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The Structure of Our Galaxy -- The Milky Way

The Structure of Our Galaxy -- The Milky Way The Spiral Structure of the Milky Way Spiral Arm Tracers Hot OB-type stars H II regions Supergiants Young clusters Dust Galactic Bulge and Galactic Center (nucleus) Obscured by > 30 mags of extinction by dust The infrared view 25 microns

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The Structure of Our Galaxy -- The Milky Way

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  1. The Structure of Our Galaxy -- The Milky Way

  2. The Spiral Structure of the Milky Way Spiral Arm Tracers Hot OB-type stars H II regions Supergiants Young clusters Dust

  3. Galactic Bulge and Galactic Center (nucleus) Obscured by > 30 mags of extinction by dust The infrared view

  4. 25 microns 60 microns 100 microns

  5. Inflow of gases into Sgr A Radio view Sgr A – the galactic center Massive black hole > 106 Msun

  6. Multiwavelength composite image

  7. Formation and Evolution of the Galaxy Gravitational Collapse of a large cloud Clues – age and kinematics of different populations But … increasing evidence for galactic mergers

  8. The Sagittarius Dwarf Galaxy – current merger with the Milky Way

  9. A major asymmetry in the Thick Disk Possible Causes: A triaxial thick disk Debris from a galactic merger Interaction with the bar in the disk

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