Galaxy Zoo: 3D -- Crowd-sourced Bar, Spiral and Foreground Star Masks for MaNGA Target Galaxies
Karen L. Masters, Coleman Krawczyk, Shoaib Shamsi, Alexander Todd,, Daniel Finnegan, Matthew Bershady, Kevin Bundy, Brian Cherinka, Amelia, Fraser-McKelvie, Dhanesh Krishnarao, Sandor Kruk, Richard R. Lane, David Law,, Chris Lintott, Michael Merrifield, Brooke Simmons

TL;DR
Galaxy Zoo: 3D is a crowdsourcing project that created detailed spatial maps of galaxy structures like bars, spirals, and foreground stars for nearly 30,000 MaNGA galaxies, aiding in galaxy evolution studies.
Contribution
This work provides the first large-scale, crowd-sourced spatial masks of galaxy features for MaNGA targets, enabling detailed internal structure analysis.
Findings
Spiral arms enhance star formation by a factor of three.
The catalog includes masks for galaxy centers, bars, spirals, and foreground stars.
Validation tests confirm the accuracy of crowd-sourced classifications.
Abstract
The challenge of consistent identification of internal structure in galaxies - in particular disc galaxy components like spiral arms, bars, and bulges - has hindered our ability to study the physical impact of such structure across large samples. In this paper we present Galaxy Zoo: 3D (GZ: 3D) a crowdsourcing project built on the Zooniverse platform which we used to create spatial pixel (spaxel) maps that identify galaxy centres, foreground stars, galactic bars and spiral arms for 29831 galaxies which were potential targets of the MaNGA survey (Mapping Nearby Galaxies at Apache Point Observatory, part of the fourth phase of the Sloan Digital Sky Surveys or SDSS-IV), including nearly all of the 10,010 galaxies ultimately observed. Our crowd-sourced visual identification of asymmetric, internal structures provides valuable insight on the evolutionary role of non-axisymmetric processes…
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