Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies

Abstract

Morphology is a powerful indicator of a galaxy's dynamical and merger history. It is strongly correlated with many physical parameters, including mass, star formation history and the distribution of mass. The Galaxy Zoo project collected simple morphological classifications of nearly 900,000 galaxies drawn from the Sloan Digital Sky Survey, contributed by hundreds of thousands of volunteers. This large number of classifications allows us to exclude classifier error, and measure the influence of subtle biases inherent in morphological classification. This paper presents the data collected by the project, alongside measures of classification accuracy and bias. The data are now publicly available and full catalogues can be downloaded in electronic format from http://data.galaxyzoo.org.

Accepted by MNRAS, 14 pages. Updated to match final version; problem with table 7 header fixed. Full tables available at http://data.galaxyzoo.org

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• Transient radio emission from low-redshift galaxies at z<0.3 revealed by VLASS and FIRST surveys
• Type III Societies (Apparently) Do Not Exist
• Non-Parametric Cell-Based Photometric Proxies for Galaxy Morphology: Methodology and Application to the Morphologically-Defined Star Formation -- Stellar Mass Relation of Spiral Galaxies in the Local Universe
• Galaxy Image Classification using Hierarchical Data Learning with Weighted Sampling and Label Smoothing
• Dynamics and Shocks from H$\alpha$ Emission of Nearby Galaxy Mergers
• The effects of environment on the intrinsic shape of galaxies
• Labeling Bias in Galaxy Morphologies
• The ecology of dark matter haloes I: The rates and types of halo interactions
• Using 3D and 2D analysis for analyzing large-scale asymmetry in galaxy spin directions
• On the origin of red spirals: Does assembly bias play a role?
• Can a conditioning on stellar mass explain the mutual information between morphology and environment?
• Searching for late-time interaction signatures in Type Ia supernovae from the Zwicky Transient Facility
• The structural properties of nearby dwarf galaxies in low density environments -- size, surface brightness and colour gradients
• The influence of Hickson-like compact group environment on galaxy luminosities
• The ubiquity of AGN winds in Seyfert 1 galaxies at low redshift
• Dissecting the morphological and spectroscopic properties of galaxies in the local Universe: I. Elliptical galaxies
• Morphology-based query for galaxy image databases
• Pseudo bulges in galaxy groups: the role of environment in secular evolution
• Managing the Public to Manage Data: Citizen Science and Astronomy
• Distortion of Infall Regions in Redshift Space-I
• Reconstructing Orbits of Galaxies in Extreme Regions (ROGER) III: galaxy evolution patterns in projected phase space around massive X-ray clusters
• The impact of low luminosity AGN on their host galaxies: A radio and optical investigation of the kpc-scale outflow in MaNGA 1-166919
• Merger identification through photometric bands, colours, and their errors
• Comparing galaxy populations in compact and loose groups of galaxies II: brightest group galaxies
• Estimating densities with nonlinear support using Fisher-Gaussian kernels
• A Morphological Study on Galaxies Hosting Optical Variability-Selected AGNs in the COSMOS Field
• Galaxy Zoo Morphology and Photometric Redshifts in the Sloan Digital Sky Survey
• Firefly: a browser-based interactive 3D data visualization tool for millions of data points
• Automated Detection of Galactic Rings from SDSS Images
• Hubble flow variations as a test for inhomogeneous cosmology
• Citizen Science to Assess Light Pollution with Mobile Phones
• The Metallicity measurement of Early-type Galaxies
• When Scientists Become Social Scientists: How Citizen Science Projects Learn About Volunteers
• DeepGalaxy: Deducing the Properties of Galaxy Mergers from Images Using Deep Neural Networks
• A search for gravitationally lensed supernovae within the Zwicky Transient Facility public survey
• The less significant role of large-scale environment than optical AGN in nearby, isolated elliptical galaxies
• Morphology, color-magnitude and scaling relations of galaxies in Abell 426
• Bayesian bulge-disc decomposition of galaxy images
• The Origin of Star Formation in Early-type Galaxies Inferred from Spatially Resolved Spectroscopy
• The PSF Smoothing Effect on Concentration-Related Parameters of High Redshift Galaxies in HST and JWST
• The Log Log Prior for the Frequency of Extraterrestrial Intelligences
• Planet Hunters TESS V: a planetary system around a binary star, including a mini-Neptune in the habitable zone
• CzSL: Learning from citizen science, experts and unlabelled data in astronomical image classification
• The impact of environmental effects on AGN: a decline in the incidence of ionized outflows
• Galaxy Spin Classification I: Z-wise vs S-wise Spirals With Chirality Equivariant Residual Network
• The properties and environment of very young galaxies in the local Universe
• Stellar Population Properties of ETGs in Compact Groups of Galaxies
• The Arecibo Galaxy Environment Survey (AGES) XI: the expanded Abell 1367 field. Data catalogue and HI census over the surveyed volume
• A young galaxy cluster in the old Universe
