1 Spiral Galaxies Spiral Pattern Galactic Shock Galactic

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1. Spiral Galaxies, Spiral Pattern, Galactic Shock

1. Spiral Galaxies, Spiral Pattern, Galactic Shock

　 銀河衝撃波Galactic shock

　 銀河衝撃波Galactic shock

Similarity to Typhoon/Haricane Spiral=Pattern Density wave

Similarity to Typhoon/Haricane Spiral=Pattern Density wave

2. Spiral Shock in accretion disk: BH, Binary

2. Spiral Shock in accretion disk: BH, Binary

l 2 D Matsuda et al. 2000

l 2 D Matsuda et al. 2000

l 3 D Oka et al. 2002

l 3 D Oka et al. 2002

Bondi-Hoyle Accretion

Bondi-Hoyle Accretion

Rufert, Anzer 1995 l

Rufert, Anzer 1995 l

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3. Shock-wave Simulation by Hydraulic Jump

3. Shock-wave Simulation by Hydraulic Jump

4. LEC Laboratory Experiment of Cosmic Hydrodynamics

4. LEC Laboratory Experiment of Cosmic Hydrodynamics

Hydraulic Jump vs Galactic shock

Hydraulic Jump vs Galactic shock

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Collision of two supersonic flows (clusters of galaxies)

Collision of two supersonic flows (clusters of galaxies)

l 2 D Matsuda et al. 2000

l 2 D Matsuda et al. 2000

Binary accretion onto BH φ（ｒ）=1/r Dφ/dr=-1/r 2

Binary accretion onto BH φ（ｒ）=1/r Dφ/dr=-1/r 2

Accretion onto BH φ（ｒ）=1/r gravity=dφ（ｒ）/dr=-GM/r 2 φ（ｒ）=GM/r dφ/dr=-GM/r 2 Kepler motion + Accretion (shock,

Accretion onto BH φ（ｒ）=1/r gravity=dφ（ｒ）/dr=-GM/r 2 φ（ｒ）=GM/r dφ/dr=-GM/r 2 Kepler motion + Accretion (shock, viscosity)

l. Galactic Shock l銀河衝撃波

l. Galactic Shock l銀河衝撃波

Spiral / Bar shocks gvavity=g+δg sin 2θ φ（ｒ）=ln r dφ/dr=-GM/r Vrot=const

Spiral / Bar shocks gvavity=g+δg sin 2θ φ（ｒ）=ln r dφ/dr=-GM/r Vrot=const

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