2016MNRAS.458..226D

Query : 2016MNRAS.458..226D

2016MNRAS.458..226D - Mon. Not. R. Astron. Soc., 458, 226-232 (2016/May-1)

The MeSsI (merging systems identification) algorithm and catalogue.

DE LOS RIOS M., DOMINGUEZ M.J.R., PAZ D. and MERCHAN M.

Abstract (from CDS):

Merging galaxy systems provide observational evidence of the existence of dark matter and constraints on its properties. Therefore, statistically uniform samples of merging systems would be a powerful tool for several studies. In this paper, we present a new methodology for the identification of merging systems and the results of its application to galaxy redshift surveys. We use as a starting point a mock catalogue of galaxy systems, identified using friends-of-friends algorithms, that have experienced a major merger, as indicated by its merger tree. By applying machine learning techniques in this training sample, and using several features computed from the observable properties of galaxy members, it is possible to select galaxy groups that have a high probability of having experienced a major merger. Next, we apply a mixture of Gaussian techniques on galaxy members in order to reconstruct the properties of the haloes involved in such mergers. This methodology provides a highly reliable sample of merging systems with low contamination and precisely recovered properties. We apply our techniques to samples of galaxy systems obtained from the Sloan Digital Sky Survey Data Release 7, the Wide-Field Nearby Galaxy-Cluster Survey (WINGS) and the Hectospec Cluster Survey (HeCS). Our results recover previously known merging systems and provide several new candidates. We present their measured properties and discuss future analysis on current and forthcoming samples.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

VizieR on-line data: <Available at CDS (J/MNRAS/458/226): table1.dat>

Simbad objects: 41

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Number of rows : 41
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 MCS J0025.4-1222 ClG 00 25 29.381 -12 22 37.06           ~ 151 0
2 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 296 0
3 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
4 ACO 3158 ClG 03 43 07.5 -53 38 09           ~ 327 0
5 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
6 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
7 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
8 ACO 667 ClG 08 28 05.8 +44 46 00           ~ 45 0
9 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
10 ACO 750 ClG 09 09 06.7 +11 01 48           ~ 105 1
11 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 141 0
12 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
13 ACO 1201 ClG 11 12 54.4 +13 26 08           ~ 131 1
14 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 118 0
15 ACO 1302 ClG 11 33 12.02 +66 22 26.9           ~ 81 0
16 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
17 ACO 1424 ClG 11 57 30.50 +05 05 24.5           ~ 68 0
18 ACO 3497 ClG 12 00 03 -31 23.7           ~ 42 0
19 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 149 1
20 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 266 2
21 MCXC J1332.7+5032 ClG 13 32 44.8 +50 32 24           ~ 134 0
22 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
23 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
24 ACO 1902 ClG 14 21 39.7 +37 17 43           ~ 67 0
25 ACO 1918 ClG 14 25 22.7 +63 11 14           ~ 71 0
26 ACO 1930 ClG 14 32 42.6 +31 34 07           ~ 63 0
27 ACO 2009 ClG 15 00 15.2 +21 22 09           ~ 113 0
28 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
29 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
30 ACO 2048 ClG 15 15 14.11 +04 23 10.4           ~ 109 0
31 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 122 0
32 ACO 2069 ClG 15 24 02.92 +29 53 20.3           ~ 165 0
33 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 188 0
34 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
35 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
36 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
37 ZwCl 1717+5636 ClG 17 18 09.272 +56 40 00.02           ~ 53 1
38 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 131 0
39 ACO 3716 ClG 20 51 16.7 -52 41 43           ~ 123 1
40 ACO 2382 ClG 21 51 57.2984 -15 36 48.067           ~ 122 0
41 ACO 2593 ClG 23 24 27.15 +14 33 40.2           ~ 231 0

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