ELG$\times$LRG distribution through dark matter halo dynamics

Abstract

We investigate the clustering and halo occupation distribution (HOD) of DESI Y1 emission-line (ELGs) and luminous red (LRGs) galaxies at $0.8<z<1.1$, including their cross-correlation (ELG$\times$LRG), using the AbacusSummit suite and a new Halo Occupation Model (HOMe) for galaxy multi-tracers. This integrates intra-halo dynamics, halo exclusion, and quenching, bridging insights from hydrodynamical, HOD, abundance-matching, and semi-analytic studies. Leveraging full phase-space information from the Uchuu N-body simulation, and sampling satellites from dark-matter particle positions via physically motivated prescriptions, HOMe reproduces the anisotropic clustering down to $s=200h^{-1}$kpc with unprecedented accuracy. Model parameters are inferred solely from two-point statistics using a two-level Bayesian framework, yielding high-fidelity ELG, LRG and cross-reference catalogs. We find that satellite ELGs behave as incoherent flows within their parent halos, dominating the clustering below $4h^{-1}$Mpc. The HOD from the best-fit HOMe has the following properties: (i) 90.50% (85.91%) of ELGs (LRGs) are central galaxies without satellites, residing in halos of $M_{\mathrm{vir}}\sim 6.6\times 10^{11}(1.2\times 10^{13})h^{-1}{\mathrm{M}}_{\odot }$; (ii) the ELG$\times$LRG cross-correlation is governed by central-central pairs and shaped by halo exclusion on $2-5h^{-1}$Mpc scales; (iii) 9.50% (14.09%) of ELGs (LRGs) are satellites, of which 1.09% (3.52%) inhabit halos with a central galaxy of the same species in a maximally conformal configuration, 7.02% (0.005%) orbit complementary hosts in a minimally conformal state, and 0.58% (10.57%) are orphans. The high sensitivity of HOMe precisely captures the dynamics of satellites in different host environments, opening a promising avenue for understanding systematics, the dynamical nature of dark matter, potentially distinguishing gravity models.

37 pages, 24 figures, 5 tables

References in corpus (86)

