the response of galactic gas disks to a spiral density-wave potential
DESCRIPTION
The Response of Galactic Gas Disks to A Spiral Density-wave Potential. Speaker : Hsiang-Hsu Wang Collaborator: Dr. Chi Yuan Institute of Astronomy and Astrophysics, Academia Sinica, Taiwan, R.O.C. EANAM 2006. Galactic Shock and star formation. M81. M51. near IR (3.4um, Spitzer). - PowerPoint PPT PresentationTRANSCRIPT
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The Response of Galactic Gas Disks to A The Response of Galactic Gas Disks to A Spiral Density-wave PotentialSpiral Density-wave Potential
Speaker : Hsiang-Hsu WangSpeaker : Hsiang-Hsu WangCollaborator: Dr. Chi YuanCollaborator: Dr. Chi Yuan
Institute of Astronomy and Astrophysics, Academia Sinica, Taiwan, R.O.C.
EANAM 2006EANAM 2006
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JHK band
near IR (3.4um, Spitzer)
M81 M51
Galactic Shock and star formation
visible light
visible light
spiral potential galactic shockgas response
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Chaotic structureChaotic structure
Near IR image (8um, Spitzer)Near IR image (Spitzer)
Rayleigh shear instability
M81
M51
Simulation
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Higher order responseHigher order response
Density response on disk plane Azimuthal cut at different radius: 7.3, 12, 16, 18 kpc
ILR = 3.03 kpcCR = 12.25 kpcOLR = 21.22 kpc4:1 resonance: 7.35/17.14 kpc6:1 resonance: 8.71/15.8 kpc
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With self-gravityWith self-gravity