2005PASJ...57..429S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST11:56:27

2005PASJ...57..429S - Publ. Astron. Soc. Jap., 57, 429-446 (2005/June-0)

A dynamical model for the orbit of the Andromeda galaxy M31 and the origin of the Local Group of galaxies.

SAWA T. and FUJIMOTO M.

Abstract (from CDS):

begin{HTML} We propose a new model for the origin and evolution of the Local Group of Galaxies (LGG) that naturally explains the formation of the Magellanic Clouds and their large orbital angular momenta around the Galaxy. The basic idea is that an off-center hydrodynamical collision occurred some 10Gyr ago between the primordial Andromeda galaxy (M31) and a similar Galaxy, and compressed the halo gas to form the LGG dwarf galaxies, including the Magellanic Clouds. New-born dwarf galaxies can be expected to locate on the orbital plane of these two massive galaxies. We reexamined the two-dimensional sky distribution of the LGG members, and confirmed an early idea that they align along two similar great circles. The planes of these circles are approximately normal to the line joining the present position of the Sun and the galactic center. We made a distribution map of these objects, and found a well-defined plane of finite thickness. Thus we could determine the orbital elements of M31 relative to the Galaxy by reproducing the well-studied dynamics of the LMC and the SMC around the Galaxy. The expected proper motion of M31 is (m<sub>l</sub>, m<sub>b</sub>) = (38 ± 16 mas yr<sup>-1</sup>, -49 ± 5 mas yr<sup>-1</sup>).

Abstract Copyright:

Journal keyword(s): galaxies: formation - galaxies: kinematics and dynamics - galaxies: Local Group

Simbad objects: 47

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Number of rows : 47

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME WLM Galaxy G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 555 2
2 NGC 55 GiG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 685 2
3 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 981 0
4 NAME Magellanic Stream HVC 00 32 -30.0           ~ 773 1
5 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 603 1
6 NAME Andromeda III G 00 35 22.7 +36 30 17     14.4     ~ 259 0
7 NGC 185 Sy2 00 38 57.970 +48 20 14.56   9.10 9.2     ~ 711 1
8 M 110 GiG 00 40 22.0544552438 +41 41 07.496294862   8.92 8.07     ~ 1183 1
9 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 1969 2
10 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10562 1
11 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 292 0
12 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9091 1
13 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1062 4
14 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 351 0
15 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1079 2
16 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 326 0
17 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5018 1
18 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 431 2
19 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1406 1
20 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5376 1
21 UGCA 92 G 04 32 04.9 +63 36 49   16.15       ~ 114 0
22 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14326 1
23 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 954 0
24 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 535 0
25 NAME Sextans B H2G 10 00 00.8201300945 +05 20 09.572530884 12.77 12.25 11.89 11.71   ~ 454 0
26 NGC 3109 G 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 679 2
27 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 192 1
28 NAME Leo I dSph G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1007 1
29 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 637 2
30 NAME Dwarf Elliptical Galaxy in Sex G 10 13 02.9 -01 36 53   12 10.4     ~ 667 0
31 NAME Leo B G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 702 0
32 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 433 0
33 NAME UMi Galaxy G 15 09 11.34 +67 12 51.7   13.60 10.6     ~ 1136 0
34 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1120 1
35 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11004 0
36 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1640 2
37 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 269 1
38 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1406 0
39 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 382 1
40 IC 5152 G 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 216 1
41 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 373 1
42 NGC 7318 IG 22 35 57.912 +33 57 56.27           ~ 33 0
43 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 255 0
44 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 201 0
45 ESO 407-18 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 138 0
46 NAME Peg Dwarf Irregular Galaxy G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 408 1
47 NAME Local Group GrG ~ ~           ~ 6660 0

    Equat.    Gal    SGal    Ecl

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2019.10.18-11:56:27

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