Outputs (44)

Matter power spectrum and the challenge of percent accuracy (2016)
Journal Article
Schneider, A., Teyssier, R., Potter, D., Stadel, J., Onions, J., Reed, D. S., …Scoccimarro, R. (2016). Matter power spectrum and the challenge of percent accuracy. Journal of Cosmology and Astroparticle Physics, 2016(4), 1-21. https://doi.org/10.1088/1475-7516/2016/04/047

© 2016 IOP Publishing Ltd and Sissa Medialab srl. Future galaxy surveys require one percent precision in the theoretical knowledge of the power spectrum over a large range including very nonlinear scales. While this level of accuracy is easily obtain... Read More about Matter power spectrum and the challenge of percent accuracy.

nIFTy galaxy cluster simulations – II. Radiative models (2016)
Journal Article
Sembolini, F., Elahi, P. J., Pearce, F. R., Power, C., Knebe, A., Kay, S. T., …Teyssier, R. (2016). nIFTy galaxy cluster simulations – II. Radiative models. Monthly Notices of the Royal Astronomical Society, 459(3), 2973-2991. https://doi.org/10.1093/mnras/stw800

Sussing merger trees: stability and convergence (2016)
Journal Article
Wang, Y., Pearce, F. R., Knebe, A., Schneider, A., Srisawat, C., Tweed, D., …Lin, W. (2016). Sussing merger trees: stability and convergence. Monthly Notices of the Royal Astronomical Society, 459(2), https://doi.org/10.1093/mnras/stw726

Merger trees are routinely used to follow the growth and merging history of dark matter haloes and subhaloes in simulations of cosmic structure formation. Srisawat et al. compared a wide range of merger-tree-building codes. Here we test the influence... Read More about Sussing merger trees: stability and convergence.

nIFTy galaxy cluster simulations – IV. Quantifying the influence of baryons on halo properties (2016)
Journal Article
Cui, W., Power, C., Knebe, A., Kay, S. T., Sembolini, F., Elahi, P. J., …Thacker, R. J. (2016). nIFTy galaxy cluster simulations – IV. Quantifying the influence of baryons on halo properties. Monthly Notices of the Royal Astronomical Society, 458(4), https://doi.org/10.1093/mnras/stw603

Building on the initial results of the nIFTy simulated galaxy cluster comparison, we compare and contrast the impact of baryonic physics with a single massive galaxy cluster, run with 11 state-of-the-art codes, spanning adaptive mesh, moving mesh, cl... Read More about nIFTy galaxy cluster simulations – IV. Quantifying the influence of baryons on halo properties.

nIFTY galaxy cluster simulations – III. The similarity and diversity of galaxies and subhaloes (2016)
Journal Article
Elahi, P. J., Knebe, A., Pearce, F. R., Power, C., Yepes, G., Cui, W., …Teyssier, R. (2016). nIFTY galaxy cluster simulations – III. The similarity and diversity of galaxies and subhaloes. Monthly Notices of the Royal Astronomical Society, 458(1), https://doi.org/10.1093/mnras/stw338

We examine subhaloes and galaxies residing in a simulated Λ cold dark matter galaxy cluster (Mcrit200=1.1×1015h−1M⊙) produced by hydrodynamical codes ranging from classic smooth particle hydrodynamics (SPH), newer SPH codes, adaptive and moving mesh... Read More about nIFTY galaxy cluster simulations – III. The similarity and diversity of galaxies and subhaloes.

nIFTy galaxy cluster simulations – I. Dark matter and non-radiative models (2016)
Journal Article
Sembolini, F., Yepes, G., Pearce, F. R., Knebe, A., Kay, S. T., Power, C., …Thacker, R. J. (in press). nIFTy galaxy cluster simulations – I. Dark matter and non-radiative models. Monthly Notices of the Royal Astronomical Society, 457(4), https://doi.org/10.1093/mnras/stw250

We have simulated the formation of a galaxy cluster in a Ʌ cold dark matter universe using 13 different codes modelling only gravity and non-radiative hydrodynamics (RAMSES, ART, AREPO, HYDRA and nine incarnations of GADGET). This range of codes incl... Read More about nIFTy galaxy cluster simulations – I. Dark matter and non-radiative models.

Major mergers going Notts: challenges for modern halo finders (2015)
Journal Article
Behroozi, P., Knebe, A., Pearce, F. R., Elahi, P., Han, J., Lux, H., …Srisawat, C. (2015). Major mergers going Notts: challenges for modern halo finders. Monthly Notices of the Royal Astronomical Society, 454(3), https://doi.org/10.1093/mnras/stv2046

Merging haloes with similar masses (i.e. major mergers) pose significant challenges for halo finders. We compare five halo-finding algorithms’ (ahf, hbt, rockstar, subfind, and velociraptor) recovery of halo properties for both isolated and cosmologi... Read More about Major mergers going Notts: challenges for modern halo finders.

nIFTy cosmology: comparison of galaxy formation models (2015)
Journal Article
Knebe, A., Pearce, F. R., Thomas, P. A., Benson, A., Blaizot, J., Bower, R., …Yi, S. K. (2015). nIFTy cosmology: comparison of galaxy formation models. Monthly Notices of the Royal Astronomical Society, 451(4), https://doi.org/10.1093/mnras/stv1149

We present a comparison of 14 galaxy formation models: 12 different semi-analytical models and 2 halo occupation distribution models for galaxy formation based upon the same cosmological simulation and merger tree information derived from it. The par... Read More about nIFTy cosmology: comparison of galaxy formation models.

Solving the puzzle of subhalo spins (2015)
Journal Article
Wang, Y., Lin, W., Pearce, F. R., Lux, H., Muldrew, S. I., & Onions, J. (2015). Solving the puzzle of subhalo spins. Astrophysical Journal, 801(2), Article 93. https://doi.org/10.1088/0004-637X/801/2/93

Investigating the spin parameter distribution of subhalos in two high-resolution isolated halo simulations, recent work by Onions et al. suggested that typical subhalo spins are consistently lower than the spin distribution found for field halos. To... Read More about Solving the puzzle of subhalo spins.

Sussing merger trees: the impact of halo merger trees on galaxy properties in a semi-analytic model (2014)
Journal Article
Lee, J., Yi, S. K., Elahi, P. J., Thomas, P. A., Pearce, F. R., Behroozi, P., …Tweed, D. (2014). Sussing merger trees: the impact of halo merger trees on galaxy properties in a semi-analytic model. Monthly Notices of the Royal Astronomical Society, 445(4), https://doi.org/10.1093/mnras/stu2039

A halo merger tree forms the essential backbone of a semi-analytic model for galaxy formation and evolution. Recent studies have pointed out that extracting merger trees from numerical simulations of structure formation is non-trivial; different tree... Read More about Sussing merger trees: the impact of halo merger trees on galaxy properties in a semi-analytic model.