2017ApJ...845...55P

Query : 2017ApJ...845...55P

2017ApJ...845...55P - Astrophys. J., 845, 55-55 (2017/August-2)

The cosmic V-web.

POMAREDE D., HOFFMAN Y., COURTOIS H.M. and TULLY R.B.

Abstract (from CDS):

The network of filaments with embedded clusters surrounding voids, which has been seen in maps derived from redshift surveys and reproduced in simulations, has been referred to as the cosmic web. A complementary description is provided by considering the shear in the velocity field of galaxies. The eigenvalues of the shear provide information regarding whether or not a region is collapsing in three dimensions, which is the condition for a knot, expanding in three dimensions, which is the condition for a void, or in the intermediate condition of a filament or sheet. The structures that are quantitatively defined by the eigenvalues can be approximated by iso-contours that provide a visual representation of the cosmic velocity (V) web. The current application is based on radial peculiar velocities from the Cosmicflows-2 collection of distances. The three-dimensional velocity field is constructed using the Wiener filter methodology in the linear approximation. Eigenvalues of the velocity shear are calculated at each point on a grid. Here, knots and filaments are visualized across a local domain of diameter ∼0.1c.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: distances and redshifts - large-scale structure of universe - large-scale structure of universe

Simbad objects: 24

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Number of rows : 24
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 NAME Psc-Per Supercluster SCG 02 33.2 +41 37           ~ 444 1
2 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
3 NGC 1600 rG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 409 1
4 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2
5 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
6 NAME Great Attractor SCG 10 32 -46.0           ~ 617 0
7 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
8 NAME UMa Region reg 11 00 +50.0           ~ 333 0
9 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
10 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
11 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
12 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
13 ACO 3537 ClG 13 01 01.64 -32 26 20.6           ~ 52 3
14 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
15 ACO 3565 ClG 13 36 39 -33 58.3           ~ 116 1
16 NAME IC 4329 Group GrG 13 48 36.4 -30 30 13           ~ 147 2
17 ACO S 753 ClG 14 03 35.9 -33 59 16           ~ 91 1
18 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
19 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 340 2
20 NAME Local Void vid 18 38 +18.0           ~ 234 0
21 NGC 7242 GiG 22 15 39.507 +37 17 55.48   14.6       ~ 50 0
22 NAME Laniakea Supercluster SCG ~ ~           ~ 61 0
23 NAME Scl Void vid ~ ~           ~ 25 0
24 NAME Arch Cluster ClG ~ ~           ~ 3 0

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