2022MNRAS.511.2610C

Query : 2022MNRAS.511.2610C

2022MNRAS.511.2610C - Mon. Not. R. Astron. Soc., 511, 2610-2630 (2022/April-1)

Measuring the Milky Way mass distribution in the presence of the LMC.

CORREA MAGNUS L. and VASILIEV E.

Abstract (from CDS):

The ongoing interaction between the Milky Way (MW) and its largest satellite - the Large Magellanic Cloud (LMC) - creates a significant perturbation in the distribution and kinematics of distant halo stars, globular clusters and satellite galaxies, and leads to biases in MW mass estimates from these tracer populations. We present a method for compensating these perturbations for any choice of MW potential by computing the past trajectory of LMC and MW and then integrating the orbits of tracer objects back in time until the influence of the LMC is negligible, at which point the equilibrium approximation can be used with any standard dynamical modelling approach. We add this orbit-rewinding step to the mass estimation approach based on simultaneous fitting of the potential and the distribution function of tracers, and apply it to two data sets with the latest Gaia EDR3 measurements of 6D phase-space coordinates: globular clusters and satellite galaxies. We find that models with LMC mass in the range (1-2) ×1011 M☉ better fit the observed distribution of tracers, and measure MW mass within 100 kpc to be (0.75±0.1)×1012 M☉, while neglecting the LMC perturbation increases it by ∼15 per cent.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): globular clusters: general - Galaxy: kinematics and dynamics - Local Group - Magellanic Clouds

Simbad objects: 79

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Number of rows : 79
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
5 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
6 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
7 DELVE 2 Cl* 01 55 05 -68 15.2     17.16     ~ 20 0
8 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 177 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 Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
13 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 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 E 1 GlC 03 55 02.5 -49 36 52           ~ 229 0
23 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
24 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
25 NAME Col I G 05 31.4 -28 02           ~ 60 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 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
30 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
31 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
32 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
33 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
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 Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
45 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
46 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
47 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
48 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
49 C 1353-269 GlC 13 56 21.702 -27 10 03.00           ~ 146 0
50 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
51 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
52 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
53 NAME Munoz 1 Cl* 15 01 48.02 +66 58 07.3           ~ 29 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 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
58 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
59 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
60 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
61 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
62 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 460 0
63 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
64 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 357 0
65 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
66 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
67 NAME Chenab Stream St* 21 17 -59.9           ~ 45 0
68 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0
69 NAME Gru II G 22 04.1 -46 26           ~ 110 0
70 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
71 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
72 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
73 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
74 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
75 NAME Pisces Overdensity G 23 19.0 +00 00           ~ 65 0
76 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
77 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
78 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
79 NAME Local Group GrG ~ ~           ~ 9325 0

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