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Title: CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST

Abstract

This paper introduces cosmoDC2, a large synthetic galaxy catalog designed to support precision dark energy science with the Large Synoptic Survey Telescope (LSST). CosmoDC2 is the starting point for the second data challenge (DC2) carried out by the LSST Dark Energy Science Collaboration (LSST DESC). The catalog is based on a trillion-particle, (4.225 Gpc) 3 box cosmological N-body simulation, the Outer Rim run. It covers 440 deg 2 of sky area to a redshift of z = 3 and matches expected number densities from contemporary surveys to a magnitude depth of 28 in the r band. Each galaxy is characterized by a multitude of galaxy properties including stellar mass, morphology, spectral energy distributions, broadband filter magnitudes, host halo information, and weak lensing shear. The size and complexity of cosmoDC2 requires an efficient catalog generation methodology; our approach is based on a new hybrid technique that combines data-based empirical approaches with semianalytic galaxy modeling. A wide range of observation-based validation tests has been implemented to ensure that cosmoDC2 enables the science goals of the planned LSST DESC DC2 analyses. This paper also represents the official release of the cosmoDC2 data set, including an efficient reader that facilitates interaction with the data.

Authors:
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Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Aeronautic and Space Administration (NASA); National Science Foundation (NSF)
Contributing Org.:
The LSST Dark Energy Science Collaboration
OSTI Identifier:
1593661
Alternate Identifier(s):
OSTI ID: 1599073
Grant/Contract Number:  
SC0017860; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Supplement Series (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal. Supplement Series (Online); Journal Volume: 245; Journal Issue: 2; Journal ID: ISSN 1538-4365
Publisher:
American Astronomical Society/IOP
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; methods: numerical; large-scale structure of the universe

Citation Formats

Korytov, Danila, Hearin, Andrew, Kovacs, Eve, Larsen, Patricia, Rangel, Esteban, Hollowed, Joseph, Benson, Andrew J., Heitmann, Katrin, Mao, Yao-Yuan, Bahmanyar, Anita, Chang, Chihway, Campbell, Duncan, DeRose, Joseph, Finkel, Hal, Frontiere, Nicholas, Gawiser, Eric, Habib, Salman, Joachimi, Benjamin, Lanusse, François, Li, Nan, Mandelbaum, Rachel, Morrison, Christopher, Newman, Jeffrey A., Pope, Adrian, Rykoff, Eli, Simet, Melanie, To, Chun-Hao, Vikraman, Vinu, Wechsler, Risa H., and White, Martin. CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST. United States: N. p., 2019. Web. doi:10.3847/1538-4365/ab510c.
Korytov, Danila, Hearin, Andrew, Kovacs, Eve, Larsen, Patricia, Rangel, Esteban, Hollowed, Joseph, Benson, Andrew J., Heitmann, Katrin, Mao, Yao-Yuan, Bahmanyar, Anita, Chang, Chihway, Campbell, Duncan, DeRose, Joseph, Finkel, Hal, Frontiere, Nicholas, Gawiser, Eric, Habib, Salman, Joachimi, Benjamin, Lanusse, François, Li, Nan, Mandelbaum, Rachel, Morrison, Christopher, Newman, Jeffrey A., Pope, Adrian, Rykoff, Eli, Simet, Melanie, To, Chun-Hao, Vikraman, Vinu, Wechsler, Risa H., & White, Martin. CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST. United States. doi:10.3847/1538-4365/ab510c.
Korytov, Danila, Hearin, Andrew, Kovacs, Eve, Larsen, Patricia, Rangel, Esteban, Hollowed, Joseph, Benson, Andrew J., Heitmann, Katrin, Mao, Yao-Yuan, Bahmanyar, Anita, Chang, Chihway, Campbell, Duncan, DeRose, Joseph, Finkel, Hal, Frontiere, Nicholas, Gawiser, Eric, Habib, Salman, Joachimi, Benjamin, Lanusse, François, Li, Nan, Mandelbaum, Rachel, Morrison, Christopher, Newman, Jeffrey A., Pope, Adrian, Rykoff, Eli, Simet, Melanie, To, Chun-Hao, Vikraman, Vinu, Wechsler, Risa H., and White, Martin. Fri . "CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST". United States. doi:10.3847/1538-4365/ab510c.
@article{osti_1593661,
title = {CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST},
author = {Korytov, Danila and Hearin, Andrew and Kovacs, Eve and Larsen, Patricia and Rangel, Esteban and Hollowed, Joseph and Benson, Andrew J. and Heitmann, Katrin and Mao, Yao-Yuan and Bahmanyar, Anita and Chang, Chihway and Campbell, Duncan and DeRose, Joseph and Finkel, Hal and Frontiere, Nicholas and Gawiser, Eric and Habib, Salman and Joachimi, Benjamin and Lanusse, François and Li, Nan and Mandelbaum, Rachel and Morrison, Christopher and Newman, Jeffrey A. and Pope, Adrian and Rykoff, Eli and Simet, Melanie and To, Chun-Hao and Vikraman, Vinu and Wechsler, Risa H. and White, Martin},
abstractNote = {This paper introduces cosmoDC2, a large synthetic galaxy catalog designed to support precision dark energy science with the Large Synoptic Survey Telescope (LSST). CosmoDC2 is the starting point for the second data challenge (DC2) carried out by the LSST Dark Energy Science Collaboration (LSST DESC). The catalog is based on a trillion-particle, (4.225 Gpc)3 box cosmological N-body simulation, the Outer Rim run. It covers 440 deg2 of sky area to a redshift of z = 3 and matches expected number densities from contemporary surveys to a magnitude depth of 28 in the r band. Each galaxy is characterized by a multitude of galaxy properties including stellar mass, morphology, spectral energy distributions, broadband filter magnitudes, host halo information, and weak lensing shear. The size and complexity of cosmoDC2 requires an efficient catalog generation methodology; our approach is based on a new hybrid technique that combines data-based empirical approaches with semianalytic galaxy modeling. A wide range of observation-based validation tests has been implemented to ensure that cosmoDC2 enables the science goals of the planned LSST DESC DC2 analyses. This paper also represents the official release of the cosmoDC2 data set, including an efficient reader that facilitates interaction with the data.},
doi = {10.3847/1538-4365/ab510c},
journal = {The Astrophysical Journal. Supplement Series (Online)},
number = 2,
volume = 245,
place = {United States},
year = {2019},
month = {12}
}

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