2012MNRAS.426.1808T

Query : 2012MNRAS.426.1808T

2012MNRAS.426.1808T - Mon. Not. R. Astron. Soc., 426, 1808-1818 (2012/November-1)

Identifying Local Group field galaxies that have interacted with the Milky Way.

TEYSSIER M., JOHNSTON K.V. and KUHLEN M.

Abstract (from CDS):

We distinguish between Local Group field galaxies that may have passed through the virial volume of the Milky Way, and those that have not, via a statistical comparison against populations of dark matter haloes in the Via Lactea II (VLII) simulation with known orbital histories. Analysis of VLII provides expectations for this escaped population: they contribute 13per cent of the galactic population between 300 and 1500kpc from the Milky Way, and hence we anticipate that about 7 of the 54 known Local Group galaxies in that distance range are likely to be Milky Way escapees. These objects can be of any mass below that of the Milky Way, and they are expected to have positive radial velocities with respect to the Milky Way. Comparison of the radius–velocity distributions of VLII populations and measurements of Local Group galaxies presents a strong likelihood that Tucana, Cetus, NGC 3109, Sextans A, Sextans B, Antlia, NGC 6822, Phoenix, Leo T and NGC 185 have passed through the Milky Way. Most of these dwarfs have a lower HI mass fraction than the majority of dwarfs lying at similar distances to either the Milky Way or M31. Indeed, several of these galaxies – especially those with lower masses – contain signatures in their morphology, star formation history and/or gas content indicative of evolution seen in simulations of satellite/parent galactic interactions. Our results offer strong support for scenarios in which dwarfs of different types form a sequence in morphology and gas content, with evolution along the sequence being driven by interaction history.

Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS

Journal keyword(s): Galaxy: kinematics and dynamics - galaxies: dwarf - galaxies: formation - galaxies: interactions - galaxies: kinematics and dynamics - galaxies: structure

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 - 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 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
4 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
5 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
6 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
7 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
8 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
9 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
10 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
11 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
12 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
13 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
14 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
15 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
16 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
17 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
18 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
19 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
20 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
21 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
22 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
23 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
24 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
25 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
26 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
27 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
28 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
29 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
30 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
31 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
32 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 221 1
33 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
34 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
35 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
36 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
37 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
38 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
39 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
40 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
41 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
42 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
43 NAME Local Group GrG ~ ~           ~ 9325 0

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