2011MNRAS.415.1961F

Query : 2011MNRAS.415.1961F

2011MNRAS.415.1961F - Mon. Not. R. Astron. Soc., 415, 1961-1966 (2011/August-1)

An estimate of the electron density in filaments of galaxies at z∼ 0.1.

FRASER-McKELVIE A., PIMBBLET K.A. and LAZENDIC J.S.

Abstract (from CDS):

Most of the baryons in the Universe are thought to be contained within filaments of galaxies, but as yet, no single study has published the observed properties of a large sample of known filaments to determine typical physical characteristics such as temperature and electron density. This paper presents a comprehensive large-scale search conducted for X-ray emission from a population of 41 bona fide filaments of galaxies to determine their X-ray flux and electron density. The sample is generated from the filament catalogue of Pimbblet et al., which is in turn sourced from the two-degree Field Galaxy Redshift Survey (2dFGRS). Since the filaments are expected to be very faint and of very low density, we used stacked ROSAT All-Sky Survey data. We detect a net surface brightness from our sample of filaments of (1.6±0.1) {x} 10–14 erg/cm2/s/arcmin2 in the 0.9-1.3 keV energy band for 1-keV plasma, which implies an electron density of ne= (4.7±0.2) {x} 10–4 h1/2100/cm3. Finally, we examine if a filament's membership to a supercluster leads to an enhanced electron density as reported by Kull & Böhringer. We suggest it remains unclear if supercluster membership causes such an enhancement.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): galaxies: clusters: general - cosmology: observations - large-scale structure of Universe - X-rays: general

Simbad objects: 59

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Number of rows : 59
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 2734 ClG 00 11 21.60 -28 51 16.6           ~ 156 0
2 ACO 2741 ClG 00 13 40.90 -32 29 16.1           ~ 6 0
3 APMCC 39 ClG 00 17 37.6 -31 28 14           ~ 5 0
4 EDCC 445 ClG 00 28 33.00 -27 30 23.7           ~ 6 0
5 ACO 2780 ClG 00 30 04.61 -29 27 27.6           ~ 16 0
6 NAME SCULPTOR SUPERCL SCG 00 31.7 -29 49           ~ 43 1
7 NAME PSC-CET SUPERCL SCG 00 33 -21.0           ~ 67 2
8 EDCC 457 ClG 00 36 03.81 -26 05 29.3           ~ 7 0
9 ACO 2794 ClG 00 36 33 -31 01.5           ~ 12 0
10 APMCC 94 ClG 00 37 43.4 -30 50 59           ~ 4 0
11 EDCC 465 ClG 00 38 52.54 -27 16 37.5           ~ 4 0
12 ACO 2814 ClG 00 42 08.82 -28 32 08.8           ~ 15 0
13 ACO 2829 ClG 00 51 22.73 -28 31 39.3           ~ 34 0
14 EDCC 492 ClG 00 54 08.36 -30 59 40.9           ~ 4 0
15 ACO 118 ClG 00 55 43.9 -26 24 46           ~ 44 0
16 EDCC 511 ClG 00 58 20.28 -31 01 49.7           ~ 4 0
17 EDCC 517 ClG 01 02 35.86 -33 20 44.5           ~ 4 0
18 ACO 2878 ClG 01 10 01.77 -29 40 58.3           ~ 9 0
19 APMCC 167 ClG 01 23 30.9 -32 56 12           ~ 5 0
20 ACO 2915 ClG 01 28 57.00 -29 00 41.4           ~ 18 0
21 SCl 28 SCG 01 31.5 -27 26           ~ 4 0
22 EDCC 581 ClG 01 35 31.71 -25 36 54.8           ~ 4 0
23 ACO 222 ClG 01 37 31.1 -12 59 30           ~ 153 1
24 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 135 1
25 ACO 2967 ClG 02 02 46.10 -28 17 22.4           ~ 7 0
26 SCl 232 SCG 02 04 -28.1           ~ 3 0
27 ACO 2972 ClG 02 05 38.70 -27 06 42.4           ~ 8 0
28 ACO 2981 ClG 02 09 53.2 -27 23 15           ~ 8 0
29 ACO 2999 ClG 02 17 20.02 -28 21 53.9           ~ 4 0
30 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 222 1
31 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 229 0
32 NAME Leo A Supercluster SCG 11 37.4 -02 46           ~ 18 0
33 ACO 1364 ClG 11 43 39.67 -01 44 41.8           ~ 61 0
34 SCl 265 SCG 11 51 -02.0           ~ 5 0
35 ACO 1411 ClG 11 55 13.63 -00 31 34.6           ~ 19 0
36 ACO 1419 ClG 11 56 11.54 -00 12 37.0           ~ 21 0
37 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
38 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
39 ACO 1770 ClG 13 40 03 +41 16.8           ~ 20 0
40 SCl 190 SCG 21 56.5 -30 21           ~ 6 2
41 EDCC 57 ClG 21 56 59.27 -30 05 58.7           ~ 6 0
42 EDCC 119 ClG 22 16 20.64 -25 40 11.8           ~ 7 0
43 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 75 0
44 EDCC 128 ClG 22 18 56.60 -28 14 08.4           ~ 4 0
45 ACO 3878 ClG 22 26 50 -31 56.7           ~ 5 0
46 SCl 199 SCG 22 40.0 -33 56           ~ 4 0
47 EDCC 187 ClG 22 46 23.75 -34 01 52.4           ~ 4 0
48 ACO S 1064 ClG 22 49 15.16 -32 51 13.8           ~ 5 0
49 APMCC 827 ClG 22 50 03.69 -31 07 38.9           ~ 8 0
50 EDCC 202 ClG 22 50 21.71 -32 40 24.6           ~ 4 0
51 EDCC 230 ClG 22 59 17.31 -30 51 05.8           ~ 5 0
52 ACO 3959 ClG 23 02 03.22 -33 26 51.1           ~ 9 0
53 EDCC 239 ClG 23 03 21.15 -33 36 17.5           ~ 4 0
54 APMCC 853 ClG 23 05 40.87 -30 47 17.1           ~ 6 0
55 ACO 3980 ClG 23 12 59.61 -28 23 16.2           ~ 5 0
56 ACO 2601 ClG 23 26 44.3 -24 25 29           ~ 11 0
57 SCl 299 SCG 23 27 -24.6           ~ 2 0
58 AK3 J233411.76-333944 ClG 23 34 12.32 -33 39 53.1           ~ 5 0
59 EDCC 365 ClG 23 55 08.43 -32 44 25.6           ~ 9 0

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