• emcee: The MCMC Hammer
• A Universal Density Profile from Hierarchical Clustering
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• A Comprehensive Analysis of Uncertainties Affecting the Stellar Mass - Halo Mass Relation for 0<z<4
• Halos and galaxies in the standard cosmological model: results from the Bolshoi simulation
• The Dark Side of the Halo Occupation Distribution
• The Halo Occupation Distribution: Towards an Empirical Determination of the Relation Between Galaxies and Mass
• Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• The Luminosity and Color Dependence of the Galaxy Correlation Function
• Modeling Luminosity-Dependent Galaxy Clustering Through Cosmic Time
• Galaxy evolution in groups and clusters: satellite star formation histories and quenching timescales in a hierarchical Universe
• Galaxy Evolution from Halo Occupation Distribution Modeling of DEEP2 and SDSS Galaxy Clustering
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• The redshift dependence of the structure of massive LCDM halos
• Galaxy evolution in groups and clusters: star formation rates, red sequence fractions, and the persistent bimodality
• Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument
• Haloes gone MAD: The Halo-Finder Comparison Project
• The Connection between Galaxies and Dark Matter Structures in the Local Universe
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the BOSS Final Data Release
• Galaxies in LCDM with Halo Abundance Matching: luminosity-velocity relation, baryonic mass-velocity relation, velocity function and clustering
• Satellite Kinematics III: Halo Masses of Central Galaxies in SDSS
• The Uchuu Simulations: Data Release 1 and Dark Matter Halo Concentrations
• The Radial Distribution of Galaxies in LCDM clusters
• DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars
• LoCuSS: The slow quenching of star formation in cluster galaxies and the need for pre-processing
• Target Selection and Validation of DESI Luminous Red Galaxies
• Cosmological Constraints from a Combination of Galaxy Clustering and Lensing -- I. Theoretical Framework
• AbacusSummit: A Massive Set of High-Accuracy, High-Resolution $N$-Body Simulations
• Halo Occupation Distribution Modeling of Clustering of Luminous Red Galaxies
• Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Modeling the clustering and halo occupation distribution of BOSS-CMASS galaxies in the Final Data Release
• Galaxy evolution in the metric of the Cosmic Web
• COSMOS2020: The Galaxy Stellar Mass Function: the assembly and star formation cessation of galaxies at $0.2<z\le 7.5$
• Mapping stellar content to dark matter halos using galaxy clustering and galaxy-galaxy lensing in the SDSS DR7
• Halo Stochasticity from Exclusion and non-linear Clustering
• Target Selection and Validation of DESI Emission Line Galaxies
• What aspects of galaxy environment matter?
• Quenched fractions in the IllustrisTNG simulations: the roles of AGN feedback, environment, and pre-processing
• Subhalo abundance matching and assembly bias in the EAGLE simulation
• The overdensity and masses of the friends-of-friends halos and universality of the halo mass function
• Simulations of ram-pressure stripping in galaxy-cluster interactions
• Cosmological Constraints from Galaxy Clustering and the Mass-to-Number Ratio of Galaxy Clusters
• Mapping stellar content to dark matter halos. II. Halo mass is the main driver of galaxy quenching
• The $\text{Abacus}$ Cosmological $N$-body Code
• Detecting Effects of Filaments on Galaxy Properties in the Sloan Digital Sky Survey III
• The influence of the environmental history on quenching star formation in a $\Lambda$CDM universe
• The impact of assembly bias on the halo occupation in hydrodynamical simulations
• Modelling galaxy clustering: halo occupation distribution versus subhalo matching
• Overconsumption, outflows and the quenching of satellite galaxies
• AbacusHOD: A highly efficient extended multi-tracer HOD framework and its application to BOSS and eBOSS data
• Constraining the LRG Halo Occupation Distribution using Counts-in-Cylinders
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: exploring the Halo Occupation Distribution model for Emission Line Galaxies
• \textsc{CompaSO}: A new halo finder for competitive assignment to spherical overdensities
• DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics
• The host dark matter halos of [OII] emitters at 0.5< z< 1.5
• Multi-tracer extension of the halo model: probing quenching and conformity in eBOSS
• Luminous Red Galaxies in Clusters: Central Occupation, Spatial Distributions, and Mis-centering
• The halo model for cosmology: a pedagogical review
• Clustering properties of $g$-selected galaxies at $z\sim 0.8$
• Correlating galaxy colour and halo concentration: A tunable Halo Model of galactic conformity
• A flexible modelling of galaxy assembly bias
• The fundamental signature of star formation quenching from AGN feedback: A critical dependence of quiescence on supermassive black hole mass not accretion rate
• The galaxy-halo connection of emission-line galaxies in IllustrisTNG
• Extensions to models of the galaxy-halo connection
• Mapping stellar content to dark matter halos - III.Environmental dependence and conformity of galaxy colours
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body Mock Challenge for the eBOSS Emission Line Galaxy Sample
• The impact of galaxy formation on satellite kinematics and redshift-space distortions
• Observations of dark and luminous matter: the radial distribution of satellite galaxies around massive red galaxies
• Star Formation and Quenching of Central Galaxies from Stacked HI Measurements
• nIFTy Cosmology: the clustering consistency of galaxy formation models
• Using Multipoles of the Correlation Function to Measure H(z), D_A(z), and β(z) from Sloan Digital Sky Survey Luminous Red Galaxies
• Galaxy clustering dependence on the $\left[\mathrm{O}\mathrm{II}\right]$ emission line luminosity in the local Universe
• SHAM through the lens of a hydrodynamical simulation
• Consistent and simultaneous modelling of galaxy clustering and galaxy-galaxy lensing with Subhalo Abundance Matching
• Does jackknife scale really matter for accurate large-scale structure covariances?
• Building a Better Understanding of the High Redshift BOSS Galaxies as Tools for Cosmology
• When the Well Runs Dry: Modeling Environmental Quenching of High-mass Satellites in Massive Clusters at \boldmath$z\gtrsim 1$
• K-CLASH: Strangulation and Ram Pressure Stripping in Galaxy Cluster Members at 0.3 < z < 0.6
• SHAMe-SF: Predicting the clustering of star-forming galaxies with an enhanced abundance matching model
• Fast Correlation Function Calculator -- A high-performance pair counting toolkit
• The DESI One-Percent Survey: Modelling the clustering and halo occupation of all four DESI tracers with Uchuu
• Metal line emission around z<1 galaxies
• Scatter in the star formation rate-halo mass relation: secondary bias and its impact on line-intensity mapping