Статья

THE FOURSTAR GALAXY EVOLUTION SURVEY (ZFOURGE): ULTRAVIOLET TO FAR-INFRARED CATALOGS, MEDIUM-BANDWIDTH PHOTOMETRIC REDSHIFTS WITH IMPROVED ACCURACY, STELLAR MASSES, AND CONFIRMATION OF QUIESCENT GALAXIES TO z ∼ 3.5*

Caroline M. S. StraatmanLeiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands;Lee R. SpitlerAustralian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670, AustraliaRyan F. QuadriInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAIvo LabbéLeiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The NetherlandsKarl GlazebrookCentre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, VIC 3122, AustraliaS. E. PerssonCarnegie Observatories, Pasadena, CA 91101, USACasey PapovichInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAKim-Vy H. TranInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAGabriel BrammerSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAMichael J. CowleyAustralian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670, AustraliaAdam TomczakInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAThemiya NanayakkaraCentre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, VIC 3122, AustraliaLeo Y. AlcornInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USARebecca J. AllenCentre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, VIC 3122, AustraliaAdam BroussardInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAPieter van DokkumDepartment of Astronomy, Yale University, New Haven, CT 06520, USABen ForrestInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAJosha van HoudtLeiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands;Glenn G. KacprzakCentre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, VIC 3122, AustraliaLalitwadee KawinwanichakijInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USADaniel D. KelsonCarnegie Observatories, Pasadena, CA 91101, USAJanice LeeSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAPatrick J. McCarthyCarnegie Observatories, Pasadena, CA 91101, USANicola MehrtensInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAAndrew MonsonCarnegie Observatories, Pasadena, CA 91101, USAD. C. MurphySchool of Mathematics and Science, Chaffey College, 5885 Haven Avenue, Rancho Cucamonga, CA 91737, USAGlen A. ReesDepartment of Physics & Astronomy, Macquarie University, Sydney, NSW 2109, AustraliaVithal TilviInstitute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAK. E. WhitakerDepartment of Astronomy, University of Massachusetts, Amherst, MA 01003, USA

2016en

ABI

Аннотация

ABSTRACT The FourStar galaxy evolution survey (ZFOURGE) is a 45 night legacy program with the FourStar near-infrared camera on Magellan and one of the most sensitive surveys to date. ZFOURGE covers a total of 400 arcmin 2 in cosmic fields CDFS, COSMOS and UDS, overlapping CANDELS. We present photometric catalogs comprising >70,000 galaxies, selected from ultradeep K s -band detection images (25.5–26.5 AB mag, 5 σ , total), and >80% complete to K s < 25.3–25.9 AB. We use 5 near-IR medium-bandwidth filters ( J 1 , J 2 , J 3 , H s , H l ) as well as broad-band K s at 1.05–2.16 μ m to 25–26 AB at a seeing of ∼0.″5. Each field has ancillary imaging in 26–40 filters at 0.3–8 μ m. We derive photometric redshifts and stellar population properties. Comparing with spectroscopic redshifts indicates a photometric redshift uncertainty σ z = 0.010, 0.009, and 0.011 in CDFS, COSMOS, and UDS. As spectroscopic samples are often biased toward bright and blue sources, we also inspect the photometric redshift differences between close pairs of galaxies, finding σ z ,pairs = 0.01–0.02 at 1 < z < 2.5. We quantify how σ z ,pairs depends on redshift, magnitude, spectral energy distribution type, and the inclusion of FourStar medium bands. σ z ,pairs is smallest for bright, blue star-forming samples, while red star-forming galaxies have the worst σ z ,pairs . Including FourStar medium bands reduces σ z ,pairs by 50% at 1.5 < z < 2.5. We calculate star formation rates (SFRs) based on ultraviolet and ultradeep far-IR Spitzer /MIPS and Herschel /PACS data. We derive rest-frame U − V and V − J colors, and illustrate how these correlate with specific SFR and dust emission to z = 3.5. We confirm the existence of quiescent galaxies at z ∼ 3, demonstrating their SFRs are suppressed by > ×15.

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Идентификаторы

DOI: 10.3847/0004-637x/830/1/51

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Цитирований: 1Использованных источников: 0

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