NIKA2: a millimeter camera for cluster cosmology

J.F. Macias-Perez (1) , R. Adam (1, 2) , P. Ade (3) , P. André (4) , M. Arnaud (4) , H. Aussel (4) , I. Bartalucci (4) , A. Beelen (5) , A. Benoit (6) , A. Bideaud (6) , O. Bourrion (1) , M. Calvo (7) , A. Catalano (1) , B. Comis (1) , M. de Petris , F.-X. Désert (8) , S. Doyle (3) , E. F. C. Driessen (9) , J. Goupy (6) , C. Kramer (10) , Guilaine Lagache (11) , S. Leclercq (9) , J.F. Lestrade (12) , P. Mauskopf (3, 13) , F. Mayet (1) , A. Monfardini (6) , L. Perotto (1) , E. Pointecouteau (14) , G. Pisano (3) , N. Ponthieu (8) , G.W. Pratt (4) , V. Reveret (4) , A. Ritacco (10) , C. Romero (9) , H. Roussel (15) , F. Ruppin (1) , K. Schuster (9) , A. Sievers (10) , C. Tucker (3) , R. Zylka (9)

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 LAGRANGE - Joseph Louis LAGRANGE
3 Cardiff University
4 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
5 IAS - Institut d'astrophysique spatiale
6 NEEL - HELFA - Hélium : du fondamental aux applications
7 NEEL - Cryo - Cryogénie
8 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
9 IRAM - Institut de RadioAstronomie Millimétrique
10 IRAM - Instituto de RadioAstronomía Milimétrica
11 LAM - Laboratoire d'Astrophysique de Marseille
12 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
13 ASU - Arizona State University [Tempe]
14 IRAP - Institut de recherche en astrophysique et planétologie
15 IAP - Institut d'Astrophysique de Paris

Galaxy clusters constitute a major cosmological probe. However, Planck 2015 results have shown a weak tension between CMB-derived and cluster-derived cosmological parameters. This tension might be due to poor knowledge of the cluster mass and observable relationship. As for now, arcmin resolution Sunyaev-Zeldovich (SZ) observations (e.g. SPT, ACT and Planck) only allowed detailed studies of the intra cluster medium for low redshift clusters (z < 0:2). For high redshift clusters ( z > 0:5) high resolution and high sensitivity SZ observations are needed. With both a wide field of view (6.5 arcmin) and a high angular resolution (17.7 and 11.2 arcsec at 150 and 260 GHz), the NIKA2 camera installed at the IRAM 30-m telescope (Pico Veleta, Spain) is particularly well adapted for these observations. The NIKA2 SZ observation program will map a large sample of clusters (50) at redshifts between 0.5 and 0.9. As a pilot study for NIKA2, several clusters of galaxies have been observed with the pathfinder, NIKA, at the IRAM 30-m telescope to cover the various configurations and observation conditions expected for NIKA2.

Domaines: Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]

J.F. Macias-Perez, R. Adam, P. Ade, P. André, M. Arnaud, et al.. NIKA2: a millimeter camera for cluster cosmology. European Physical Society Conference on High Energy Physics (EPS-HEP2017), Jul 2017, Venice, Italy. pp.042. ⟨in2p3-01559502⟩