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
JHK band
near IR (3.4um, Spitzer)
M81 M51
Galactic Shock and star formation
visible light
visible light
spiral potential galactic shockgas response
Chaotic structureChaotic structure
Near IR image (8um, Spitzer)Near IR image (Spitzer)
Rayleigh shear instability
M81
M51
Simulation
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
With self-gravityWith self-gravity
