2018MNRAS.473.4279D

Query : 2018MNRAS.473.4279D

2018MNRAS.473.4279D - Mon. Not. R. Astron. Soc., 473, 4279-4296 (2018/February-1)

A free-form lensing model of A370 revealing stellar mass dominated BCGs, in Hubble Frontier Fields images.

DIEGO J.M., SCHMIDT K.B., BROADHURST T., LAM D., VEGA-FERRERO J., ZHENG W., LEE S., MORISHITA T., BERNSTEIN G., LIM J., SILK J. and FORD H.

Abstract (from CDS):

We derive a free-form mass distribution for the unrelaxed cluster A370 (z = 0.375), using the first release of the Hubble Frontier Fields images (76 orbits) and GLASS spectroscopy. Starting from a reliable set of 10 multiply lensed systems, we produce a free-form lens model that identifies ≃80 multiple images. Good consistency is found between models using independent subsamples of these lensed systems, with detailed agreement for the well-resolved arcs. The mass distribution has two very similar concentrations centred on the two prominent brightest cluster galaxies (or BCGs), with mass profiles that are accurately constrained by a uniquely useful system of long radially lensed images centred on both BCGs. We show that the lensing mass profiles of these BCGs are mainly accounted for by their stellar mass profiles, with a modest contribution from dark matter within r < 100 kpc of each BCG. This conclusion may favour a cooled cluster gas origin for BCGs, rather than via mergers of normal galaxies for which dark matter should dominate over stars. Growth via merging between BCGs is, however, consistent with this finding, so that stars still dominate over dark matter. We do not observe any significant offset between the positions of the peaks of the dark matter distribution and the light distribution.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: strong - galaxies: clusters: individual: A370 - galaxies: elliptical and lenticular, cD - dark matter

Nomenclature: Fig. 6, Table A1: [DSB2018] A370 NN (Nos 1-30), [DSB2018] A370 NN.N N=91, [DSB2018] A370 NN.N.NN N=149.

