2019ApJ...874...33S

Query : 2019ApJ...874...33S

2019ApJ...874...33S - Astrophys. J., 874, 33-33 (2019/March-3)

Deriving galaxy cluster velocity anisotropy profiles from a joint analysis of dynamical and weak lensing data.

STARK A., MILLER C.J. and HALENKA V.

Abstract (from CDS):

We present an analytic approach to lift the mass-anisotropy degeneracy in clusters of galaxies by utilizing the line-of-sight velocity dispersion of clustered galaxies jointly with weak lensing inferred masses. More specifically, we solve the spherical Jeans equation by assuming a simple relation between the line-of-sight velocity dispersion and the radial velocity dispersion and recast the Jeans equation as a Bernoulli differential equation that has a well-known analytic solution. We first test our method in cosmological N-body simulations and then derive the anisotropy profiles for 35 archival data galaxy clusters with an average redshift of <zc>=0.25. The resulting profiles yield a weighted average global value of <β(0.2≤ R/R200≤ 1)>=0.35±0.28 (stat) ±0.15 (sys). This indicates that clustered galaxies tend to globally fall on radially anisotropic orbits. We note that this is the first attempt to derive velocity anisotropy profiles for a cluster sample of this size utilizing joint dynamical and weak lensing data.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: clusters: general - galaxies: halos - galaxies: kinematics and dynamics - methods: analytical

Simbad objects: 38

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Number of rows : 38
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 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 815 0
2 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 635 1
3 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 186 0
4 ACO 70 ClG 00 37 20 -07 25.5           ~ 8 0
5 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
6 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 258 3
7 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 230 0
8 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 359 0
9 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
10 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 258 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 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 327 0
14 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 400 0
15 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 283 0
16 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 454 0
17 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 106 0
18 ACO 1423 ClG 11 57 17.3206 +33 36 39.364           ~ 168 0
19 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 246 0
20 ACO 1553 ClG 12 30 48.000 +10 33 21.60           ~ 82 0
21 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4804 2
22 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 141 1
23 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
24 ACO 1698 ClG 13 14 16.4165 -07 02 28.310           ~ 15 0
25 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 312 0
26 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 689 1
27 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
28 ACO 2009 ClG 15 00 15.2 +21 22 09           ~ 101 0
29 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 175 0
30 ACO 2034 ClG 15 10 12.96 +33 29 53.2           ~ 215 1
31 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
32 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 180 0
33 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
34 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 563 0
35 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 359 0
36 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 117 0
37 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 255 0
38 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 271 0

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