2014MNRAS.440.3511T

Query : 2014MNRAS.440.3511T

2014MNRAS.440.3511T - Mon. Not. R. Astron. Soc., 440, 3511-3519 (2014/June-1)

M31 satellite masses compared to ΛCDM subhaloes.

TOLLERUD E.J., BOYLAN-KOLCHIN M. and BULLOCK J.S.

Abstract (from CDS):

We compare the kinematics of M31's satellite galaxies to the mass profiles of the subhaloes they are expected to inhabit in the Λ cold dark matter (ΛCDM) cosmology. We consider the most massive subhaloes of an approximately M31-sized halo, following the assumption of a monotonic galaxy luminosity-to-subhalo mass mapping. While this abundance matching relation is consistent with the kinematic data for galaxies down to the luminosity of the bright satellites of the Milky Way and M31, it is not consistent with kinematic data for fainter dwarf galaxies (those with L ≲ 108L☉). Comparing the kinematics of M31's dwarf Spheroidal (dSph) satellites to the subhaloes reveals that M31's dSph satellites are too low density to be consistent with the subhaloes' mass profiles. A similar discrepancy has been reported between Milky Way dSphs and their predicted subhaloes, the `too big to fail' problem. By contrast, total mass profiles of the dwarf Elliptical (and similarly bright) satellites are consistent with the subhaloes. However, they suffer from large systematic uncertainties in their dark matter content because of substantial (and potentially dominant) contributions from baryons within their half-light radii.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: dwarf - galaxies: individual: M31 - galaxies: kinematics and dynamics - Local Group - dark matter

Simbad objects: 38

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Number of rows : 38
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 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
3 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
4 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
5 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
6 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
7 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
8 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
9 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
10 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
11 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
12 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
13 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
14 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
15 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
16 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
17 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
18 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
19 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
20 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
21 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
22 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
23 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
24 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
25 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
26 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
27 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
28 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
29 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
30 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
31 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
32 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
33 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
34 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
35 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
36 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
37 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
38 NAME Local Group GrG ~ ~           ~ 9325 0

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