Table 3:
Parameters used for the best model.
|
Model units* |
Phys. units |
NW model parameters |
Number of particles in stellar disk |
8192 |
|
Disk total mass |
0.54 |
 |
Disk radial scale length |
0.7 |
2.45 kpc |
Disk vertical scale thickness |
0.07 |
0.245 kpc |
Reference radius
 |
1.3 |
4.55 kpc |
Toomre Q at
 |
1.4 |
|
Number of particles in gas disk |
8192 |
|
Gas disk total mass |
0.054 |
 |
Gas disk radial scale length |
1.05 |
3.675 kpc |
Gas disk vertical scale thickness |
0.021 |
0.0735 kpc |
Toomre Q at
 |
1.1 |
|
Number of particles in bulge |
1024 |
|
Bulge total mass |
0.054 |
 |
Bulge radial scale length |
0.14 |
0.49 kpc |
Number of particles in halo |
8192 |
|
Halo mass |
2.04 |
 |
Halo cutoff radius |
7.0 |
24.5 kpc |
Halo core radius |
0.7 |
2.45 kpc |
SE model parameters |
Number of particles in stellar disk |
8192 |
|
Disk total mass |
0.23 |
 |
Disk radial scale length |
0.6 |
2.1 kpc |
Disk vertical scale thickness |
0.06 |
0.21 kpc |
Reference radius
 |
1.5 |
5.25 kpc |
Toomre Q at
 |
1.4 |
|
Number of particles in gas disk |
8192 |
|
Gas disk total mass |
0.023 |
 |
Gas disk radial scale length |
0.9 |
3.15 kpc |
Gas disk vertical scale thickness |
0.004 |
0.014 kpc |
Toomre Q at
 |
1.1 |
|
Number of particles in bulge |
1024 |
|
Bulge total mass |
0.046 |
 |
Bulge radialscale length |
0.12 |
0.42 kpc |
Number of particles in halo |
8192 |
|
Halo mass |
0.86 |
 |
Halo cutoff radius |
5.7 |
19.95 kpc |
Halo core radius |
0.57 |
1.995 kpc |
Encounter parameters from our best model |
Pericenter distance |
2.0 |
7.0 kpc |
Present distance |
2.4 |
8.4 kpc |
Pericenter vector direction** |
(-0.933, 0.357, 0.0473) |
|
Orbital plane normal vector direction*** |
(0.067, 0.0432, 0.997) |
|
Initial galaxy separation |
12.6 |
44.1 kpc |