The XXL Survey: XLIV. Sunyaev-Zel'dovich mapping of a low-mass cluster at z ∼1: A multi-wavelength approach
Artikel i vetenskaplig tidskrift, 2020

High-mass clusters at low redshifts have been intensively studied at various wavelengths. However, while more distant objects at lower masses constitute the bulk population of future surveys, their physical state remain poorly explored to date. In this paper, we present resolved observations of the Sunyaev-Zel'dovich (SZ) effect, obtained with the NIKA2 camera, towards the cluster of galaxies XLSSC 102, a relatively low-mass system (M500 ∼ 2 × 1014 M·) at z = 0.97 detected from the XXL survey. We combine NIKA2 SZ data, XMM-Newton X-ray data, and Megacam optical data to explore, respectively, the spatial distribution of the gas electron pressure, the gas density, and the galaxies themselves. We find significant offsets between the X-ray peak, the SZ peak, the brightest cluster galaxy, and the peak of galaxy density. Additionally, the galaxy distribution and the gas present elongated morphologies. This is interpreted as the sign of a recent major merging event, which induced a local boost of the gas pressure towards the north of XLSSC 102 and stripped the gas out of the galaxy group. The NIKA2 data are also combined with XXL data to construct the thermodynamic profiles of XLSSC 102, obtaining relatively tight constraints up to about ∼r500, and revealing properties that are typical of disturbed systems. We also explore the impact of the cluster centre definition and the implication of local pressure substructure on the recovered profiles. Finally, we derive the global properties of XLSSC 102 and compare them to those of high-mass-and-low-redshift systems, finding no strong evidence for non-standard evolution. We also use scaling relations to obtain alternative mass estimates from our profiles. The variation between these different mass estimates reflects the difficulty to accurately measure the mass of low-mass clusters at z ∼ 1, especially with low signal-to-noise ratio data and for a disturbed system. However, it also highlights the strength of resolved SZ observations alone and in combination with survey-like X-ray data. This is promising for the study of high redshift clusters from the combination of eROSITA and high resolution SZ instruments and will complement the new generation of optical surveys from facilities such as LSST and Euclid.

Galaxies: clusters: individual: XLSSC 102

Techniques: high angular resolution

X-rays: galaxies: clusters

Galaxies: clusters: intracluster medium

Författare

M. Ricci

Universite Savoie Mont Blanc

Observatoire de la Cote d'Azur

R. M. Adam

Centro de Estudios de Física del Cosmos de Aragón

École polytechnique

D. Eckert

Universite de Geneve

P., Ade

Cardiff University

P. André

Université Paris-Saclay

A. Andrianasolo

Université Grenoble Alpes

B. Altiéri

European Space Astronomy Centre (ESAC)

H. Aussel

Université Paris-Saclay

A. Beelen

Institut d'Astrophysique Spatiale

C. Benoist

Observatoire de la Cote d'Azur

A. Benoît

Université Grenoble Alpes

S. Berta

Institut de Radioastronomie Millimétrique (IRAM)

A. Bideaud

Université Grenoble Alpes

M. Birkinshaw

University of Bristol

O. Bourrion

Université Grenoble Alpes

D. Boutigny

Universite Savoie Mont Blanc

M. Bremer

University of Bristol

M. Calvo

Université Grenoble Alpes

A. Cappi

Observatoire de la Cote d'Azur

Istituto nazionale di astrofisica (INAF)

L. Chiappetti

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

A. Catalano

Université Grenoble Alpes

M. De Petris

Sapienza, Università di Roma

F. X. Désert

Université Grenoble Alpes

S. Doyle

Cardiff University

E. F.C. Driessen

Institut de Radioastronomie Millimétrique (IRAM)

L. Faccioli

Université Paris-Saclay

C. Ferrari

Observatoire de la Cote d'Azur

S. Fotopoulou

Durham University

F. Gastaldello

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

P. Giles

University of Bristol

A. Gomez

Centro de Astrobiologia (CAB)

J. Goupy

Université Grenoble Alpes

O. Hahn

Observatoire de la Cote d'Azur

Cathy Horellou

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Extragalaktisk astrofysik

F. Kéruzoré

Université Grenoble Alpes

E. Koulouridis

Université Paris-Saclay

National Observatory of Athens

C. Kramer

Institut de Radioastronomie Millimétrique (IRAM)

B. Ladjelate

Institut de Radioastronomie Millimétrique (IRAM)

Guilaine Lagache

Laboratoire d'Astrophysique de Marseille

S. Leclercq

Institut de Radioastronomie Millimétrique (IRAM)

J.F. Lestrade

Observatoire de Paris

J. F. Maciás-Pérez

Université Grenoble Alpes

B. Maughan

University of Bristol

S. Maurogordato

Observatoire de la Cote d'Azur

P. D. Mauskopf

Arizona State University

Cardiff University

A. Monfardini

Université Grenoble Alpes

F. Pacaud

Universität Bonn

L. Perotto

Université Grenoble Alpes

M. Pierre

Université Paris-Saclay

G. Pisano

Cardiff University

E. Pompei

European Southern Observatory Santiago

N. Ponthieu

Université Grenoble Alpes

V. Revéret

Université Paris-Saclay

A. Ritacco

Ecole Normale Superieure (ENS)

Institut d'Astrophysique Spatiale

C. Romero

Institut de Radioastronomie Millimétrique (IRAM)

H. Roussel

Université Pierre et Marie Curie (UPMC)

F. Ruppin

Université Grenoble Alpes

M. Sánchez Portal

Institut de Radioastronomie Millimétrique (IRAM)

K. Schuster

Institut de Radioastronomie Millimétrique (IRAM)

M. Sereno

Istituto nazionale di astrofisica (INAF)

Istituto Nazionale di Fisica Nucleare

S. Shu

Institut de Radioastronomie Millimétrique (IRAM)

A. Sievers

Institut de Radioastronomie Millimétrique (IRAM)

C. Tucker

Cardiff University

K. Umetsu

Academia Sinica

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 642 A126

Ämneskategorier

Astronomi, astrofysik och kosmologi

Atom- och molekylfysik och optik

Geofysik

DOI

10.1051/0004-6361/201937249

Mer information

Senast uppdaterat

2020-11-10