Galaxy Clusters and Cosmology

Our main research areas are: the study of galaxy clusters (mass estimates, galaxy evolution), proto-clusters, gravitationally lensed sources and deep cosmological surveys in the far-infrared with Herschel, detection and characterization of galaxy clusters with Euclid, cosmology wth galaxy clusters and galaxy clustering.

We are organizing the scientific workshop  "A multi-wavelength view of galaxy clusters: deriving masses in the era of wide-field surveys" on September 6-9, 2021

The First Spanish Meeting on Galaxy Clusters was held at ESAC on 7 & 8 November 2019

The active members of the galaxy clusters and cosmology group in 2021 are :

At ESAC :

• Bruno Altieri (Euclid SOC)
• Xavier Dupac (Euclid SOC)
• Marcos López-Caniego (Planck SOC)
• Lyndsay Old (ESA Research Fellow)
• Ana Maria Perez Garcia (CAB)
• Ricardo Pérez Martinez (XMM-Newton SOC)
• Ivan Valtchanov (XMM-Newton SOC)

At ESTEC:

• René Laureijs (Euclid Project Scientist)
• Rachana Bhatawdekar (ESA Research Fellow)

ESA at STScI:

• Tim Rawle (JWST SOT)

We are involved in several large international collaborations as :

• Euclid Galaxy Clusters science working group
• X-CLASS: The XMM Cluster Archive Super Survey
• GOGREEN  (Gemini Observations of Galaxies in Rich Early ENvironments)
• XXL survey (XMM-Newton eXtremenly Large survey​​​)
• Herschel Lensing survey

from low-redshift to high redshift clusters as well as proto-clusters.

Former members: Irene Pintos-Castro (Univeristy of Toronto), Joana Santos (2013), Miguel Sanchez-Portal (ESO, IRAM, 2017), Luca Conversi (ESRIN,2018), Maggie Lieu (University of  Nottintham, 2019), Ginebra Favole (EPFL, Lausane, 2019), Crispin Logan (ESA Research Fellow,2020)

ESAC trainees: Sophia Milanov (2017), Matej Kosiba (2018), Ditlev Frickmann (2020)

Lastest publications :

• The X-CLASS survey: A catalogue of 1646 X-ray-selected galaxy clusters up to z ∼ 1.5, Koulouridis et al. (2021)
• Understanding X-ray and optical selection of galaxy clusters: a comparison of the XXL and CAMIRA cluster catalogues obtained in the common XXL-HSC SSP area, Willis et al. (2020)
• UV Spectral-Slopes at z=6−9 in the Hubble Frontier Fields: Lack of Evidence for Unusual or Pop III Stellar Populations, Bhatawdekar & Conselice, MNRAS (2020)
• The XXL Survey. XLIV. Sunyaev-Zel'dovich mapping of a low-mass cluster at z ∼ 1: a multi-wavelength approach, Ricci et al. (2020)
• The GOGREEN survey: The environmental dependence of the star-forming galaxy main sequence at 1.0<z<1.5, Old L. et al., MNRAS (2020)
• Multiwavelength classification of X-ray selected galaxy cluster candidates using convolutional neural networks, Kosiba et al., MNRAS (2020)
• The XXL Survey. XXV. Cosmological analysis of the C1 cluster number counts,  Pacaud et al., A&A, 2018
• The XXL Survey. XX. The 365 cluster catalogue, Adami et al., A&A, 2018
• The Spitzer Planck Herschel Infrared Cluster (SPHerIC) survey: candidate galaxy clusters at 1.3 < z < 3 selected by high star-formation rate, Martinache et al., A&A, 2018
• Hierarchical inference of the relationship between concentration and mass in galaxy groups and clusters, Lieu et al, MNRAS, 2017
• A complete census of Herschel-detected infrared sources within the HST Frontier Fields, Rawle et al., MNRAS, 2016
• The XXL survey XV: evidence for dry merger driven BCG growth in XXL-100-GC X-ray clusters, Lavoie et al., MNRAS, 2016
• Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866. II. Morphological properties, Pintos-Castro et al., A&A, 2016
• The XXL Survey. II. The bright cluster sample: catalogue and luminosity function, Pacaud et al., A&A, 2016

Contact point: Bruno Altieri