Статья

Galaxy Zoo 2: detailed morphological classifications for 304 122 galaxies from the Sloan Digital Sky Survey

Kyle WillettSchool of Physics and Astronomy, University of Minnesota, 116 Church St SE, Minneapolis, MN 55455, USAChris LintottAdler Planetarium, 1300 S. Lake Shore Drive, Chicago, IL 60605, USAS. P. BamfordSchool of Physics and Astronomy, The University of Nottingham, University Park, Nottingham NG7 2RD, UKKaren L. MastersSEPnet, South East Physics Network, UKBrooke SimmonsKevin CasteelsInstitut de Ciències del Cosmos, Universitat de Barcelona (UB-IEEC), Martí i Franquès 1, E-08028 Barcelona, SpainEdward M. EdmondsonInstitute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UKL. FortsonSchool of Physics and Astronomy, University of Minnesota, 116 Church St SE, Minneapolis, MN 55455, USASugata KavirajOxford Astrophysics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKWilliam C. KeelDepartment of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487, USAThomas MelvinInstitute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UKR. C. NicholSEPnet, South East Physics Network, UKM. Jordan RaddickDepartment of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218, USAKevin SchawinskiInstitute for Astronomy, Department of Physics, ETH Zürich, Wolfgang-Pauli-Strasse 16, CH-8093 Zürich, SwitzerlandR. J. SimpsonRamin SkibbaCenter for Astrophysics and Space Sciences, University of California San Diego, 9500 Gilman Dr., San Diego, CA 92093, USAArfon M. SmithAdler Planetarium, 1300 S. Lake Shore Drive, Chicago, IL 60605, USAD. ThomasSEPnet, South East Physics Network, UK

2013en

ABI

Аннотация

We present the data release for Galaxy Zoo 2 (GZ2), a citizen science project with more than 16 million morphological classifications of 304 122 galaxies drawn from the Sloan Digital Sky Survey (SDSS). Morphology is a powerful probe for quantifying a galaxy's dynamical history; however, automatic classifications of morphology (either by computer analysis of images or by using other physical parameters as proxies) still have drawbacks when compared to visual inspection. The large number of images available in current surveys makes visual inspection of each galaxy impractical for individual astronomers. GZ2 uses classifications from volunteer citizen scientists to measure morphologies for all galaxies in the DR7 Legacy survey with mr > 17, in addition to deeper images from SDSS Stripe 82. While the original GZ2 project identified galaxies as early-types, late-types or mergers, GZ2 measures finer morphological features. These include bars, bulges and the shapes of edge-on disks, as well as quantifying the relative strengths of galactic bulges and spiral arms. This paper presents the full public data release for the project, including measures of accuracy and bias. The majority (≳90 per cent) of GZ2 classifications agree with those made by professional astronomers, especially for morphological T-types, strong bars and arm curvature. Both the raw and reduced data products can be obtained in electronic format at http://data.galaxyzoo.org.

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Идентификаторы

DOI: 10.1093/mnras/stt1458

Цитирования и источники

Цитирований: 2Использованных источников: 0

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