ASOHF: a new adaptive spherical overdensity halo finder

Abstract

We present and test a new halo finder based on the spherical overdensity (SO) method. This new adaptive spherical overdensity halo finder (ASOHF) is able to identify dark matter haloes and their substructures (subhaloes) down to the scales allowed by the analysed simulations. The code has been especially designed for the adaptive mesh refinement cosmological codes, although it can be used as a stand-alone halo finder for N-body codes. It has been optimised for the purpose of building the merger tree of the haloes. In order to verify the viability of this new tool, we have developed a set of bed tests that allows us to estimate the performance of the finder. Finally, we apply the halo finder to a cosmological simulation and compare the results obtained to those given by other well known publicly available halo finders.

Latex format, 16 pages, 11 postscript figures, accepted for publication in Astronomy and Astrophysics

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• Large-scale dark matter simulations
• ORIGAMI: Delineating Halos using Phase-Space Folds
• The Accuracy of Subhalo Detection
• Galaxy formation in semi-analytic models and cosmological hydrodynamic zoom simulations
• A look to the inside of haloes: a characterisation of the halo shape as a function of overdensity in the Planck cosmology
• Fully cosmological virtual massive galaxies at z=0: kinematical, morphological, and stellar population characterisation
• On the accretion history of galaxy clusters: temporal and spatial distribution
• Cosmological shock waves: clues to the formation history of haloes
• Is ram-pressure stripping an efficient mechanism to remove gas in galaxies?
• Troubled cosmic flows: turbulence, enstrophy and helicity from the assembly history of the intracluster medium
• Multi-wavelength mock observations of the WHIM in a simulated galaxy cluster
• On the choice of the most suitable indicator for the assembly state of dark matter haloes through cosmic time
• $\text{PineTree}$: A generative, fast, and differentiable halo model for wide-field galaxy surveys
• Cosmic accretion shocks as a tool to measure the dark matter mass of galaxy clusters
• The eventful life journey of galaxy clusters. I. Impact of DM halo and ICM properties on their full assembly histories
• Dark matter haloes: a multistream view
• The imprints of galaxy cluster internal dynamics on the Sunyaev-Zeldovich effect
• Scalable Streaming Tools for Analyzing $N$-body Simulations: Finding Halos and Investigating Excursion Sets in One Pass
• HIKER: a halo-finding method based on kernel-shift algorithm
• Identifying Halos in Cosmological Simulations with Continuous Wavelet Analysis: The 2D Case
• A Conditional Abundance Matching Method of Extending Simulated Halo Merger Trees to Resolve Low-Mass Progenitors and Sub-halos
• CWTHF: Identifying Dark Matter Halos with Continuous Wavelet Transform
• The eventful life journey of galaxy clusters. II. Impact of mass accretion on the thermodynamical structure of the ICM
• The halo finding problem revisited: a deep revision of the ASOHF code
• The signature of major mergers on the hydrostatic mass bias of galaxy clusters