2005PASJ...57..429S

Query : 2005PASJ...57..429S

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

goto Full paper

goto View the references in ADS

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 - 2026 		#notes
1 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
3 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
4 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
13 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
14 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
15 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
16 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
17 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
18 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
19 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
20 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
21 UGCA 92 AG? 04 32 03.8366 +63 36 51.243   16.15       ~ 128 0
22 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
23 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
24 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
25 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
26 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
27 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 221 1
28 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
29 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
30 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
31 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
32 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
33 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
34 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
35 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
36 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
37 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
38 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
39 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
40 IC 5152 rG 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 273 1
41 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 480 1
42 NGC 7318 IG 22 35 57.912 +33 57 56.27           ~ 42 0
43 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
44 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
45 MCG-05-55-012 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 163 0
46 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
47 NAME Local Group GrG ~ ~           ~ 9325 0

To bookmark this query, right click on this link: simbad:objects in 2005PASJ...57..429S and select 'bookmark this link' or equivalent in the popup menu