2010MNRAS.403.1531G


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.20CET03:19:52

2010MNRAS.403.1531G - Mon. Not. R. Astron. Soc., 403, 1531-1540 (2010/April-2)

A study of the galaxy redshift distribution towards the cosmic microwave background cold spot in the Corona Borealis supercluster.

GENOVA-SANTOS R., PADILLA-TORRES C.P., RUBINO-MARTIN J.A., GUTIERREZ C.M. and REBOLO R.

Abstract (from CDS):

We present a study of the spatial and redshift distributions of Sloan Digital Sky Survey (SDSS) galaxies towards the position of CrB-H, a very deep and extended decrement in the cosmic microwave background (CMB), located within the Corona Borealis supercluster (CrB-SC). It was found in a survey with the Very Small Array (VSA) interferometer at 33 GHz, with a peak negative brightness temperature of -230µK, and deviates 4.4σ from the Gaussian CMB (Génova-Santos et al.). Observations with the Millimeter and Infrared Testa Grigia Observatory (MITO) suggested that 25+21–18 per cent of this decrement may be caused by the thermal Sunyaev-Zel'dovich (tSZ) effect (Battistelli et al.). Here, we investigate whether the galaxy distribution could be tracing either a previously unnoticed galaxy cluster or a warm/hot intergalactic medium (WHIM) filament that could build up this tSZ effect. We find that the projected density of galaxies outside Abell clusters and with redshifts 0.05 < z < 0.12 at the position of CrB-H is the highest in the area encompassed by the CrB-SC. Most of these galaxies are located around redshifts z = 0.07 and 0.11, but no clear connection in the form of a filamentary structure is appreciable in between. While the galaxy distribution at z = 0.07 is sparse, we find evidence at z = 0.11 of a galaxy group or a low-mass galaxy cluster. We estimate that this structure could produce a thermal Sunyaev-Zel'dovich (tSZ) effect of ~ -18µK. The remaining VSA signal of ~ -212µK is still a significant 4.1σ deviation from the Gaussian CMB. However, the MITO error bar allows for a larger tSZ effect, which could be produced by galaxy clusters or superclusters beyond the sensitivity of the SDSS. Contributions from other possible secondary anisotropies associated with these structures are also discussed.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: distances and redshifts - cosmic microwave background - cosmological parameters

Simbad objects: 20

goto Full paper

goto View the reference in ADS

Number of rows : 20

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 NAME Great Attractor SCG 10 32 -46.0           ~ 450 0
2 ACO 2022 ClG 15 04 19 +28 25.4           ~ 89 0
3 ACO 2049 ClG 15 14 44 +31 46.9           ~ 11 0
4 ACO 2056 ClG 15 19 12 +28 16.2           ~ 48 0
5 ACO 2059 ClG 15 20.2 +28 54           ~ 17 0
6 ACO 2061 ClG 15 21 20.58 +30 40 15.3           ~ 160 1
7 ACO 2062 ClG 15 21.6 +32 04           ~ 27 0
8 ACO 2065 ClG 15 22 42.6 +27 43 21           ~ 337 0
9 ACO 2067 ClG 15 23 14 +30 54.4           ~ 100 1
10 ACO 2069 ClG 15 23 57.9 +29 53 26           ~ 118 0
11 NAME Corona Borealis SCG 15 25 +29.5           ~ 116 0
12 ACO 2073 ClG 15 25 41 +28 24.5           ~ 27 0
13 ACO 2079 ClG 15 28 04.7 +28 52 40           ~ 137 0
14 ACO 2083 ClG 15 29 26 +30 44.7           ~ 35 0
15 ACO 2089 ClG 15 32 35.9 +28 01 07           ~ 101 0
16 ACO 2092 ClG 15 33 20.93 +31 09 31.7           ~ 123 0
17 ACO 2110 ClG 15 39 40.38 +30 43 16.1           ~ 66 0
18 QSO B1643+465A QSO 16 45 00.70 +46 26 13.0     20.26     ~ 57 0
19 QSO B1643+465B QSO 16 45 19.8933230820 +46 25 39.326481204     20.61     ~ 34 0
20 NAME A2069 Supercluster SCG ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010MNRAS.403.1531G and select 'bookmark this link' or equivalent in the popup menu


2020.02.20-03:19:52

© Université de Strasbourg/CNRS

    • Contact