Validation of Synthetic Galaxy Catalogs
Joe Hollowed
Young Scientists Symposium Series
Argonne National Laboratory
November 14 2017
LSST
Large Synoptic Survey Telescope
SDSS Legacy
Sloan Digital Sky Survey
– 5 years (2000-2005)
– ~2.3×10⁸ objects
– ~8,400 deg² coverage
– 22.2 r-band magnitude limit
– 60.5 TB data volume
– 10 years (2022-2032)
– ~37.0×10⁹ objects
– ~20,000 deg² coverage
– 27.6 r-band magnitude limit
– 30 PB data volume
Next Generation Sky Surveys
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LSST
Large Synoptic Survey Telescope
SDSS Legacy
Sloan Digital Sky Survey
– 5 years (2000-2005)
– ~2.3×10⁸ objects
– ~8,400 deg² coverage
– 22.2 r-band magnitude limit
– 60.5 TB data volume
– 10 years (2022-2032)
– ~37.0×10⁹ objects
– ~20,000 deg² coverage
– 27.6 r-band magnitude limit
– 30 PB data volume
Next Generation Sky Surveys
How should the community prepare for upcoming petascale data releases in the early 2020's?
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QContinuum Simulation (1/16384 full sim)
Argonne National Laboratory
N-body simulations
Creating Synthetic Skies: ProtoDC2
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QContinuum Simulation (1/16384 full sim)
Argonne National Laboratory
N-body simulations
Galaxy placement & tracking
Core Tracking
Creating Synthetic Skies: ProtoDC2
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QContinuum Simulation (1/16384 full sim)
Argonne National Laboratory
Creating Synthetic Skies: ProtoDC2
N-body simulations
Galaxy placement & tracking
Galaxy placement & tracking
Galacticus, ray tracing, GalSim
Core Tracking
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Analysis
Overview
Analysis
Validation
or
Modification
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Analysis
Overview
Analysis
Validation
or
Modification
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Analysis
Overview
Analysis
Validation
or
Modification
Next gen. analysis & processing pipeline testing
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Example Validation Test
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Galaxy Cluster Validation
- Details of galaxy clustering are very sensitive to cosmology
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Galaxy Cluster Validation
- Details of galaxy clustering are very sensitive to cosmology
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Redshift-space Distortions
Galaxy Cluster Validation:
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Redshift-space Distortions
Galaxy Cluster Validation:
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Velocity Dispersion-Mass Relation
Galaxy Cluster Validation:
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SPT-GMOS spectroscopic sample
Bayliss+ 2016, Figure 3
Velocity Segregation
Galaxy Cluster Validation:
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Synthetic Catalog Release
- Successful first-stage validation of ProtoDC2 announced to the LSST-DESC collaboration, catalog released and working groups can begin testing codes
-
Toward the future:
- further refinement of protoDC2
- large-scale synthetic skies (DC2)
- LSST first light!
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Thank You!
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