2022MNRAS.513.4968R

Query : 2022MNRAS.513.4968R

2022MNRAS.513.4968R - Mon. Not. R. Astron. Soc., 513, 4968-4982 (2022/July-2)

Sizing from the smallest scales: the mass of the Milky Way.

RODRIGUEZ WIMBERLY M.K., COOPER M.C., BAXTER D.C., BOYLAN-KOLCHIN M., BULLOCK J.S., FILLINGHAM S.P., JI A.P., SALES L.V. and SIMON J.D.

Abstract (from CDS):

As the Milky Way and its satellite system become more entrenched in near field cosmology efforts, the need for an accurate mass estimate of the Milky Way's dark matter halo is increasingly critical. With the second and early third data releases of stellar proper motions from Gaia, several groups calculated full 6D phase-space information for the population of Milky Way satellite galaxies. Utilizing these data in comparison to subhalo properties drawn from the Phat ELVIS simulations, we constrain the Milky Way dark matter halo mass to be ∼1-1.2 x 1012 M☉. We find that the kinematics of subhaloes drawn from more- or less-massive hosts (i.e. >1.2 x 1012 M☉ or <1012 M☉) are inconsistent, at the 3σ confidence level, with the observed velocities of the Milky Way satellites. The preferred host halo mass for the Milky Way is largely insensitive to the exclusion of systems associated with the Large Magellanic Cloud, changes in galaxy formation thresholds, and variations in observational completeness. As more Milky Way satellites are discovered, their velocities (radial, tangential, and total) plus Galactocentric distances will provide further insight into the mass of the Milky Way dark matter halo.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): Galaxy: fundamental parameters - galaxies: dwarf - galaxies: evolution - galaxies: general - galaxies: kinematics and dynamics - Local Group

Simbad objects: 52

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Number of rows : 52
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 Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
4 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
5 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
6 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
7 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
8 [LPS2017] DES J0225+0304 G? 02 25 42.40 +03 04 10.1           ~ 23 0
9 NAME Hydrus I G 02 29 33.4 -79 18 32           ~ 80 0
10 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
11 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
12 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
13 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
14 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
15 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
16 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
17 NAME Col I G 05 31.4 -28 02           ~ 60 0
18 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
19 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
20 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
21 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
22 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
23 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
24 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
25 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
26 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
27 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
28 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
29 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
30 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
31 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
32 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
33 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
34 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
35 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
36 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
37 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
38 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
39 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
40 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
41 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
42 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
43 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
44 NAME Gru II G 22 04.1 -46 26           ~ 110 0
45 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
46 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
47 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
48 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
49 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
50 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
51 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
52 NAME Local Group GrG ~ ~           ~ 9325 0

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