2006A&A...449...41H


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST16:02:44

2006A&A...449...41H - Astronomy and Astrophysics, volume 449, 41-48 (2006/4-1)

Spectral indications of thermal Sunyaev-Zel'dovich effect in ARCHEOPS and WMAP data.

HERNANDEZ-MONTEAGUDO C., MACIAS-PEREZ J.F., TRISTRAM M. and DESERT F.-X.

Abstract (from CDS):

In this paper, we present a joint cross-correlation analysis of the Archeops CMB maps at 143 and 217GHz and the WMAP CMB maps at 41, 61 and 94GHz with sky templates of projected galaxy density constructed from the 2MASS Extended Source catalog. These templates have been divided in patches sorted in decreasing galaxy density with a fixed number of pixels (we considered patches having 32, 64 and 128 pixels) and the cross correlation has been performed independently for each of these patches. We find that the densest patch shows a strong temperature decrement in the Q, V, W bands of WMAP and in the 143GHz channel of Archeops, but not in the 217GHz channel. Furthermore, we find that the spectral behavior of the amplitude of this decrement is compatible with that expected for the non-relativistic thermal Sunyaev-Zel'dovich effect, and is incompatible (at 4.5σ level) with the null hypothesis of having only CMB, noise and a dust component (∝ν2) in those pixels. We find that the first 32-pixel sized patch samples the cores of 11 known massive nearby galaxy clusters. Under the assumption that the decrement found in this patch is due entirely to the thermal Sunyaev-Zel'dovich effect, we obtain an average comptonization parameter for those sources of y=(0.39±0.07)x10–4 at 13arcmin angular scales. This value is compatible at 1-σ with the expectation, y=0.49x10–4, from a model of the cluster flux number counts based on the standard Λ-CDM cosmology (Xue & Wu, 2001ApJ...552..452X). The observed value of y is slightly diluted when computed for the first patch of 64 and 128 pixels, presumably due to the inclusion of less massive clusters, and the dilution factor inferred is also compatible with the quoted model.

Abstract Copyright:

Journal keyword(s): cosmology: cosmic microwave background - Galaxy: globular clusters: general

Simbad objects: 27

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Number of rows : 27

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 ACO 77 ClG 00 40 34.2 +29 31 27           ~ 72 0
2 ACO 104 ClG 00 49 49.8 +24 27 01           ~ 46 0
3 ACO 272 ClG 01 55 19.1 +33 56 41           ~ 54 0
4 ACO 376 ClG 02 45 48 +36 51.6           B8.5 146 1
5 ACO 407 ClG 03 01 43.7 +35 49 48           ~ 104 0
6 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 284 1
7 ACO 671 ClG 08 28 31.97 +30 24 19.7           ~ 150 0
8 ACO 952 ClG 10 13 43.2 +19 46 31           ~ 16 0
9 ACO 1035 ClG 10 32 07.51 +40 15 49.2           ~ 82 0
10 ACO 1185 ClG 11 10 31.4 +28 43 39           ~ 245 1
11 ACO 1235 ClG 11 23 18.4 +19 34 41           ~ 46 0
12 ACO 1377 ClG 11 47 15.66 +55 43 01.6           ~ 137 1
13 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4228 2
14 ACO 1767 ClG 13 36 08.33 +59 12 23.0           ~ 156 0
15 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1157 0
16 ACO 1800 ClG 13 49 41.4 +28 04 08           ~ 99 0
17 ACO 2034 ClG 15 10 10.80 +33 30 21.6           ~ 177 1
18 ACO 2061 ClG 15 21 20.58 +30 40 15.3           ~ 163 1
19 ACO 2065 ClG 15 22 42.6 +27 43 21           ~ 344 0
20 ACO 2069 ClG 15 23 57.9 +29 53 26           ~ 122 0
21 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 674 0
22 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 556 3
23 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1102 1
24 ACO 2244 ClG 17 02 34.01 +34 04 41.1           ~ 247 0
25 ACO 2245 ClG 17 02 40.58 +33 31 13.2           ~ 57 0
26 ACO 2249 ClG 17 09 48.50 +34 28 26.4           ~ 96 0
27 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 504 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-16:02:44

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