Galaxy Zoo: Clump Scout - Design and first application of a two-dimensional aggregation tool for citizen science

Dickinson, Hugh and Adams, Dominic and Mehta, Vihang and Scarlata, Claudia and Fortson, Lucy and Serjeant, Stephen and Krawczyk, Coleman and Kruk, Sandor and Lintott, Chris and Mantha, Kameswara and Simmons, Brooke D and Walmsley, Mike (2022) Galaxy Zoo: Clump Scout - Design and first application of a two-dimensional aggregation tool for citizen science. Monthly Notices of the Royal Astronomical Society, 517 (4). ISSN 0035-8711

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Abstract

Abstract Galaxy Zoo: Clump Scout is a web-based citizen science project designed to identify and spatially locate giant star forming clumps in galaxies that were imaged by the Sloan Digital Sky Survey Legacy Survey. We present a statistically driven software framework that is designed to aggregate two-dimensional annotations of clump locations provided by multiple independent Galaxy Zoo: Clump Scout volunteers and generate a consensus label that identifies the locations of probable clumps within each galaxy. The statistical model our framework is based on allows us to assign false-positive probabilities to each of the clumps we identify, to estimate the skill levels of each of the volunteers who contribute to Galaxy Zoo: Clump Scout and also to quantitatively assess the reliability of the consensus labels that are derived for each subject. We apply our framework to a dataset containing 3,561,454 two-dimensional points, which constitute 1,739,259 annotations of 85,286 distinct subjects provided by 20,999 volunteers. Using this dataset, we identify 128,100 potential clumps distributed among 44,126 galaxies. This dataset can be used to study the prevalence and demographics of giant star forming clumps in low-redshift galaxies. The code for our aggregation software framework is publicly available at: https://github.com/ou-astrophysics/BoxAggregator

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
177918
Deposited By:
Deposited On:
21 Oct 2022 11:20
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2022 11:59