2023MNRAS.521.3540M

Query : 2023MNRAS.521.3540M

2023MNRAS.521.3540M - Mon. Not. R. Astron. Soc., 521, 3540-3552 (2023/May-3)

The LMC impact on the kinematics of the Milky Way satellites: clues from the running solar apex.

MAKAROV D., KHOPERSKOV S., MAKAROV D., MAKAROVA L., LIBESKIND N. and SALOMON J.-B.

Abstract (from CDS):

Dwarf galaxies provide a unique opportunity for studying the evolution of the Milky Way (MW) and the Local Group as a whole. Analysing the running solar apex based on the kinematics of the MW satellites, we discovered an unexpected behaviour of the dipole term of the radial velocity distribution as a function of the Galactocentric distance. The nearby satellites (<100 kpc) have a bulk motion with an amplitude of 140-230 km s–1, while the more distant ones show an isotropic distribution of the radial velocities. Such strong solar apex variations cannot be explained by the net rotation of the satellites, as it would require an enormously high rotation rate (≈970 km s–1). If we exclude the Large and Magellanic Clouds (LMC) and its most closely related members from our sample, this does not suppress the bulk motion of the nearby satellites strongly enough. Nevertheless, we have demonstrated that the observed peculiar kinematics of the MW satellites can be explained by a perturbation caused by the first infall of the LMC. First, we 'undone' the effect of the perturbation by integrating the orbits of the MW satellites backwards (forwards) with (without) massive LMC. It appears that the present-day peculiar enhancement of the solar apex in the inner halo is diminished the most in the case of 2 × 1011 M⊙ LMC. Next, in self-consistent high-resolution N-body simulations of the MW-LMC interaction, we found that the solar apex shows the observed behaviour only for the halo particles with substantial angular momentum, comparable to that of the MW satellites.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: formation - galaxies: groups: general - galaxies: kinematics and dynamics - Local Group

Simbad objects: 76

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Number of rows : 76
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
6 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
7 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
8 DELVE 2 Cl* 01 55 05 -68 15.2     17.16     ~ 20 0
9 NAME Cetus III Dwarf Galaxy LSB 02 05 19.40 -04 16 12.0           ~ 32 0
10 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
11 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
12 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
13 [LPS2017] DES J0225+0304 G? 02 25 42.40 +03 04 10.1           ~ 23 0
14 NAME Hydrus I G 02 29 33.4 -79 18 32           ~ 80 0
15 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
16 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
17 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
18 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
19 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
20 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
21 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
22 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
24 NAME Col I G 05 31.4 -28 02           ~ 60 0
25 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
26 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
27 NAME Pic II G 06 44 43 -59 53.8           ~ 33 0
28 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
29 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
30 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
31 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
32 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
33 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
34 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
35 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
36 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
37 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
38 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
39 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
40 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
41 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
42 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 117 1
43 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
44 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
45 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
46 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
47 NAME Centaurus I G 12 38 20 -40 54.1     14.78     ~ 29 0
48 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
49 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
50 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
51 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
52 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
53 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
54 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
55 NAME Bootes IV LSB 15 34 45 +43 43.6           ~ 24 0
56 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
57 DELVE 1 Cl* 16 30 54 -00 58.3     16.19     ~ 19 0
58 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
59 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
60 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
61 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
62 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
63 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
64 NAME Ind II G 20 38.9 -46 10           ~ 31 0
65 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
66 NAME Gru II G 22 04.1 -46 26           ~ 110 0
67 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
68 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
69 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
70 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
71 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
72 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
73 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
74 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
75 NAME Local Group GrG ~ ~           ~ 9325 0
76 NAME MW Group GrG ~ ~           ~ 22 0

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