AMICO: optimised detection of galaxy clusters in photometric surveys

Abstract

We present AMICO (Adaptive Matched Identifier of Clustered Objects), a new algorithm for the detection of galaxy clusters in photometric surveys. AMICO is based on the Optimal Filtering technique, which allows to maximise the signal-to-noise ratio of the clusters. In this work we focus on the new iterative approach to the extraction of cluster candidates from the map produced by the filter. In particular, we provide a definition of membership probability for the galaxies close to any cluster candidate, which allows us to remove its imprint from the map, allowing the detection of smaller structures. As demonstrated in our tests, this method allows the deblending of close-by and aligned structures in more than $50\%$ of the cases for objects at radial distance equal to $0.5\times R_{200}$ or redshift distance equal to $2\times {\sigma }_z$, being ${\sigma }_z$ the typical uncertainty of photometric redshifts. Running AMICO on mocks derived from N-body simulations and semi-analytical modelling of the galaxy evolution, we obtain a consistent mass-amplitude relation through the redshift range $0.3<z<1$, with a logarithmic slope $\sim 0.55$ and a logarithmic scatter $\sim 0.14$. The fraction of false detections is steeply decreasing with S/N, and negligible at S/N > 5.

18 pages, accepted for publication in MNRAS

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Cited by in corpus (61)

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• Euclid preparation. XXXII. Evaluating the weak lensing cluster mass biases using the Three Hundred Project hydrodynamical simulations
• Euclid preparation III. Galaxy cluster detection in the wide photometric survey, performance and algorithm selection
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• DETECTIFz galaxy groups in the REFINE survey -- 1. Group detection and quenched fraction evolution at $z<2.5$
• GalWeight Application: A publicly-available catalog of dynamical parameters of 1,800 galaxy clusters from SDSS-DR13, ($GalWCat19$)
• The XXL Survey XXVIII. Galaxy luminosity functions of the XXL-N clusters
• AMICO galaxy clusters in KiDS-DR3: Measurement of the halo bias and power spectrum normalization from a stacked weak lensing analysis
• S-PLUS DR1 galaxy clusters and groups catalogue using PzWav
• Mass Bias of Weak Lensing Shear-selected Galaxy Cluster Samples
• AMICO galaxy clusters in KiDS-DR3: galaxy population properties and their redshift dependence
• Velocity Dispersions of Clusters in the Dark Energy Survey Y3 redMaPPer Catalog
• Understanding matched filters for precision cosmology
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• The miniJPAS survey: clusters and galaxy groups detection with AMICO
• AMICO galaxy clusters in KiDS-DR3: Evolution of the luminosity function between z=0.1 and z=0.8
• Nature versus nurture: relic nature and environment of the most massive passive galaxies at $z<0.5$
• AMICO galaxy clusters in KiDS-DR3: Cosmological constraints from angular power spectrum and correlation function
• The miniJPAS survey: The galaxy populations in the most massive cluster in miniJPAS, mJPC2470-1771
• The COSMOS-Web deep galaxy group catalog up to $z=3.7$
• Reliable Photometric Membership (RPM) of Galaxies in Clusters. I. A Machine Learning Method and its Performance in the Local Universe
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• Star forming and gas rich brightest cluster galaxies at $z\sim 0.4$ in the Kilo-Degree Survey
• CoMaLit -- VI. Intrinsic scatter in stacked relations. The weak lensing AMICO galaxy clusters in KiDS-DR3
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• On the weak lensing masses of a new sample of galaxy groups
• Exploring the mass and redshift dependence of the cluster pressure profile with stacks on thermal SZ maps
• Star forming brightest cluster galaxies at $z\sim 0.4$ in KiDS. Further studies of cold gas and stellar properties
• COSMOS-Web galaxy groups: Evolution of red sequence and quiescent galaxy fraction
• Euclid preparation: Determining the weak lensing mass accuracy and precision for galaxy clusters
• COSMOS Web: Morphological quenching and size-mass evolution of brightest group galaxies from z = 3.7
• AMICO galaxy clusters in KiDS-1000: cosmological constraints and mass calibration from counts and weak lensing
• AMICO galaxy clusters in KiDS-DR3: constraints on $\Lambda$CDM from extreme value statistics
• YOLO-CL cluster detection in the Rubin/LSST DC2 simulation
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• CHEX-MATE: The Impact of Triaxiality and Orientation on Planck SZ Cluster Selection and Weak Lensing Mass Measurements
• Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections
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• Star formation quenching precedes morphological transformation in COSMOS-WEB's richest galaxy groups
• Selecting Clusters and Protoclusters via Stellar Mass Density: II. Application to HSC-SSP Observations
• Quantifying the impact of detection bias from blended galaxies on cosmic shear surveys
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• Catalogs of optically-selected clusters and photometric luminous red galaxies from the Hyper Suprime-Cam Subaru Strategic Program final year dataset
• AMICO galaxy clusters in KiDS-DR3: the impact of estimator statistics on the luminosity-mass scaling relation
• AMICO galaxy clusters in KiDS-1000: Splashback radius from weak lensing and cluster-galaxy correlation function
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