. Klypin, A. Power, C. Tao, C. Turchaninov, V. nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title | nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title_full | nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title_fullStr | nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title_full_unstemmed | nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title_short | nIFTy cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics |
| title_sort | nifty cosmology: galaxy/halo mock catalogue comparison project on clustering statistics |
| url | http://hdl.handle.net/20.500.11937/56367 |