Simbad objects: 153

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Number of rows : 153
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 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
2 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 229 0
3 [DSB2018] A370 10.4.1 EmG 02 39 49.8415 -01 34 49.652   27.916     27.144 ~ 5 0
4 [DSB2018] A370 12.3.1 LeI 02 39 50.213 -01 34 30.88           ~ 1 0
5 [DSB2018] A370 27.3.1 LeG 02 39 50.254 -01 34 23.94   25.487     25.066 ~ 5 0
6 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 747 0
7 [DSB2018] A370 11.2.1 LeG 02 39 50.583 -01 34 26.97           ~ 6 0
8 [DSB2018] A370 28.3.1 LeI 02 39 50.618 -01 34 08.47           ~ 2 0
9 [DSB2018] A370 23.1.1 LeI 02 39 50.676 -01 34 30.91           ~ 2 0
10 [DSB2018] A370 7.1.2 LeI 02 39 50.759 -01 34 47.29           ~ 1 0
11 [DSB2018] A370 7.1.1 LeG 02 39 50.770 -01 34 48.02   26.122     24.907 ~ 7 0
12 [DSB2018] A370 16.1.2 EmG 02 39 50.809 -01 34 59.57   28.814     26.244 ~ 4 0
13 [DSB2018] A370 20.2.3 LeI 02 39 50.813 -01 34 22.47           ~ 2 0
14 [DSB2018] A370 16.1.3 LeI 02 39 50.816 -01 34 58.37           ~ 2 0
15 [DSB2018] A370 4.3.3 LeI 02 39 50.851 -01 34 39.90           ~ 1 0
16 [DSB2018] A370 8.2.1 LeI 02 39 50.856 -01 34 25.10           ~ 2 0
17 [DSB2018] A370 4.3.1 LeI 02 39 50.865 -01 34 40.57           ~ 1 0
18 [DSB2018] A370 16.1.1 LeI 02 39 50.868 -01 34 59.41           ~ 2 0
19 [DSB2018] A370 4.3.2 LeI 02 39 50.879 -01 34 41.04           ~ 1 0
20 [DSB2018] A370 20.2.1 LeI 02 39 50.887 -01 34 20.41           ~ 1 0
21 [DSB2018] A370 22.1.1 LSB 02 39 50.908 -01 34 30.90         26.56 ~ 3 0
22 [DSB2018] A370 20.2.2 EmG 02 39 50.930 -01 34 19.55         27.225 ~ 4 0
23 [DSB2018] A370 9.1.1 LeG 02 39 50.976 -01 34 40.39   26.848     27.043 ~ 8 0
24 [DSB2018] A370 17.2.1 LeI 02 39 51.046 -01 34 56.08           ~ 2 0
25 [DSB2018] A370 15.2.1 LeI 02 39 51.110 -01 33 58.00           ~ 1 0
26 [DSB2018] A370 20.1.2 EmG 02 39 51.137 -01 34 14.52         27.126 ~ 4 0
27 [DSB2018] A370 20.1.1 LeI 02 39 51.147 -01 34 14.14           ~ 1 0
28 [DSB2018] A370 20.1.3 LeI 02 39 51.182 -01 34 13.29           ~ 2 0
29 [DSB2018] A370 15.3.1 LeG 02 39 51.210 -01 33 57.43           ~ 2 0
30 [DSB2018] A370 21.1.1 EmG 02 39 51.238 -01 34 56.21   26.336     25.747 ~ 4 0
31 [DSB2018] A370 15.1.1 LeI 02 39 51.259 -01 33 56.28           ~ 1 0
32 [DSB2018] A370 29.2.1 EmG 02 39 51.2686 -01 35 12.767   28.949     27.526 ~ 7 0
33 [DSB2018] A370 11.1.1 LeG 02 39 51.313 -01 34 09.70           ~ 7 0
34 [DSB2018] A370 6.2.3 LeI 02 39 51.372 -01 34 41.87           ~ 1 0
35 [DSB2018] A370 6.2.1 LeG 02 39 51.450 -01 34 41.52   27.288     22.66 ~ 8 0
36 [DSB2018] A370 8.1.1 LeI 02 39 51.473 -01 34 11.37           ~ 2 0
37 [DSB2018] A370 6.2.2 LeI 02 39 51.477 -01 34 42.04           ~ 1 0
