Galaxies, particularly disc galaxies, show a wide variety of internal structures (e.g. spirals, bars, and bulges). Many results from MaNGA have collapsed this structure into azimuthally averaged radial gradients, or symmetric 2D shapes, but there is significantly more information about the effect internal structures have on the evolution of galaxies available if we can identify different internal structures. One of the simplest ways to identify irregular internal structures in galaxies is by visual inspection. "Galaxy Zoo: 3D" (GZ:3D) was a site built on the Zooniverse crowdsourcing platform which allowed us to collaborate with citizen scientists to create crowd sourced spatial pixel (spaxel) maps identifying galaxy centres, foreground stars, galactic bars and spiral arms in all galaxies in the target file for the MaNGA survey. These galaxy properties are now collated in a set of masks released in this value added catalog, which is described in more detail in Masters et al. (2021), and is accessible via DR17 updates to Marvin.
Papers which have made use of these masks to date include:
- Westfall et al. 2019 (GZ:3D foreground stars are flagged in the main MaNGA Data Analysis Pipeline, DAP)
- Fraser-McKelvie et al. 2019
- Peterken et al. 2019a
- Peterken et al. 2019b
- Fraser-McKelvie et al. 2020
- Greener et al. 2020
- Krishnarao et al. 2020
