2014MNRAS.442.1197H

Query : 2014MNRAS.442.1197H

2014MNRAS.442.1197H - Mon. Not. R. Astron. Soc., 442, 1197-1210 (2014/August-1)

Subhaloes gone Notts: subhaloes as tracers of the dark matter halo shape.

HOFFMANN K., PLANELLES S., GAZTANAGA E., KNEBE A., PEARCE F.R., LUX H., ONIONS J., MULDREW S.I., ELAHI P., BEHROOZI P., ASCASIBAR Y., HAN J., MACIEJEWSKI M., MERCHAN M.E., NEYRINCK M., RUIZ A.N. and SGRO M.A.

Abstract (from CDS):

We study the shapes of subhalo distributions from four dark-matter-only simulations of Milky Way-type haloes. Comparing the shapes derived from the subhalo distributions at high resolution to those of the underlying dark matter fields, we find the former to be more triaxial if the analysis is restricted to massive subhaloes. For three of the four analysed haloes, the increased triaxiality of the distributions of massive subhaloes can be explained by a systematic effect caused by the low number of objects. Subhaloes of the fourth halo show indications for anisotropic accretion via their strong triaxial distribution and orbit alignment with respect to the dark matter field. These results are independent of the employed subhalo finder. Comparing the shape of the observed Milky Way satellite distribution to those of high-resolution subhalo samples from simulations, we find agreement for samples of bright satellites, but significant deviations if faint satellites are included in the analysis. These deviations might result from observational incompleteness.

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

Journal keyword(s): methods: numerical - galaxies: haloes - cosmology: miscellaneous

Simbad objects: 30

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Number of rows : 30
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
4 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
5 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
9 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 203 1
10 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
11 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
12 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
13 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
14 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
15 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
16 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
17 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
18 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
19 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
20 NAME CVn II Dwarf A GiC 12 56 18.083 +34 39 24.31   17       ~ 30 0
21 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
22 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
23 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
24 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
25 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
26 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
27 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
28 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
29 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
30 NAME Local Group GrG ~ ~           ~ 9325 0

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