2019MNRAS.483.1314B

Query : 2019MNRAS.483.1314B

2019MNRAS.483.1314B - Mon. Not. R. Astron. Soc., 483, 1314-1341 (2019/February-2)

NIHAO XV: the environmental impact of the host galaxy on galactic satellite and field dwarf galaxies.

BUCK T., MACCIO A.V., DUTTON A.A., OBREJA A. and FRINGS J.

Abstract (from CDS):

We study the impact of the host on dwarf galaxy properties using four new Milky Way (MW)-like, ultra-high-resolution simulations (Npart > 107) from the NIHAO project. We split our sample into satellite (R < R200), nearby (1 < R/R200 < 2.5), and field (R > 2.5R200) galaxies. Simulated galaxies from all three groups are in excellent agreement with Local Group dwarf galaxies in terms of the stellar mass-velocity dispersion and stellar mass-metallicity relations, star formation histories, and stellar mass functions. Satellites and nearby galaxies show lower velocity dispersions and gas fractions compared to field galaxies. While field galaxies follow global abundance matching relations, satellites and nearby galaxies deviate from them, showing lower dark matter masses for a given stellar mass. The reason for this deficit in dark matter mass is the substantial mass loss experienced by satellites and ∼80 per cent of the nearby galaxies while orbiting inside R200 at earlier times. However, both satellites and nearby objects fall back on to the relation for field galaxies if we use the maximum of their virial mass instead of the present-day value. This allows us to provide estimates for the peak masses of observed Local Group galaxies. Finally, using radial velocities, distances, and the velocity dispersion-stellar mass relation from our simulations, we derive a metric to distinguish between galaxies harassed by the central object and unaffected ones. Applying this metric to observed objects, we find that even far-away dwarf galaxies like Eri II (D ≃ 370 kpc) have a strong probability (≃83 per cent) of having been affected by the MW in the past. This naturally explains the lack of gas and recent star formation seen in Eri II.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - Galaxy: formation - galaxies: kinematics and dynamics - Local Group - dark matter

Simbad objects: 82

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Number of rows : 82
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 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 Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
8 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
9 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
10 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 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 NAME Andromeda XXVII G 00 37 27.1 +45 23 13     16.7     ~ 82 0
14 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
15 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
16 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
17 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
18 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
19 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
20 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
21 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
22 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
23 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
24 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
25 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
26 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
27 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
28 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
29 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
30 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
31 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
32 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
33 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
34 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
35 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
36 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
37 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
38 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
39 LEDA 9140 G 02 24 40.9 -73 30 48   16.0       ~ 41 0
40 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
41 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
42 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
43 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
44 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
45 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
46 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
47 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
48 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
49 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
50 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
51 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
52 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
53 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
54 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
55 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
56 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
57 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
58 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
59 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
60 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
61 NAME CVn I dwA GiC 12 38 40.06 +32 46 00.5 16.91 16.66 16.73 16.62   ~ 242 0
62 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
63 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
64 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
65 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
66 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
67 LEDA 2801026 LSB 16 13 47.504 +54 22 08.25     15.9     ~ 115 0
68 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
69 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
70 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
71 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
72 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
73 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
74 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
75 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
76 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
77 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
78 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
79 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
80 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
81 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
82 NAME Local Group GrG ~ ~           ~ 9325 0

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