38 [DSB2018] A370 3.3.3 LeI 02 39 51.487 -01 34 03.19           ~ 1 0
39 [DSB2018] A370 29.1.1 EmG 02 39 51.6670 -01 35 16.100           ~ 6 0
40 [DSB2018] A370 14.1.1 LeI 02 39 51.706 -01 34 40.88           ~ 2 0
41 [DSB2018] A370 3.3.1 LeG 02 39 51.756 -01 34 00.68         24.08 ~ 9 0
42 [DSB2018] A370 3.3.2 LeI 02 39 51.813 -01 34 00.26           ~ 1 0
43 [DSB2018] A370 3.3.4 LeI 02 39 51.883 -01 33 59.74           ~ 2 0
44 [DSB2018] A370 24.3.1 LeI 02 39 51.901 -01 34 35.45   27.828     24.588 ~ 3 0
45 [DSB2018] A370 22.3.1 LeI 02 39 51.975 -01 34 10.81           ~ 1 0
46 [DSB2018] A370 26.3.1 LeI 02 39 51.978 -01 35 04.61           ~ 1 0
47 [DSB2018] A370 26.1.1 LeI 02 39 52.092 -01 35 05.46   25.821     25.539 ~ 3 0
48 [DSB2018] A370 21.2.1 EmG 02 39 52.094 -01 35 04.41   27.060     26.382 ~ 4 0
49 [DSB2018] A370 1.2.1 LeG 02 39 52.100 -01 34 36.86   24.304     23.178 ~ 8 0
50 [DSB2018] A370 3.2.4 LeI 02 39 52.155 -01 33 58.03           ~ 2 0
51 [DSB2018] A370 26.2.1 LeI 02 39 52.172 -01 35 06.10           ~ 1 0
52 [DSB2018] A370 23.3.1 LeI 02 39 52.198 -01 34 08.29           ~ 1 0
53 [DSB2018] A370 1.2.2 LeI 02 39 52.209 -01 34 36.38           ~ 1 0
54 [DSB2018] A370 2.3.10 LeI 02 39 52.253 -01 35 02.08           ~ 1 0
55 [DSB2018] A370 14.2.1 LeI 02 39 52.304 -01 34 38.45           ~ 1 0
56 [DSB2018] A370 19.1.1 LeI 02 39 52.321 -01 34 15.15           ~ 1 0
57 [DSB2018] A370 2.3.4 LeI 02 39 52.332 -01 35 03.29           ~ 2 0
58 [DSB2018] A370 3.2.2 LeI 02 39 52.335 -01 33 57.22           ~ 1 0
59 [DSB2018] A370 28.1.1 LeI 02 39 52.344 -01 33 53.37           ~ 2 0
60 [DSB2018] A370 1.3.2 LeI 02 39 52.352 -01 34 35.92           ~ 1 0
61 [DSB2018] A370 2.3.2 LeI 02 39 52.379 -01 35 03.34   25.482     24.030 ~ 4 0
62 [DSB2018] A370 2.3.9 LeI 02 39 52.422 -01 35 02.97           ~ 1 0
63 [DSB2018] A370 2.3.3 LeI 02 39 52.429 -01 35 04.14           ~ 2 0
64 [DSB2018] A370 3.2.1 LeG 02 39 52.447 -01 33 56.92   24.399     24.529 ~ 8 0
65 [DSB2018] A370 19.2.1 LeI 02 39 52.456 -01 34 18.34           ~ 1 0
66 [DSB2018] A370 1.3.1 LeG 02 39 52.46 -01 34 35.8   24.247     23.075 ~ 7 0
67 [DSB2018] A370 5.3.2 LeI 02 39 52.459 -01 35 20.33           ~ 1 0
68 [DSB2018] A370 2.3.1 LeG 02 39 52.499 -01 35 04.27         20.88 ~ 8 0
69 [DSB2018] A370 3.2.3 LeI 02 39 52.509 -01 33 56.65           ~ 1 0
70 [DSB2018] A370 7.4.1 LeG 02 39 52.514 -01 35 08.28   26.385     25.208 ~ 7 0
71 [DSB2018] A370 7.4.2 LeI 02 39 52.544 -01 35 08.19           ~ 1 0
72 [DSB2018] A370 24.2.1 LeI 02 39 52.544 -01 34 32.90   27.764     24.886 ~ 3 0
73 [DSB2018] A370 5.3.1 LeI 02 39 52.563 -01 35 20.61           ~ 2 0
74 [DSB2018] A370 7.6.1 LeI 02 39 52.569 -01 34 38.92           ~ 2 0
75 [DSB2018] A370 7.6.2 LeI 02 39 52.569 -01 34 37.93           ~ 1 0
76 [DSB2018] A370 6.1.2 LeI 02 39 52.645 -01 34 38.29           ~ 1 0
