학술논문
COSMOS2020: A panchromatic view of the Universe to $z\sim10$ from two complementary catalogs
Document Type
Working Paper
Author
Weaver, J. R.; Kauffmann, O. B.; Ilbert, O.; McCracken, H. J.; Moneti, A.; Toft, S.; Brammer, G.; Shuntov, M.; Davidzon, I.; Hsieh, B. C.; Laigle, C.; Anastasiou, A.; Jespersen, C. K.; Vinther, J.; Capak, P.; Casey, C. M.; McPartland, C. J. R.; Milvang-Jensen, B.; Mobasher, B.; Sanders, D. B.; Zalesky, L.; Arnouts, S.; Aussel, H.; Dunlop, J. S.; Faisst, A.; Franx, M.; Furtak, L. J.; Fynbo, J. P. U.; Gould, K. M. L.; Greve, T. R.; Gwyn, S.; Kartaltepe, J. S.; Kashino, D.; Koekemoer, A. M.; Kokorev, V.; Fevre, O. Le; Lilly, S.; Masters, D.; Magdis, G.; Mehta, V.; Peng, Y.; Riechers, D. A.; Salvato, M.; Sawicki, M.; Scarlata, C.; Scoville, N.; Shirley, R.; Sneppen, A.; Smolcic, V.; Steinhardt, C.; Stern, D.; Tanaka, M.; Taniguchi, Y.; Teplitz, H. I.; Vaccari, M.; Wang, W. -H.; Zamorani, G.
Source
Subject
Language
Abstract
The Cosmic Evolution Survey (COSMOS) has become a cornerstone of extragalactic astronomy. Since the last public catalog in 2015, a wealth of new imaging and spectroscopic data has been collected in the COSMOS field. This paper describes the collection, processing, and analysis of this new imaging data to produce a new reference photometric redshift catalog. Source detection and multi-wavelength photometry is performed for 1.7 million sources across the $2\,\mathrm{deg}^{2}$ of the COSMOS field, $\sim$966,000 of which are measured with all available broad-band data using both traditional aperture photometric methods and a new profile-fitting photometric extraction tool, The Farmer, which we have developed. A detailed comparison of the two resulting photometric catalogs is presented. Photometric redshifts are computed for all sources in each catalog utilizing two independent photometric redshift codes. Finally, a comparison is made between the performance of the photometric methodologies and of the redshift codes to demonstrate an exceptional degree of self-consistency in the resulting photometric redshifts. The $i<21$ sources have sub-percent photometric redshift accuracy and even the faintest sources at $25