CDFS SA12 SA15 Morphologies & Star Formation Histories of Massive Galaxies at z > 1.3 P. McCarthy &...
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Transcript of CDFS SA12 SA15 Morphologies & Star Formation Histories of Massive Galaxies at z > 1.3 P. McCarthy &...
![Page 1: CDFS SA12 SA15 Morphologies & Star Formation Histories of Massive Galaxies at z > 1.3 P. McCarthy & The GDDS Team Venice 2006.](https://reader036.fdocuments.us/reader036/viewer/2022070306/551618e6550346cf6f8b65bf/html5/thumbnails/1.jpg)
• CDFS
• SA12
• SA15
Morphologies & Star Formation Histories of Massive Galaxies at z > 1.3
P. McCarthy
&
The GDDS Team
Venice 2006
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Star Formation HistoriesJu
neau
et a
l.
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The Most Massive Galaxies
~ 25% z = 0
mass density
Glazebrook et al.
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Spectral Types at z > 1.3
Star Forming
Pure Passive
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Color Evolution
Passive
Intermediate
Composite
Young
Spectral Classes
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Old Galaxies at 1.3 < z < 1.8
<z>=1.3
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Old Galaxies at 1.3 < z < 1.8
<z>=1.3
<z>=1.8
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Old Galaxies at 1.3 < z < 1.8
<z>=1.3
<z>=1.8
<z>=0.3
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Old Galaxies at 1.3 < z < 1.8
<z>=1.3
<z>=1.8
2GyrPegase Model
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Old Galaxies at 1.3 < z < 1.8Age 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
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Star Forming Galaxies 1.3 < z < 2.0
ACS F814W
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Pure Passive Systems
ACS F814W
NICMOS F160W
75-80%
Spheroids
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Surface Brightness Profiles
Z = 1.32
Z = 1.84
0.3 < Re< 1
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Size Distribution
Little or no evolution in the size
distribution
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Kormendy Relation at 1.3 < z < 2
Rest Frame
V-Band
Kormendy Diagram
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Kormendy Relation at 1.3 < z < 2
Passive Evolution
~1 mag per unit redshift
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Kormendy Relation at 1.3 < z < 2
Passive Evolution
1 mag per unit redshift
Z ~ 1 Radio Galaxies
Best et al.
Zirm et al.
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Wider or Deeper Surveys?
IMACS on the 6.5m Baade Telescope
27 Diameter field of view
Wider
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350-500 slits per mask
R ~ 1000
Nod & Shuffle sky subtraction
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Basics ``Up-SizingGiant Magellan Telescope
24m Aperture
18 x 18 VMOS
7 x 7 NIRMOS
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Conclusions
Massive Red Galaxies to z ~ 2 show little Evolution in:
• Colors and Spectral Features
• Luminosities & Stellar Masses
• Morphologies and Sizes
• Structural Scaling Laws
Not just early formation…. Early assembly? Where are the progenitors?
see talks by Eyles, Mobasher, Wiklind
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Intermediate Age Populations