2010ApJ...721..653R

Query : 2010ApJ...721..653R

2010ApJ...721..653R - Astrophys. J., 721, 653-669 (2010/September-3)

Impact of Chandra calibration uncertainties on galaxy cluster temperatures: application to the Hubble constant.

REESE E.D., KAWAHARA H., KITAYAMA T., OTA N., SASAKI S. and SUTO Y.

Abstract (from CDS):

We perform a uniform, systematic X-ray spectroscopic analysis of a sample of 38 galaxy clusters with three different Chandra calibrations. The temperatures change systematically between calibrations. Cluster temperatures change on average by roughly ∼6% for the smallest changes and roughly ∼13% for the more extreme changes between calibrations. We explore the effects of the Chandra calibration on cluster spectral properties and the implications on Sunyaev-Zel'dovich effect (SZE) and X-ray determinations of the Hubble constant. The Hubble parameter changes by +10% and -13% between the current calibration and two previous Chandra calibrations, indicating that changes in the cluster temperature basically explain the entire change in H0. Although this work focuses on the difference in spectral properties and resultant Hubble parameters between the calibrations, it is intriguing to note that the newer calibrations favor a lower value of the Hubble constant, H0∼ 60 km/s/Mpc, typical of results from SZE/X-ray distances. Both galaxy clusters themselves and the details of the instruments must be known precisely to enable reliable precision cosmology with clusters, which will be feasible with combined efforts from ongoing observations and planned missions and observatories covering a wide range of wavelengths.

Abstract Copyright: ∼

Journal keyword(s): cosmic background radiation - cosmology: observations - distance scale - X-rays: galaxies: clusters

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 502 0
2 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 186 0
3 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 229 0
4 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 747 0
5 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 352 0
6 ClG J0647+7015 ClG 06 47 50.0 +70 14 55           ~ 153 0
7 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 180 0
8 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 181 0
9 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 258 0
10 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
11 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 253 0
12 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 295 0
13 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1011 1
14 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 282 0
15 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 454 0
16 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 138 0
17 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 460 0
18 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 430 0
19 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 215 0
20 ClG J1311-0311 ClG 13 11 01.7 -03 10 38           ~ 109 0
21 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
22 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 548 0
23 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 361 0
24 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 688 1
25 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 209 0
26 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
27 ACO 1995 ClG 14 52 55.0 +58 02 59           ~ 130 0
28 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 180 0
29 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 562 0
30 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
31 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
32 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 134 0
33 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 117 0
34 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 342 0
35 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 627 1
36 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 165 0
37 ClG J2129-0741 ClG 21 29 26.0 -07 41 28           ~ 172 0
38 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 270 0
39 ACT-CL J2214.9-1359 ClG 22 14 57.3 -14 00 12           ~ 88 0
40 BAX 337.1433+20.6131 ClG 22 28 32.6 +20 37 08           ~ 117 0

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