77 [DSB2018] A370 2.4.1 LeG 02 39 52.662 -01 35 05.04         20.88 ~ 7 0
78 [DSB2018] A370 6.1.1 LeG 02 39 52.662 -01 34 37.94         24.613 ~ 8 0
79 [DSB2018] A370 9.2.1 LeG 02 39 52.676 -01 34 34.56   27.148     27.208 ~ 8 0
80 [DSB2018] A370 12.2.1 EmG 02 39 52.703 -01 33 59.85           ~ 5 0
81 [DSB2018] A370 7.3.2 LeI 02 39 52.706 -01 34 47.50           ~ 1 0
82 [DSB2018] A370 5.3.3 LeI 02 39 52.711 -01 35 20.82           ~ 1 0
83 [DSB2018] A370 2.5.1 LeI 02 39 52.715 -01 35 05.43   24.356     21.858 ~ 4 0
84 [DSB2018] A370 6.1.3 LeI 02 39 52.737 -01 34 37.87           ~ 1 0
85 [DSB2018] A370 7.3.1 LeG 02 39 52.746 -01 34 49.55   25.590     24.400 ~ 8 0
86 [DSB2018] A370 7.2.1 LeG 02 39 52.76 -01 34 50.4   27.557     26.341 ~ 7 0
87 [DSB2018] A370 7.2.2 LeI 02 39 52.815 -01 34 53.33           ~ 1 0
88 [DSB2018] A370 5.2.3 LeI 02 39 52.928 -01 35 21.10           ~ 1 0
89 [DSB2018] A370 4.2.2 LeI 02 39 52.956 -01 34 35.09           ~ 1 0
90 [DSB2018] A370 4.2.1 LeI 02 39 52.973 -01 34 34.57           ~ 1 0
91 [DSB2018] A370 4.2.3 LeI 02 39 52.984 -01 34 33.79           ~ 1 0
92 [DSB2018] A370 2.2.1 LeG 02 39 53.029 -01 35 06.17   24.785     22.063 ~ 8 0
93 [DSB2018] A370 5.2.1 LeG 02 39 53.048 -01 35 21.21   25.067     24.246 ~ 7 0
94 [DSB2018] A370 5.2.2 LeI 02 39 53.155 -01 35 21.25           ~ 1 0
95 [DSB2018] A370 2.2.3 LeI 02 39 53.305 -01 35 05.83           ~ 2 0
96 [DSB2018] A370 10.2.2 LeI 02 39 53.348 -01 34 41.67           ~ 1 0
97 [DSB2018] A370 10.2.1 EmG 02 39 53.3542 -01 34 41.128           ~ 5 0
98 [DSB2018] A370 2.2.2 LeI 02 39 53.383 -01 35 05.41           ~ 2 0
99 [DSB2018] A370 27.1.1 EmG 02 39 53.386 -01 34 01.78           ~ 4 0
100 [DSB2018] A370 2.2.4 LeI 02 39 53.429 -01 35 05.25           ~ 2 0
101 [DSB2018] A370 2.1.4 LeI 02 39 53.523 -01 35 04.43           ~ 2 0
102 [DSB2018] A370 2.1.10 LeI 02 39 53.528 -01 35 03.64           ~ 1 0
103 [DSB2018] A370 2.1.2 LeI 02 39 53.608 -01 35 03.64           ~ 2 0
104 [DSB2018] A370 5.1.2 LeI 02 39 53.614 -01 35 20.61           ~ 1 0
105 [DSB2018] A370 2.1.3 LeI 02 39 53.629 -01 35 03.90           ~ 2 0
106 [DSB2018] A370 5.1.1 LeG 02 39 53.632 -01 35 20.58   26.151     25.468 ~ 8 0
107 [DSB2018] A370 5.1.3 LeI 02 39 53.658 -01 35 20.49           ~ 1 0
108 [DSB2018] A370 2.1.5 LeI 02 39 53.718 -01 35 03.70           ~ 1 0
109 [DSB2018] A370 2.1.1 LeG 02 39 53.724 -01 35 03.21         21.81 ~ 8 0
110 [DSB2018] A370 2.1.9 LeI 02 39 53.749 -01 35 02.06           ~ 1 0
111 [DSB2018] A370 2.1.6 LeI 02 39 53.782 -01 35 03.71           ~ 1 0
112 [DSB2018] A370 10.3.1 LeI 02 39 53.804 -01 35 08.19           ~ 1 0
113 [DSB2018] A370 2.1.8 LeI 02 39 53.819 -01 35 02.70           ~ 1 0
114 [DSB2018] A370 10.3.2 LeI 02 39 53.832 -01 35 08.09           ~ 1 0
115 [DSB2018] A370 2.1.7 LeI 02 39 53.835 -01 35 03.46           ~ 1 0
