2016MNRAS.456.4432S

Query : 2016MNRAS.456.4432S

2016MNRAS.456.4432S - Mon. Not. R. Astron. Soc., 456, 4432-4440 (2016/March-2)

The transverse velocity of the Andromeda system, derived from the M31 satellite population.

SALOMON J.-B., IBATA R.A., FAMAEY B., MARTIN N.F. and LEWIS G.F.

Abstract (from CDS):

We present a dynamical measurement of the tangential motion of the Andromeda system, the ensemble consisting of the Andromeda galaxy (M31) and its satellites. The system is modelled as a structure with cosmologically motivated velocity dispersion and density profiles, and we show that our method works well when tested using the most massive substructures in high-resolution Λ cold dark matter (ΛCDM) simulations. Applied to the sample of 40 currently known galaxies of this system, we find a value for the velocity along the East and North directions of vEast=-111.5±70.2 km/s and vNorth=99.4±60.0 km/s, implying a transverse velocity significantly higher than previous estimates of the proper motion of M31 itself. This result has significant implications on estimates of the mass of the Local Group, as well as on its past and future history.

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

Journal keyword(s): galaxies: dwarf - Local Group

Simbad objects: 43

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Number of rows : 43
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 Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 0
2 NGC 2 GiP 00 07 17.1156038208 +27 40 42.034864476   14.8       ~ 49 0
3 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
4 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
5 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
6 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
7 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
8 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
9 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
10 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
11 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
12 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
13 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
14 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
15 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
16 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
17 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
18 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
19 NAME M31 Group GrG 00 47 28.6 +40 17 23           ~ 65 0
20 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
21 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
22 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
23 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
24 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
25 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
26 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
27 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
28 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
29 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
30 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
31 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
32 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
33 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
34 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 43 0
35 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
36 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
37 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
38 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
39 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
40 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
41 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
42 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
43 NAME Local Group GrG ~ ~           ~ 9325 0

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