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The Physical Nature of Mg II Absorption Systems

The Physical Nature of Mg II Absorption Systems. Daniel Nestor University of Florida. In collaboration with: David Turnshek & Sandhya Rao University of Pittsburgh. Shanghai, March 2005. Physical Nature of Mg II Systems. What is the detailed physical nature of Mg II absorption systems?.

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The Physical Nature of Mg II Absorption Systems

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  1. The Physical Nature of Mg II Absorption Systems Daniel Nestor University of Florida In collaboration with: David Turnshek & Sandhya Rao University of Pittsburgh

  2. Shanghai, March 2005 Physical Nature of Mg II Systems What is the detailed physical nature of Mg II absorption systems? What does this tell us about the nature of galaxies and how that nature evolves over cosmic time?

  3. Shanghai, March 2005 Physical Nature of Mg II Systems

  4. Shanghai, March 2005 Physical Nature of Mg II Systems

  5. Shanghai, March 2005 Physical Nature of Mg II Systems

  6. Shanghai, March 2005 Physical Nature of Mg II Systems

  7. Shanghai, March 2005 Physical Nature of Mg II Systems

  8. Shanghai, March 2005 Physical Nature of Mg II Systems

  9. Shanghai, March 2005 Physical Nature of Mg II Systems

  10. Shanghai, March 2005 Physical Nature of Mg II Systems

  11. Shanghai, March 2005 Churchill et al. 2000, ApJ, 543, 577 Physical Nature of Mg II Systems

  12. Shanghai, March 2005 Churchill et al. 2000, ApJ, 543, 577 Physical Nature of Mg II Systems

  13. Shanghai, March 2005 Physical Nature of Mg II Systems

  14. Shanghai, March 2005 Physical Nature of Mg II Systems

  15. Shanghai, March 2005 Weymann et al. 1998, ApJ, 506, 1 Physical Nature of Mg II Systems

  16. Shanghai, March 2005 Physical Nature of Mg II Systems

  17. Shanghai, March 2005 Physical Nature of Mg II Systems N/z = n(z)σ(z) σ  πReff 2 Reff /Reff*= (L/L*)0.15

  18. Shanghai, March 2005 Physical Nature of Mg II Systems

  19. Shanghai, March 2005 Physical Nature of Mg II Systems

  20. Shanghai, March 2005 Physical Nature of Mg II Systems zabs = 0.529 W0λ2796 = 3.14Å

  21. Shanghai, March 2005 L  1.0 – 1.5L* b  29 kpc zabs = 0.529 Physical Nature of Mg II Systems

  22. Shanghai, March 2005 Physical Nature of Mg II Systems zabs = 0.423 W0λ2796 = 4.20Å

  23. Shanghai, March 2005 L  1.9 – 2.6L* b  20 kpc zabs = 0.423 Physical Nature of Mg II Systems

  24. Shanghai, March 2005 Physical Nature of Mg II Systems zabs = 0.670 W0λ2796 = 4.07Å

  25. Shanghai, March 2005 zabs = 0.931 L  1.1 – 1.8L* b  81 kpc zabs = 0.670 L  0.4 – 0.6L* b  72 kpc L  1.9 – 3.2 L* b  81 kpc L  0.7 – 1.0 L* b  72 kpc L  2.8 – 4.7 L* b  39 kpc L  1.0 – 1.5 L* b  35 kpc Physical Nature of Mg II Systems

  26. Shanghai, March 2005 Physical Nature of Mg II Systems

  27. Shanghai, March 2005 Summary Physical Nature of Mg II Systems Mg II absorbers represent (many) different physically distinct system types: • enriched Lyα clouds • extended disk/halo systems • DLAs (varied types) • ? superwinds • ? pair/interacting systems Evolution rate is a function of W0λ2796 Determining the relative contribution of each type as a function of W0λ2796will tell us about the evolution of those types, and vice versa.

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