2011MNRAS.411.1480D

Query : 2011MNRAS.411.1480D

2011MNRAS.411.1480D - Mon. Not. R. Astron. Soc., 411, 1480-1494 (2011/March-1)

Rotation of halo populations in the Milky Way and M31.

DEASON A.J., BELOKUROV V. and EVANS N.W.

Abstract (from CDS):

We search for signs of rotation in the subsystems of the Milky Way and M31 that are defined by their satellite galaxies, their globular cluster populations and their Blue Horizontal Branch (BHB) stars. A set of simple distribution functions is introduced to describe anisotropic and rotating stellar populations embedded in dark haloes of approximate Navarro-Frenk-White form. The BHB stars in the Milky Way halo exhibit a dichotomy between a prograde-rotating, comparatively metal-rich component ([Fe/H] > -2) and a retrograde-rotating, comparatively metal-poor ([Fe/H] < -2) component. The prograde metal-rich population may be associated with the accretion of a massive satellite (∼109 M☉). The metal-poor population may characterize the primordial stellar halo and the net retrograde rotation could then reflect an underestimate in our adopted local standard of rest circular velocity Θ0. If Θ0 is ≈240 km/s, then the metal-poor component has no rotation and there is a net prograde rotation signal of ≈45 km/s in the metal-rich component. There is reasonable evidence that the Milky Way globular cluster and satellite galaxy systems are rotating with <vφ>≈ 50 and 40 km/s, respectively. Furthermore, a stronger signal is found for the satellite galaxies when the angular momentum vector of the satellites is inclined with respect to the normal of the disc. The dwarf spheroidal satellites of M31 exhibit prograde rotation relative to the M31 disc with <vφ>≈ 40 km/s. We postulate that this group of dwarf spheroidals may share a common origin. We also find strong evidence for systemic rotation in the globular clusters of M31 particularly for the most metal-rich.

Abstract Copyright: 2010 The Authors Monthly Notices of the Royal Astronomical Society2010 RAS

Journal keyword(s): galaxies: general - galaxies: haloes - galaxies: individual: M31 - galaxies: kinematics and dynamics - dark matter

Simbad objects: 64

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Number of rows : 64
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 IC 10 G 00 20 25.50 +59 17 17.0   13.6 9.5     ~ 1121 1
2 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 688 1
3 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 295 0
4 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 802 1
5 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1311 1
6 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2158 2
7 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12710 1
8 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 342 0
9 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 122 0
10 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 118 0
11 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 126 0
12 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 122 0
13 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11212 1
14 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1050 0
15 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 168 1
16 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 135 0
17 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1372 4
18 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 387 0
19 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1241 2
20 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 118 1
21 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 207 0
22 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 112 0
23 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 380 0
24 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 263 0
25 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1750 1
26 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7115 0
27 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1438 0
28 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17527 0
29 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 822 0
30 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1130 0
31 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 502 0
32 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 376 0
33 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1432 0
34 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 332 1
35 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 468 1
36 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1212 1
37 NAME Sextans dSph G 10 13 02.9 -01 36 53   12 10.4     ~ 859 0
38 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 321 0
39 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 843 0
40 NAME Leo V G 11 31 09.60 +02 13 12.0     16.0     ~ 205 0
41 NAME Leo IV Dwarf Galaxy G 11 32 57.0 -00 32 00     15.1     ~ 385 1
42 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 578 0
43 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 455 1
44 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1003 0
45 NAME CVn II Dwarf A GiC 12 56 18.083 +34 39 24.31   17       ~ 28 0
46 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 843 0
47 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 329 1
48 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2484 0
49 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 241 0
50 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 441 0
51 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 833 0
52 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1366 0
53 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 741 1
54 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 579 3
55 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1335 1
56 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14520 0
57 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2206 2
58 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 426 0
59 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3150 0
60 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1036 1
61 NAME Andromeda VII GiG 23 26 31.7 +50 40 33   13.6 11.8     ~ 210 1
62 NAME PegDIG G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 476 1
63 NAME Peg dSph GiG 23 51 46.4 +24 35 11   14.5 13.2     ~ 237 2
64 NAME GD-1 Stream St* ~ ~           ~ 257 0

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