2021MNRAS.504.5270D

Query : 2021MNRAS.504.5270D

2021MNRAS.504.5270D - Mon. Not. R. Astron. Soc., 504, 5270-5286 (2021/July-2)

The infall of dwarf satellite galaxies are influenced by their host's massive accretions.

D'SOUZA R. and BELL E.F.

Abstract (from CDS):

Recent progress in constraining the massive accretions (>1:10) experienced by the Milky Way (MW) and the Andromeda galaxy (M31) offers an opportunity to understand the dwarf galaxy population of the Local Group. Using zoom-in dark matter-only simulations of MW-mass haloes and concentrating on subhaloes that are thought to be capable of hosting dwarf galaxies, we demonstrate that the infall of a massive progenitor is accompanied with the accretion and destruction of a large number of subhaloes. Massive accreted progenitors do not increase the total number of infalling subhaloes on to a MW-mass host, but instead focus surrounding subhaloes on to the host causing a clustering in the infall time of subhaloes. This leads to a temporary elevation in the number of subhaloes as well as changes in their cumulative radial profile within the virial radius of the host. Surviving subhaloes associated with a massive progenitor have a large diversity in their orbits. We find that the star formation quenching times of Local Group dwarf spheroidal galaxies (105 M☉ ≲M* ≲107 M☉) are clustered around the times of the most massive accretions suffered by the MW and M31. Our results imply that (a) the quenching time of dwarf spheroidals is a good proxy of their infall time and b) the absence of recently quenched satellites around M31 suggests that M33 is not on its first infall and was accreted much earlier.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): Galaxy: halo - galaxies: dwarf - galaxies: Local Group

Simbad objects: 52

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Number of rows : 52
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 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
4 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
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 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
8 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
9 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
10 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
11 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
12 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
13 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
14 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
15 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
16 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
17 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
18 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
19 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
20 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
21 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
22 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
23 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
24 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
25 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
26 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
27 NAME Cas 2 GiG 02 56 51.6359356200 +58 54 42.136879608           ~ 84 0
28 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 43 0
29 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
30 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
31 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
32 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
33 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
34 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
35 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
36 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
37 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
38 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
39 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
40 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
41 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
42 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
43 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
44 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
45 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
46 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
47 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
48 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
49 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
50 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
51 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
52 NAME Local Group GrG ~ ~           ~ 9325 0

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