2013/05/31 by Aseem Paranjape, Emiliano Sefusatti, E. Sefusatti +4 · 40 citations
Earth and Planetary Sciences · Environmental Science · Mathematics · Physics and Astronomy · #Astrophysics #Climate variability and models #Computer science #Consistency (knowledge bases) #Formalism (music) #Fourier transform #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Halo #Halo effect #Mathematics #Physics #Precipitation Measurement and Analysis #Quantum mechanics #Scale (ratio) #Space (punctuation) #Statistical physics #astro-ph.CO
paper · pdf · doi:10.1093/mnras/stt1578
published in Monthly Notices of the Royal Astronomical Society 436(1), 449-459 (Oxford University Press) · 13 pages, 9 figures; v3 -- Matches published version
openalex publication_date 2013/09/18 · arxiv created 2013/10/09 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore the scale dependence of halo bias using real-space cross-correlation measurements in N-body simulations and in pinocchio, an algorithm based on Lagrangian Perturbation Theory. Recent work has shown how to interpret such real-space measurements in terms of k-dependent bias in Fourier space, and how to remove the k-dependence to reconstruct the k-independent peak-background split halo bias parameters. We compare our reconstruction of the linear bias, which requires no free parameters, with previous estimates from N-body simulations which were obtained directly in Fourier space at large scales, and find very good agreement. Our reconstruction of the quadratic bias is similarly parameter-free, although in this case there are no previous Fourier space measurements to compare with. Our analysis of N-body simulations explicitly tests the predictions of the excursion set peaks (ESP) formalism of Paranjape et al. for the scale dependence of bias; we find that the ESP predictions accurately describe our measurements. In addition, our measurements in pinocchio serve as a useful, successful consistency check between pinocchio and N-body simulations that is not accessible to traditional measurements.