2015A&A...576A..12A


Query : 2015A&A...576A..12A

2015A&A...576A..12A - Astronomy and Astrophysics, volume 576A, 12-12 (2015/4-1)

Pressure distribution of the high-redshift cluster of galaxies CL J1226.9+3332 with NIKA.

ADAM R.A., COMIS B.C., MACEDAS-PEREZ J.F., ADANE A., ADE P., ANDRE P., BEELEN A., BELIER B., BENOIT A., BIDEAUD A., BILLOT N., BLANQUER G., BOURRION O., CALVO M., CATALANO A., COIFFARD G., CRUCIANI A., D'ADDABBO A., DESERT F.-X., DOYLE S., GOUPY J., KRAMER C., LECLERCQ S., MARTINO J., MAUSKOPF P., MAYET F., MONFARDINI A., PAJOT F., PASCALE E., PEROTTO L., POINTECOUTEAU E., PONTHIEU N., REVERET V., RITACCO A., RODRIGUEZ L., SAVINI G., SCHUSTER K., SIEVERS A., TUCKER C. and ZYLKA R.

Abstract (from CDS):

The thermal Sunyaev-Zel'dovich (tSZ) effect is expected to provide a low scatter mass proxy for galaxy clusters since it is directly proportional to the cluster thermal energy. The tSZ observations have proven to be a powerful tool for detecting and studying them, but high angular resolution observations are now needed to push their investigation to a higher redshift. In this paper, we report high angular (20-arcsec) resolution tSZ observations of the high-redshift cluster CL J1226.9+3332 (z=0.89). It was imaged at 150 and 260GHz using the NIKA camera at the IRAM 30-m telescope. The 150GHz map shows that CL J1226.9+3332 is morphologically relaxed on large scales with evidence of a disturbed core, while the 260GHz channel is used mostly to identify point source contamination. NIKA data are combined with those of Planck and X-ray from Chandra to infer the cluster's radial pressure, density, temperature, and entropy distributions. The total mass profile of the cluster is derived, and we find M500=5.96+1.02–0.79x1014M within the radius R500=930+50–43kpc, at a 68% confidence level. (R500 is the radius within which the average density is 500 times the critical density at the cluster's redshift.) NIKA is the prototype camera of NIKA2, a KIDs (kinetic inductance detectors) based instrument to be installed at the end of 2015. This work is, therefore, part of a pilot study aiming at optimizing tSZ NIKA2 large programs.

Abstract Copyright:

Journal keyword(s): techniques: high angular resolution - galaxies: clusters: individual: CL J1226.9+3332

VizieR on-line data: <Available at CDS (J/A+A/576/A12): list.dat fits/*>

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 826 1
2 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 198 0
3 [HFI2009] J122659.23+333240.5 G 12 26 59.23 +33 32 40.6     24.03   22.21 ~ 3 0
4 [HFI2009] J122659.95+333240.5 G 12 26 59.95 +33 32 40.5     24.24   22.48 ~ 3 0
5 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 776 1

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2021.09.24-10:27:40

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