2021MNRAS.506.2766H

Query : 2021MNRAS.506.2766H

2021MNRAS.506.2766H - Mon. Not. R. Astron. Soc., 506, 2766-2779 (2021/September-2)

Solo dwarfs IV: comparing and contrasting satellite and isolated dwarf galaxies in the Local Group.

HIGGS C.R. and McCONNACHIE A.W.

Abstract (from CDS):

We compare and contrast the stellar structures of isolated Local Group dwarf galaxies, as traced by their oldest stellar populations, with the satellite dwarf galaxies of the Milky Way and M 31. All Local Group dwarfs with Mv <= -6 and µo < 26.5 mag arcsec–2 are considered, taking advantage of measurements from surveys that use similar observations and analysis techniques. For the isolated dwarfs, we use the results from Solitary Local (Solo) Dwarf Galaxy Survey. We begin by confirming that the structural and dynamical properties of the two satellite populations are not obviously statistically different from each other, but we note that there many more satellites around M 31 than around the Milky Way down to equivalent magnitude and surface brightness limits. We find that dwarfs in close proximity to a massive galaxy generally show more scatter in their Kormendy relations than those in isolation. Specifically, isolated Local Group dwarf galaxies show a tighter trend of half-light radius versus magnitude than the satellite populations, and similar effects are also seen for related parameters. There appears to be a transition in the structural and dynamical properties of the dwarf galaxy population around ∼400 kpc from the Milky Way and M 31, such that the smallest, faintest, and most circular dwarf galaxies are found closer than this separation. We discuss the impact of selection effects on our analysis, and we argue that our results point to the significance of tidal interactions on the population of systems within approximately 400 kpc from the Milky Way and M 31.

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

Journal keyword(s): galaxies: dwarf - galaxies: general - Local Group - galaxies: photometry - galaxies: stellar content - galaxies: structure

Simbad objects: 56

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Number of rows : 56
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 Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
7 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
8 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
9 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
10 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
11 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
12 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
13 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
14 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
15 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
16 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
17 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
18 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
19 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
20 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
21 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
22 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
23 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
24 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
25 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
26 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
27 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
28 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
29 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
30 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 43 0
31 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
32 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
33 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
34 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
35 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
36 NAME Antlia B G 09 48 56.08 -25 59 24.0           ~ 41 0
37 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
38 NAME NGC 3109 Group GrG 09 59 35.2 -12 49 52           ~ 43 0
39 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
40 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
41 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
42 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
43 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
44 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
45 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
46 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
47 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
48 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
49 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
50 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
51 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
52 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
53 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
54 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
55 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
56 NAME Local Group GrG ~ ~           ~ 9325 0

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