2020MNRAS.499.3755S

Query : 2020MNRAS.499.3755S

2020MNRAS.499.3755S - Mon. Not. R. Astron. Soc., 499, 3755-3774 (2020/December-2)

An updated detailed characterization of planes of satellites in the MW and M31.

SANTOS-SANTOS I.M., DOMINGUEZ-TENREIRO R. and PAWLOWSKI M.S.

Abstract (from CDS):

We present a detailed characterization of planes of satellite galaxies in the Milky Way (MW) and M31. For a positional analysis, we introduce an extension to the '4-galaxy-normal density plot' method from Pawlowski, Kroupa & Jerjen. It finds the normal directions to the predominant planar configurations of satellites of a system, yielding for each a collection of planes of increasing member satellites. This allows to quantify the quality of planes in terms of population (Nsat) and spatial flattening (c/a). We apply this method to the latest data for confirmed MW and M31 satellite samples, with 46 and 34 satellites, respectively. New MW satellites form part of planes previously identified from a smaller sample of Nsat= 27: we identify a new plane with Nsat = 39 as thin as the VPOS-3 (c/a ∼ 0.2), and with roughly the same normal direction; so far the most populated plane that thin reported in the Local Group. We introduce a new method to determine, using kinematic data, the axis of maximum co-orbitation of MW satellites. Interestingly, this axis approximately coincides with the normal to the former plane: ≥45±5 per cent of satellites co-orbit. In M31 we discover a plane with Nsat = 18 and c/a ∼ 0.15, i.e. quality comparable to the GPoA, and perpendicular to it. This structure is viewed face-on from the Sun making it susceptible to M31 satellite distance uncertainties. An estimation of the perpendicular velocity dispersion suggests that it is dynamically unstable. Finally we find that mass is not a property determining a satellite's membership to good quality planes.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - galaxies: dwarf - galaxies: kinematics and dynamics - Local Group - cosmology: theory

Simbad objects: 103

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Number of rows : 103
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 Tuc IV G 00 02.9 -60 51           ~ 90 0
2 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
3 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
4 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
5 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
6 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
7 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
8 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
9 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
10 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
11 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
12 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
13 NAME Andromeda XXVII G 00 37 27.1 +45 23 13     16.7     ~ 82 0
14 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
15 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
16 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
17 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
18 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
19 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
20 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
21 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
22 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
23 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
24 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
25 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
26 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
27 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
28 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
29 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
30 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
31 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
32 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
33 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
34 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
35 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
36 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
37 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
38 NAME Cetus III Dwarf Galaxy LSB 02 05 19.40 -04 16 12.0           ~ 32 0
39 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
40 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
41 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
42 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
43 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
44 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 43 0
45 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
46 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
47 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
48 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
49 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
50 NAME Col I G 05 31.4 -28 02           ~ 60 0
51 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
52 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
53 NAME Pic II G 06 44 43 -59 53.8           ~ 33 0
54 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 203 1
55 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
56 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
57 NAME Hydra I overdensity As* 08 56 +03.5           ~ 8 0
58 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
59 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
60 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
61 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
62 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
63 NAME Car II HII Region HII 10 44 47 -59 38.8           ~ 40 0
64 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
65 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
66 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
67 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
68 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
69 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
70 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
71 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
72 NAME Centaurus I G 12 38 20 -40 54.1     14.78     ~ 29 0
73 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
74 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 274 0
75 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
76 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
77 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
78 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
79 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
80 NAME Bootes IV LSB 15 34 45 +43 43.6           ~ 24 0
81 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
82 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
83 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
84 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
85 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
86 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
87 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
88 NAME Gru II G 22 04.1 -46 26           ~ 110 0
89 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
90 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
91 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
92 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
93 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
94 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
95 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 307 1
96 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
97 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
98 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
99 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
100 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
101 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
102 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
103 NAME Local Group GrG ~ ~           ~ 9325 0

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