A PUBLIC K-s-SELECTED CATALOG IN THE COSMOS/ULTRAVISTA FIELD: PHOTOMETRY, PHOTOMETRIC REDSHIFTS, AND STELLAR POPULATION PARAMETERS

Adam Muzzin*, Danilo Marchesini, Mauro Stefanon, Marijn Franx, Bo Milvang-Jensen, James S. Dunlop, J. P. U. Fynbo, Gabriel Brammer, Ivo Labbe, Pieter van Dokkum

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a catalog covering 1.62 deg(2) of the COSMOS/UltraVISTA field with point-spread function (PSF) matched photometry in 30 photometric bands. The catalog covers the wavelength range 0.15-24 mu m including the available GALEX, Subaru, Canada-France-Hawaii Telescope, VISTA, and Spitzer data. Catalog sources have been selected from the DR1 UltraVISTA K-s band imaging that reaches a depth of K-s,K-tot = 23.4 AB (90% completeness). The PSF-matched catalog is generated using position-dependent PSFs ensuring accurate colors across the entire field. Also included is a catalog of photometric redshifts (z(phot)) for all galaxies computed with the EAZY code. Comparison with spectroscopy from the zCOSMOS 10k bright sample shows that up to z similar to 1.5 the z(phot) are accurate to Delta z/(1 + z) = 0.013, with a catastrophic outlier fraction of only 1.6%. The z(phot) also show good agreement with the z(phot) from the NEWFIRM Medium Band Survey out to z similar to 3. A catalog of stellar masses and stellar population parameters for galaxies determined using the FAST spectral energy distribution fitting code is provided for all galaxies. Also included are rest-frame U - V and V - J colors, L-2800 and L-IR. The UVJ color-color diagram confirms that the galaxy bi-modality is well-established out to z similar to 2. Star-forming galaxies also obey a star-forming "main sequence" out to z similar to 2.5, and this sequence evolves in a manner consistent with previous measurements. The COSMOS/UltraVISTA K-s-selected catalog covers a unique parameter space in both depth, area, and multi-wavelength coverage and promises to be a useful tool for studying the growth of the galaxy population out to z similar to 3-4.

Original languageEnglish
Article number8
Number of pages19
JournalAstrophysical Journal Supplement
Volume206
Issue number1
DOIs
Publication statusPublished - May 2013

Keywords

  • galaxies: evolution
  • galaxies: fundamental parameters
  • galaxies: high-redshift
  • infrared: galaxies
  • HUBBLE-SPACE-TELESCOPE
  • STAR-FORMING GALAXIES
  • MEDIUM-BAND SURVEY
  • SPECTRAL ENERGY-DISTRIBUTIONS
  • EXTRAGALACTIC LEGACY SURVEY
  • POST-STARBURST GALAXIES
  • AZTEC MILLIMETER SURVEY
  • EVOLUTION SURVEY COSMOS
  • ULTRA DEEP SURVEY
  • SIMILAR-TO 1.4

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