GALAXY SIMULATOR
N-BODY · BARNES-HUT · LEAPFROG
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PARTICLES
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PHYSICS
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CINEMATIC
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CONTROLS
Galaxy Structure
Particles
20 000
Reset to apply
Disk radius
15.0 kpc
Reset to apply
Scale radius h
2.6 kpc
McMillan 2017 · Reset to apply
Scale height z₀
0.30 kpc
McMillan 2017 · Reset to apply
Disk mass
5.2×10¹⁰ M☉
McMillan 2017 · Reset to apply
Bulge mass
1.0×10¹⁰ M☉
Hernquist profile · Reset to apply
Bulge scale a
0.50 kpc
Reset to apply
Halo mass M₂₀₀
1.0×10¹² M☉
NFW profile · McMillan 2017
Halo concentration c
15.3
McMillan 2017
Toomre Q
1.40
Q<1 = unstable · Q>2 = featureless · Reset to apply
Physics
Softening ε
0.20 kpc
Too small = energy errors · Too large = no structure
Timestep Δt
1.0 Myr
Barnes-Hut θ
0.50
Lower = accurate · Higher = fast