• Estimating The Metallicity of Star-forming Early-type Galaxies
• How the spectral energy distribution and galaxy morphology constrain each other, with application to morphological selection using galaxy colours
• SpArcFiRe: morphological selection effects due to reduced visibility of tightly winding arms in distant spiral galaxies
• A Morphological Study on AGN-host Dwarf Galaxies
• AstroInspect: a web-based system to organize, assess, and visually inspect astronomical objects
• Extreme gas kinematics in an off-nuclear HII region of SDSS J143245.98+404300.3
• Discovery of the Polar Ring Galaxies with deep learning
• Tackling the Problem of Distributional Shifts: Correcting Misspecified, High-Dimensional Data-Driven Priors for Inverse Problems
• The host galaxies of radio-loud AGN: colour structure
• Image feature extraction and galaxy classification: a novel and efficient approach with automated machine learning
• The MOSDEF Survey: Probing Resolved Stellar Populations at $z\sim 2$ Using a New Bayesian-defined Morphology Metric Called Patchiness
• Measuring the Metallicity of Early-type Galaxies. I. Composite Region
• Star formation histories of massive red spiral galaxies in the local universe
• Mock Observations: Morphological Analysis of Galaxies in TNG100 Simulations
• Observational evidence for the evolution of nuclear metallicity and star formation rate as the merger stage
• Classifying merger stages with adaptive deep learning and cosmological hydrodynamical simulations
• Galaxies OBserved as Low-luminosity Identified Nebulae (GOBLIN): a catalog of 43,000 high-probability dwarf galaxy candidates in the UNIONS survey
• Three-dimensional shapelets and an automated classification scheme for dark matter haloes
• Signatures of simulated spiral arms on radial actions
• Investigation on deep learning-based galaxy image translation models
• Launching the VASCO citizen science project
• Comparing the structural parameters of the Milky Way to other spiral galaxies
• Planet Hunters NGTS: New Planet Candidates from a Citizen Science Search of the Next Generation Transit Survey Public Data
• Automatic morphological classification of galaxies: convolutional autoencoder and bagging-based multiclustering model
• HI vs. H$\alpha$ - Comparing the Kinematic Tracers in Modeling the Initial Conditions of the Mice
• COUGS-DESI: A Catalog of Unusual Galaxies with Polar Structures in the DESI Legacy Imaging Surveys
• Using the XMM Optical Monitor to Study Cluster Galaxy Evolution
• An Adaptive Homomorphic Aperture Photometry Algorithm for Merging Galaxies
• Examining supernova events in Type 1 active galactic nuclei
• Data-driven dissection of emission-line regions in Seyfert galaxies
• DeepMerge: Classifying High-redshift Merging Galaxies with Deep Neural Networks
• On the relation of host properties and environment of AGN galaxies across the standard optical diagnostic diagram
• Galaxy evolution studies in clusters: the case of Cl0024+1652 cluster galaxies at z$\sim$0.4
• Evaluating the Accuracy of Non-parametric Galaxy Morphological Indicator Measurements in the CSST Imaging Survey
• SDSS-IV MaNGA: Stellar rotational support in disk galaxies vs. central surface density and stellar population age
• The VIMOS Public Extragalactic Redshift Survey (VIPERS). The complexity of galaxy populations at 0.4< z<1.3 revealed with unsupervised machine-learning algorithms
• Symmetries of the Large Scale Structures of the Universe as a Phenomenology of a Fractal Turbulence: The Role of the Plasma Component
• Non-Sequential Neural Network for Simultaneous, Consistent Classification and Photometric Redshifts of OTELO Galaxies
• The Next Generation Virgo Cluster Survey (NGVS). XL. The Morphological Classification of Virgo Cluster Galaxies
• Mapping Nearby Galaxies with Apache Point Observatory: Group and field galaxies' morphologies in the colour-magnitude plane
• The effect of spiral arms on the Sérsic photometry of galaxies
• Where's Swimmy?: Mining unique color features buried in galaxies by deep anomaly detection using Subaru Hyper Suprime-Cam data
• The impact of selection criteria on the properties of green valley galaxies
• HI Gas and Star Formation in Major Galaxy Pairs from the FAST All-Sky HI Survey (FASHI)
• Interpreting Galaxy Deblender GAN from the Discriminator's Perspective
• Bar Evolution in Edge-on Galaxies: A Demographic Study of Boxy/Peanut Bulges
• Unveiling an old disk around a massive young leaking blueberry in SDSS-IV MaNGA
• Enabling New Discoveries with Machine Learning
• A study of galaxies near low-redshift quasars
• Galaxy Morphological Classification with Efficient Vision Transformer
• Contrasting evolutionary pathways of fast- and slow-rotating galaxies in the green valley
• Passive spiral galaxies deeply captured by Subaru Hyper Suprime-Cam
• Accretion rate in AGN and X-ray-to-optical flux ratio at z $\le$ 0.2
• Search for spatial coincidences between galaxy mergers and Fermi-LAT 4FGL-DR4 sources
• Deep Learning for Galaxy Mergers in the Galaxy Main Sequence
• Galaxy Evolution in the Local Universe: Group Richness Effects on Mergers and Non-Mergers
• Properties of green valley galaxies in relation to their selection criteria
• Tidal Structures Around Edge-On Galaxies in Deep Imaging Surveys
• In The Neighbourhood of Tame Monsters: A study of galaxies near low-redshift quasars