ORELSE in the Radio : AGN and Starbursts in High-Redshift Structures The Observations of Redshift...
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Transcript of ORELSE in the Radio : AGN and Starbursts in High-Redshift Structures The Observations of Redshift...
ORELSE in the Radio : AGN and Starbursts in High-Redshift Structures
The Observations of Redshift Evolution in Large Scale Environments Survey
Lori Lubin (UCD)Chris Fassnacht (UCD) and Neal Miller (UMD)
The ORELSE Survey Strategy
COSMOS AEGISORELSE
Search for LSS around 20 X-ray and optically selected clusters at 0.6 < z < 1.3 using deep, wide-field (30´) imaging in r´, i´, z´, J, K with:
LFC & WIRC - Palomar 5mSuprime-Cam - Subaru 8m WFCAM - UKIRT 4m
High-resolution, multi-object spectroscopy with DEIMOS
Multi-wavelength follow-up observations to study active galaxy population:
Optical - HSTX-ray - ChandraRadio – VLAMIR – Spitzer Lubin et al. 2009
Overdensity of Radio Sources
Cl 1604 Supercluster at z = 0.9
563 radio sources detected143 with measured redshifts44 confirmed members
Distribution of Radio Power in Five Structures at z = 0.7 – 1.0
Evolution in the Radio Luminosity
Luminosity evolution generally consistent with (1+z)3, consistent with other active galaxy populations
Best et al. 2002
Spatial Distribution of Radio Members
X-ray-Selected Cluster at z = 0.82 Group-Group Merger at z = 0.84
Spatial Distribution of Radio Members
Evolution in the Supercluster Environment between z = 0.9 and 0.7?
Colors of Radio Members
Evolution in the Supercluster Environment between z = 0.9 and 0.7?
Colors of Radio Members
Evolution in the Supercluster Environment between z = 0.9 and 0.7?
Radio Galaxy Morphologies
High Radio PowerBulge dominated, largely early-type galaxies
Low Radio PowerMix of morphologies
“Quasar-Mode” versus “Radio-Mode”
ORELSE in the Radio Goals
• Evolution of cluster radio population from z = 0 to 1
• Dependence of radio active fraction and radio luminosity function on global cluster properties and environment
• Comparison between SFRs measured from radio power and other techniques ([OII], mid-IR)
• Evolutionary sequence connecting X-ray and radio AGN
• Evolution in BCG properties
• Effect of AGN on cluster ICM