2014ApJ...783....7C

Query : 2014ApJ...783....7C

2014ApJ...783....7C - Astrophys. J., 783, 7 (2014/March-1)

The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile.

COLLINS M.L.M., CHAPMAN S.C., RICH R.M., IBATA R.A., MARTIN N.F., IRWIN M.J., BATE N.F., LEWIS G.F., PENARRUBIA J., ARIMOTO N., CASEY C.M., FERGUSON A.M.N., KOCH A., McCONNACHIE A.W. and TANVIR N.

Abstract (from CDS):

We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for dSphs of the galaxy. By folding in kinematic information for 25 Andromeda dSphs, more than doubling the previous sample size, we find that a singular mass profile cannot be found to fit all of the observations well. Further, the best-fit dark matter density profile measured solely for the Milky Way dSphs is marginally discrepant with that of the Andromeda dSphs (at just beyond the 1σ level), where a profile with lower maximum circular velocity, and hence mass, is preferred. The agreement is significantly better when three extreme Andromeda outliers, And XIX, XXI, and XXV, all of which have large half-light radii ( ≳ 600 pc) and low-velocity dispersions (σv< 5 km/s), are omitted from the sample. We argue that the unusual properties of these outliers are likely caused by tidal interactions with the host galaxy.

Abstract Copyright: ∼

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

Simbad objects: 62

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Number of rows : 62
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 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
3 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
4 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
5 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
6 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
7 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
8 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
9 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
10 NAME Andromeda XXVII G 00 37 27.1 +45 23 13     16.7     ~ 82 0
11 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
12 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
13 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
14 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
15 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
16 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
17 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
18 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
19 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
20 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
21 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
22 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
23 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
24 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
25 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
26 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
27 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
28 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
29 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
30 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
31 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
32 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
33 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
34 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
35 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
36 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
37 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 204 0
38 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
39 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
40 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
41 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
42 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
43 HCC 87 G 10 36 39.0 -27 21 25     21.75   20.68 ~ 18 0
44 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
45 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
46 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
47 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
48 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
49 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
50 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
51 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
52 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
53 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
54 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
55 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
56 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
57 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
58 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
59 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
60 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
61 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
62 NAME Local Group GrG ~ ~           ~ 9325 0

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