2010A&A...519A..29B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:58:12

2010A&A...519A..29B - Astronomy and Astrophysics, volume 519, A29-29 (2010/9-1)

Non-parametric modeling of the intra-cluster gas using APEX-SZ bolometer imaging data.

BASU K., ZHANG Y.-Y., SOMMER M.W., BENDER A.N., BERTOLDI F., DOBBS M., ECKMILLER H., HALVERSON N.W., HOLZAPFEL W.L., HORELLOU C., JARITZ V., JOHANSSON D., JOHNSON B., KENNEDY J., KNEISSL R., LANTING T., LEE A.T., MEHL J., MENTEN K.M., NAVARRETE F.P., PACAUD F., REICHARDT C.L., REIPRICH T.H., RICHARDS P.L., SCHWAN D. and WESTBROOK B.

Abstract (from CDS):

We aim to demonstrate the usability of mm-wavelength imaging data obtained from the APEX-SZ bolometer array to derive the radial temperature profile of the hot intra-cluster gas out to radius r500 and beyond. The goal is to study the physical properties of the intra-cluster gas by using a non-parametric de-projection method that is, aside from the assumption of spherical symmetry, free from modeling bias. We use publicly available X-ray spectroscopic-imaging data in the 0.7-2keV energy band from the XMM-Newton observatory and our Sunyaev-Zel'dovich Effect (SZE) imaging data from the APEX-SZ experiment at 150GHz to de-project the density and temperature profiles for a well-studied relaxed cluster, Abell 2204. We derive the gas density, temperature and entropy profiles assuming spherical symmetry, and obtain the total mass profile under the assumption of hydrostatic equilibrium. For comparison with X-ray spectroscopic temperature models, a re-analysis of recent Chandra observation is done with the latest calibration updates. We compare the results with that from an unrelaxed cluster, Abell 2163, to illustrate some differences between relaxed and merging systems. Using the non-parametric modeling, we demonstrate a decrease of gas temperature in the cluster outskirts, and also measure gas entropy profiles, both of which are done for the first time independently of X-ray spectroscopy using the SZE and X-ray imaging data. The gas entropy measurement in the central 100kpc shows the usability of APEX-SZ data for inferring cluster dynamical states with this method. The contribution of the SZE systematic uncertainties in measuring Te at large radii is shown to be small compared to XMM-Newton and Chandra systematic spectroscopic errors. The total mass profile obtained using the hydrostatic equilibrium assumption is in agreement with the published X-ray and weak lensing results; the upper limit on M200 derived from the non-parametric method is consistent with the NFW model prediction from weak lensing analysis.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Abell 2204 - cosmology: observations - cosmic microwave background - intergalactic medium - X-rays: galaxies: clusters

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 475 0
2 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1828 1
3 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 470 0
4 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 810 1
5 2MASX J07473129-1917403 BiC 07 47 31.296 -19 17 40.34   19.60       ~ 393 1
6 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 364 0
7 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 270 2
8 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 477 0
9 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1167 0
10 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 521 0
11 [KVK2008] SMM J163244.7+053452 smm 16 32 44.7 +05 34 52           ~ 1 0
12 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 400 0
13 1RXS J222834.4+203647 ClG 22 28 37.1 +20 36 31           ~ 103 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:58:12

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