2017MNRAS.465.1879S

Query : 2017MNRAS.465.1879S

2017MNRAS.465.1879S - Mon. Not. R. Astron. Soc., 465, 1879-1888 (2017/February-3)

Identifying true satellites of the Magellanic Clouds.

SALES L.V., NAVARRO J.F., KALLIVAYALIL N. and FRENK C.S.

Abstract (from CDS):

The hierarchical nature of ΛCDM suggests that the Magellanic Clouds must have been surrounded by a number of satellites before their infall into the Milky Way halo. Many of those satellites should still be in close proximity to the Clouds, but some could have dispersed ahead/behind the Clouds along their Galactic orbit. Either way, prior association with the Clouds constrains the present-day positions and velocities of candidate Magellanic satellites: they must lie close to the nearly polar orbital plane of the Magellanic Stream, and their distances and radial velocities must follow the latitude dependence expected for a tidal stream with the Clouds near pericentre. We use a cosmological numerical simulation of the disruption of a massive sub-halo in a Milky Way-sized ΛCDM halo to test whether any of the 20 dwarfs recently discovered in the Dark Energy Survey, the Survey of the MAgellanic Stellar History, Pan-STARRS, and ATLAS surveys are truly associated with the Clouds. Of the six systems with kinematic data, only Hor 1 has distance and radial velocities consistent with a Magellanic origin. Of the remaining dwarfs, six (Hor 2, Eri 3, Ret 3, Tuc 4, Tuc 5, and Phx 2) have positions and distances consistent with a Magellanic origin, but kinematic data are needed to substantiate that possibility. Conclusive evidence for association would require proper motions to constrain the orbital angular momentum direction, which, for true Magellanic satellites, must be similar to that of the Clouds. We use this result to predict radial velocities and proper motions for all new dwarfs, assuming that they were Magellanic satellites. Our results are relatively insensitive to the assumption of first or second pericentre for the Clouds.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: haloes - galaxies: kinematics and dynamics - galaxies: kinematics and dynamics

Simbad objects: 46

goto Full paper

goto View the references in ADS

Number of rows : 46
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 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 Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
6 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
7 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
8 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
10 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
11 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
12 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
13 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
14 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
15 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
16 NAME Col I G 05 31.4 -28 02           ~ 60 0
17 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
18 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
19 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
20 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
21 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
22 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
23 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
24 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
25 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
26 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
27 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
28 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
29 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
30 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
31 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
32 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
33 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
34 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
35 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
36 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
37 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
38 NAME Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 75 0
39 NAME Gru II G 22 04.1 -46 26           ~ 110 0
40 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
41 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
42 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
43 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
44 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
45 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
46 NAME Tuc III G 23 56.6 -59 36           ~ 229 0

To bookmark this query, right click on this link: simbad:objects in 2017MNRAS.465.1879S and select 'bookmark this link' or equivalent in the popup menu