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Morphologies and Star Formation Histories of Massive Galaxies at z > 1.3

This study examines the morphologies and star formation histories of massive galaxies at redshifts greater than 1.3, utilizing data from the CDFS and techniques such as color evolution and spectral classification. We analyze the properties of star-forming and passive galaxies, revealing that massive red galaxies show little evolution in their colors, spectral features, luminosities, and stellar masses from z ~ 2 to z ~ 1. This research highlights the implications for our understanding of galaxy formation and assembly in the early universe.

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Morphologies and Star Formation Histories of Massive Galaxies at z > 1.3

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  1. Morphologies & Star Formation Histories of Massive Galaxies at z > 1.3 • CDFS • SA12 • SA15 P. McCarthy & The GDDS Team Venice 2006

  2. Star Formation Histories Juneau et al.

  3. The Most Massive Galaxies ~ 25% z = 0 mass density Glazebrook et al.

  4. Spectral Types at z > 1.3 Star Forming Pure Passive

  5. Color Evolution Spectral Classes Passive Intermediate Composite Young

  6. Old Galaxies at 1.3 < z < 1.8 <z>=1.3

  7. Old Galaxies at 1.3 < z < 1.8 <z>=1.3 <z>=1.8

  8. Old Galaxies at 1.3 < z < 1.8 <z>=1.3 <z>=1.8 <z>=0.3

  9. Old Galaxies at 1.3 < z < 1.8 <z>=1.3 <z>=1.8 2Gyr Pegase Model

  10. Old Galaxies at 1.3 < z < 1.8 Age Fitting of 20 individual Galaxies 1.3 < z < 2.0 <zf> ~ 2.5 [Fe/H] > 0 E(B-V) ~ 1 <zf> ~ 4 [Fe/H] = 0

  11. Star Forming Galaxies 1.3 < z < 2.0 ACS F814W

  12. Pure Passive Systems ACS F814W NICMOS F160W 75-80% Spheroids

  13. Surface Brightness Profiles Z = 1.84 0.3 < Re< 1 Z = 1.32

  14. Size Distribution Little or no evolution in the size distribution

  15. Kormendy Relation at 1.3 < z < 2 Rest Frame V-Band Kormendy Diagram

  16. Kormendy Relation at 1.3 < z < 2 Passive Evolution ~1 mag per unit redshift

  17. Kormendy Relation at 1.3 < z < 2 Passive Evolution 1 mag per unit redshift Z ~ 1 Radio Galaxies Best et al. Zirm et al.

  18. Wider or Deeper Surveys? Wider IMACS on the 6.5m Baade Telescope 27 Diameter field of view

  19. 350-500 slits per mask R ~ 1000 Nod & Shuffle sky subtraction

  20. Basics ``Up-Sizing Giant Magellan Telescope 24m Aperture 18 x 18 VMOS 7 x 7 NIRMOS

  21. Conclusions • Massive Red Galaxies to z ~ 2 show little Evolution in: • Colors and Spectral Features • Luminosities & Stellar Masses • Morphologies and Sizes • Structural Scaling Laws Where are the progenitors? Not just early formation…. Early assembly? see talks by Eyles, Mobasher, Wiklind

  22. Intermediate Age Populations

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