2017A&A...606A..64A

Query : 2017A&A...606A..64A

2017A&A...606A..64A - Astronomy and Astrophysics, volume 606A, 64-64 (2017/10-1)

Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel'dovich imaging.

ADAM R., ARNAUD M., BARTALUCCI I., ADE P., ANDRE P., BEELEN A., BENOIT A., BIDEAUD A., BILLOT N., BOURDIN H., BOURRION O., CALVO M., CATALANO A., COIFFARD G., COMIS B., D'ADDABBO A., DESERT F.-X., DOYLE S., FERRARI C., GOUPY J., KRAMER C., LAGACHE G., LECLERCQ S., MACIAS-PEREZ J.-F., MAUROGORDATO S., MAUSKOPF P., MAYET F., MONFARDINI A., PAJOT F., PASCALE E., PEROTTO L., PISANO G., POINTECOUTEAU E., PONTHIEU N., PRATT G.W., REVERET V., RITACCO A., RODRIGUEZ L., ROMERO C., RUPPIN F., SCHUSTER K., SIEVERS A., TRIQUENEAUX S., TUCKER C. and ZYLKA R.

Abstract (from CDS):

We propose a method to map the temperature distribution of the hot gas in galaxy clusters that uses resolved images of the thermal Sunyaev-Zel'dovich (tSZ) effect in combination with X-ray data. Application to images from the New IRAM KIDs Array (NIKA) and XMM-Newton allows us to measure and determine the spatial distribution of the gas temperature in the merging cluster MACS J0717.5+3745, at z = 0.55. Despite the complexity of the target object, we find a good morphological agreement between the temperature maps derived from X-ray spectroscopy only - using XMM-Newton (T_XMM) and Chandra (T_CXO) - and the new gas-mass-weighted tSZ+X-ray imaging method (T_SZX). We correlate the temperatures from tSZ+X-ray imaging and those from X-ray spectroscopy alone and find that T_SZX is higher than T_XMM and lower than T_CXO by∼10% in both cases. Our results are limited by uncertainties in the geometry of the cluster gas, contamination from kinetic SZ (∼10%), and the absolute calibration of the tSZ map (7%). Investigation using a larger sample of clusters would help minimise these effects.

Abstract Copyright: © ESO, 2017

Journal keyword(s): techniques: high angular resolution - galaxies: clusters: individual: MACS J0717.5+3745 - X-rays: galaxies: clusters - galaxies: clusters: intracluster medium - galaxies: clusters: intracluster medium

Simbad objects: 2

Full paper

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Number of rows : 2

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	ClG J0717+3745	ClG	07 17 36.50	+37 45 23.0						~	457	0
2	ACO 2142	ClG	15 58 14.38	+27 12 57.8						~	747	0

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