2019MNRAS.490.5182L

Query : 2019MNRAS.490.5182L

2019MNRAS.490.5182L - Mon. Not. R. Astron. Soc., 490, 5182-5195 (2019/December-3)

Ultra-diffuse galaxies in the Auriga simulations.

LIAO S., GAO L., FRENK C.S., GRAND R.J.J., GUO Q., GOMEZ F.A., MARINACCI F., PAKMOR R., SHAO S. and SPRINGEL V.

Abstract (from CDS):

We investigate the formation of ultra-diffuse galaxies (UDGs) using the Auriga high-resolution cosmological magnetohydrodynamical simulations of Milky Way-sized galaxies. We identify a sample of 92 UDGs in the simulations that match a wide range of observables such as sizes, central surface brightness, Sersic indices, colours, spatial distribution, and abundance. Auriga UDGs have dynamical masses similar to normal dwarfs. In the field, the key to their origin is a strong correlation present in low-mass dark matter haloes between galaxy size and halo spin parameter. Field UDGs form in dark matter haloes with larger spins compared to normal dwarfs in the field, in agreement with previous semi-analytical models. Satellite UDGs, on the other hand, have two different origins: ∼55 per cent of them formed as field UDGs before they were accreted; the remaining ∼45 per cent were normal field dwarfs that subsequently turned into UDGs as a result of tidal interactions.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - galaxies: formation - galaxies: haloes

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 - 2024 		#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 810 0
2 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 152 0
3 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 54 0
4 HCG 7 CGG 00 39 15.9 +00 53 17   11.4       ~ 87 0
5 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12639 1
6 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3332 2
7 ACO 168 ClG 01 15 07.58 +00 19 10.8           ~ 360 2
8 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 533 2
9 AGC 122966 LSB 02 09 29.0 +31 51 10           ~ 13 0
10 [CVD2018] NGC1052-DF4 LSB 02 39 15.11 -08 06 58.6     16.5   16.2 ~ 82 0
11 NGC 1052 Sy2 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1298 2
12 LEDA 3097693 LSB 02 41 46.80 -08 24 09.3     16.2   15.8 ~ 137 0
13 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4599 2
14 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2257 1
15 HCG 25 CGG 03 20 43.7 -01 03 07     13.6     ~ 62 0
16 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4446 3
17 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
18 HCG 44 CGG 10 18 00 +21 48.7           ~ 82 0
19 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 819 1
20 NGC 3414 GiP 10 51 16.2099174408 +27 58 30.297624852   12.1       ~ 329 0
21 PC 1133+4755 LSB 11 36 17.2 +47 38 49           ~ 7 0
22 AGC 219533 LSB 11 39 56.8 +16 43 17           ~ 10 0
23 APMUKS (BJ) B114159.94-003523.7 LSB 11 44 33.608 -00 52 05.18           ~ 10 0
24 [RDS2004] MGS sure 21 G 11 55 58.42 +00 02 35.3   19.2       ~ 10 0
25 LEDA 40181 GiC 12 23 04.731 +12 00 56.40   22       ~ 20 0
26 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6637 0
27 [MDF2015] VLSB-B LSB 12 28 10.0726 +12 43 29.447     17.6     ~ 16 0
28 LEDA 41311 GiC 12 30 23.8 +13 58 56   20       ~ 71 0
29 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4796 2
30 SMDG J1300580+265835 LSB 13 00 58.0 +26 58 35           ~ 105 0
31 SMDG J1301582+275011 LSB 13 01 58.3 +27 50 11           ~ 47 0
32 SMDG J1302166+285717 LSB 13 02 16.5 +28 57 17           ~ 12 0
33 NGC 4958 Sy1 13 05 48.8957905464 -08 01 12.999361656   12.10   10.77   ~ 103 0
34 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 263 0
35 MATLAS-1542 LSB 13 29 53.6 +46 22 20           ~ 10 0
36 NGC 5390 LIN 13 55 39.9385716624 +40 27 42.380606592   12.81 11.93 10.04   ~ 350 1
37 NGC 5473 GiG 14 04 43.2276404712 +54 53 33.499699368   12.5       ~ 145 0
38 ACO S 1063 ClG 22 48 45.4 -44 31 42           ~ 319 0
39 ZwCl 2307+0713 ClG 23 10 26.6 +07 35 13           ~ 55 0
40 HCG 95 CGG 23 19 32 +09 29.5           ~ 57 0
41 AGC 334315 LSB 23 20 11.8 +22 24 07           ~ 11 0
42 NAME Peg I ClG 23 21 +08.3           ~ 70 0
43 HCG 98 CGG 23 54 11.990 +00 22 20.17           ~ 39 0

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