116 [DSB2018] A370 18.2.1 EmG 02 39 53.8574 -01 35 09.966   27.345     26.720 ~ 5 0
117 [DSB2018] A370 30.2.1 LeI 02 39 54.015 -01 34 25.65           ~ 1 0
118 [DSB2018] A370 13.2.1 EmG 02 39 54.0492 -01 34 07.712         25.899 ~ 7 0
119 [DSB2018] A370 1.1.1 LeG 02 39 54.310 -01 34 33.75   25.192     24.150 ~ 8 0
120 [DSB2018] A370 17.1.1 LeI 02 39 54.328 -01 34 55.92           ~ 2 0
121 [DSB2018] A370 1.1.2 LeI 02 39 54.333 -01 34 33.40           ~ 1 0
122 [DSB2018] A370 25.2.1 LeI 02 39 54.395 -01 35 00.97           ~ 1 0
123 [DSB2018] A370 3.1.3 LeI 02 39 54.431 -01 34 01.23           ~ 1 0
124 [DSB2018] A370 30.1.1 EmG 02 39 54.517 -01 34 25.65   27.591     26.385 ~ 3 0
125 [DSB2018] A370 3.1.1 LeI 02 39 54.543 -01 34 01.89           ~ 1 0
126 [DSB2018] A370 3.1.2 LeI 02 39 54.546 -01 34 01.79           ~ 1 0
127 [DSB2018] A370 3.1.4 LeI 02 39 54.607 -01 34 02.07           ~ 1 0
128 [DSB2018] A370 25.1.1 LeI 02 39 54.652 -01 34 58.05           ~ 1 0
129 [DSB2018] A370 24.1.1 LeI 02 39 54.714 -01 34 33.15   27.445     24.738 ~ 3 0
130 [DSB2018] A370 6.3.3 LeI 02 39 55.031 -01 34 37.64           ~ 1 0
131 [DSB2018] A370 13.1.1 EmG 02 39 55.0854 -01 34 18.390         25.544 ~ 7 0
132 [DSB2018] A370 4.1.3 LeG 02 39 55.089 -01 34 34.21         24.37 ~ 7 0
133 [DSB2018] A370 6.3.1 LeG 02 39 55.115 -01 34 37.53   27.706     24.385 ~ 8 0
134 [DSB2018] A370 4.1.1 LeI 02 39 55.116 -01 34 34.99           ~ 1 0
135 [DSB2018] A370 6.3.2 LeI 02 39 55.137 -01 34 37.89           ~ 1 0
136 [DSB2018] A370 4.1.2 LeI 02 39 55.137 -01 34 35.51           ~ 1 0
137 [DSB2018] A370 28.2.1 LeI 02 39 55.261 -01 34 00.35           ~ 1 0
138 [DSB2018] A370 27.2.1 EmG 02 39 55.366 -01 34 16.02   25.662     25.154 ~ 4 0
139 [DSB2018] A370 10.1.2 LeI 02 39 55.508 -01 34 41.68           ~ 1 0
140 [DSB2018] A370 10.1.1 EmG 02 39 55.515 -01 34 41.37           ~ 5 0
141 [DSB2018] A370 18.1.1 EmG 02 39 55.6020 -01 34 46.867   27.379     26.600 ~ 5 0
142 [DSB2018] A370 9.3.1 LeG 02 39 55.684 -01 34 35.52   27.024     26.826 ~ 8 0
143 [DSB2018] A370 14.3.1 LeI 02 39 55.751 -01 34 37.11           ~ 2 0
144 [DSB2018] A370 23.2.1 LeI 02 39 56.110 -01 34 22.42           ~ 1 0
145 [DSB2018] A370 22.2.1 LeI 02 39 56.173 -01 34 24.08           ~ 2 0
146 [DSB2018] A370 12.1.1 EmG 02 39 56.188 -01 34 15.09           ~ 6 0
147 [DSB2018] A370 8.3.1 LeI 02 39 56.650 -01 34 25.38           ~ 1 0
148 [DSB2018] A370 7.5.1 LeG 02 39 56.773 -01 34 39.29   26.679     25.383 ~ 5 0
149 [DSB2018] A370 7.5.2 LeI 02 39 56.773 -01 34 38.93           ~ 1 0
150 [DSB2018] A370 16.2.2 EmG 02 39 56.900 -01 34 44.77   29.646     27.662 ~ 4 0
151 [DSB2018] A370 16.2.3 LeI 02 39 56.947 -01 34 43.54           ~ 2 0
152 [DSB2018] A370 16.2.1 LeI 02 39 56.958 -01 34 43.92           ~ 2 0
153 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0

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