The COSMOS2015 Catalog: Exploring the 1 < z < 6 Universe with Half a Million Galaxies

Laigle, C. and McCracken, H. J. and Ilbert, O. and Hsieh, B. C. and Davidzon, I. and Capak, P. and Hasinger, G. and Silverman, J. D. and Pichon, C. and Coupon, J. and Aussel, H. and Borgne, D. Le and Caputi, K. and Cassata, P. and Chang, Y.-Y. and Civano, F. and Dunlop, J. and Fynbo, J. and Kartaltepe, J. S. and Koekemoer, A. and Fèvre, O. Le and Floc’h, E. Le and Leauthaud, A. and Lilly, S. and Lin, L. and Marchesi, S. and Milvang-Jensen, B. and Salvato, M. and Sanders, D. B. and Scoville, N. and Smolčić, Vernesa and Stockmann, M. and Taniguchi, Y. and Tasca, L. and Toft, S. and Vaccari, Mattia and Zabl, J. (2016) The COSMOS2015 Catalog: Exploring the 1 < z < 6 Universe with Half a Million Galaxies. Astrophysical Journal Supplement Series, 224 (2). 24-1-24-23. ISSN 0067-0049

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We present the COSMOS2015(24) catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over the 2deg(2) COSMOS field. Including new YJHK(s) images from the UltraVISTA-DR2 survey, Y-band images from Subaru/Hyper-Suprime-Cam, and infrared data from the Spitzer Large Area Survey with the Hyper-Suprime-Cam Spitzer legacy program, this near-infrared-selected catalog is highly optimized for the study of galaxy evolution and environments in the early universe. To maximize catalog completeness for bluer objects and at higher redshifts, objects have been detected on a chi(2) sum of the YJHK(s) and z(++) images. The catalog contains similar to 6 x 10(5) objects in the 1.5 deg(2) UltraVISTA-DR2 region and similar to 1.5 x 10(5) objects are detected in the “ultra-deep stripes” (0.62 deg(2)) at K-s \textless= 24.7 (3 sigma, 3 `', AB magnitude). Through a comparison with the zCOSMOS-bright spectroscopic redshifts, we measure a photometric redshift precision of sigma(Delta z(1) (+ zs)) = 0.007 and a catastrophic failure fraction of eta = 0.5%. At 3 \textless z \textless 6, using the unique database of spectroscopic redshifts in COSMOS, we find sigma(Delta z(1) (+ zs)) = 0.021 and eta = 13.2%. The deepest regions reach a 90% completeness limit of 10(10)M(circle dot) to z = 4. Detailed comparisons of the color distributions, number counts, and clustering show excellent agreement with the literature in the same mass ranges. COSMOS2015 represents a unique, publicly available, valuable resource with which to investigate the evolution of galaxies within their environment back to the earliest stages of the history of the universe. The COSMOS2015 catalog is distributed via anonymous ftp and through the usual astronomical archive systems (CDS, ESO Phase 3, IRSA).

Item Type: Article
Keywords: catalogs; galaxies: evolution; galaxies: high-redshift; galaxies: photometry; methods: observational; techniques: photometric
Date: 8 June 2016
Subjects: NATURAL SCIENCES > Physics > Astronomy and Astrophysics
Additional Information: © 2016. The American Astronomical Society. Received 2015 September 30; accepted 2016 February 23; published 2016 June 8.
Divisions: Faculty of Science > Department of Physics
Publisher: IOP Publishing
Depositing User: Vernesa Smolčić
Date Deposited: 26 Mar 2017 15:42
Last Modified: 26 Mar 2017 15:42

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